./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe036.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe036.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe036.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe036.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:54:53,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:54:53,203 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:54:53,206 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:54:53,214 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:54:53,232 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:54:53,233 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:54:53,233 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:54:53,234 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:54:53,234 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:54:53,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:54:53,234 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:54:53,235 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:54:53,235 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:54:53,235 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:54:53,236 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:54:53,236 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:54:53,236 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:54:53,237 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:54:53,237 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:54:53,237 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:54:53,237 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:54:53,238 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:54:53,238 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:54:53,238 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:54:53,238 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:54:53,238 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:54:53,239 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:54:53,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:54:53,239 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:54:53,239 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:54:53,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:54:53,240 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:54:53,240 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:54:53,240 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:54:53,240 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:54:53,241 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:54:53,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:54:53,241 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:54:53,241 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:54:53,241 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:54:53,241 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:54:53,242 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:54:53,242 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:54:53,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:54:53,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:54:53,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:54:53,402 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:54:53,403 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:54:53,403 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-27 21:54:54,524 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:54:54,715 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:54:54,715 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-27 21:54:54,726 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc7f782d/d41e474d277b40379595657328c242be/FLAG871c14e18 [2024-06-27 21:54:54,737 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc7f782d/d41e474d277b40379595657328c242be [2024-06-27 21:54:54,739 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:54:54,740 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:54:54,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe036.yml/witness.yml [2024-06-27 21:54:54,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:54:54,816 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:54:54,818 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:54:54,818 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:54:54,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:54:54,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:54:54" (1/2) ... [2024-06-27 21:54:54,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d36cfeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:54:54, skipping insertion in model container [2024-06-27 21:54:54,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:54:54" (1/2) ... [2024-06-27 21:54:54,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c585408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:54:54, skipping insertion in model container [2024-06-27 21:54:54,825 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:54:54" (2/2) ... [2024-06-27 21:54:54,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d36cfeb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:54, skipping insertion in model container [2024-06-27 21:54:54,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:54:54" (2/2) ... [2024-06-27 21:54:54,827 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:54:54,847 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:54:54,849 INFO L97 edCorrectnessWitness]: Location invariant before [L768-L768] ! multithreaded || (((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) [2024-06-27 21:54:54,849 INFO L97 edCorrectnessWitness]: Location invariant before [L767-L767] ! multithreaded || (((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) [2024-06-27 21:54:54,849 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:54:54,849 INFO L106 edCorrectnessWitness]: ghost_update [L765-L765] multithreaded = 1; [2024-06-27 21:54:54,888 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:54:55,038 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i[941,954] [2024-06-27 21:54:55,190 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:54:55,200 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 21:54:55,229 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i[941,954] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:54:55,264 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:54:55,289 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:54:55,290 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55 WrapperNode [2024-06-27 21:54:55,290 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:54:55,291 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:54:55,291 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:54:55,291 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:54:55,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,303 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,317 INFO L138 Inliner]: procedures = 174, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2024-06-27 21:54:55,317 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:54:55,318 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:54:55,318 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:54:55,318 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:54:55,324 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,326 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,334 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 21:54:55,335 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,335 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,343 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,346 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,349 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,353 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:54:55,358 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:54:55,358 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:54:55,358 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:54:55,359 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (1/1) ... [2024-06-27 21:54:55,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:54:55,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:54:55,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:54:55,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:54:55,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:54:55,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:54:55,413 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:54:55,413 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:54:55,413 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:54:55,413 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:54:55,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:54:55,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:54:55,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:54:55,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:54:55,415 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:54:55,528 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:54:55,529 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:54:55,654 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:54:55,654 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:54:55,703 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:54:55,704 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:54:55,704 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:54:55 BoogieIcfgContainer [2024-06-27 21:54:55,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:54:55,708 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:54:55,709 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:54:55,712 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:54:55,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:54:54" (1/4) ... [2024-06-27 21:54:55,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a55b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:54:55, skipping insertion in model container [2024-06-27 21:54:55,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:54:54" (2/4) ... [2024-06-27 21:54:55,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a55b54 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:54:55, skipping insertion in model container [2024-06-27 21:54:55,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:54:55" (3/4) ... [2024-06-27 21:54:55,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a55b54 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:54:55, skipping insertion in model container [2024-06-27 21:54:55,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:54:55" (4/4) ... [2024-06-27 21:54:55,716 INFO L112 eAbstractionObserver]: Analyzing ICFG safe036.i [2024-06-27 21:54:55,730 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:54:55,730 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:54:55,730 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:54:55,775 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:54:55,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 80 flow [2024-06-27 21:54:55,818 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2024-06-27 21:54:55,825 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:54:55,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 34 events. 1/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-06-27 21:54:55,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 80 flow [2024-06-27 21:54:55,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 68 flow [2024-06-27 21:54:55,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:54:55,841 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;@67ab7b6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:54:55,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 21:54:55,845 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:54:55,850 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 21:54:55,850 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:54:55,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:55,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:54:55,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:55,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash 182021349, now seen corresponding path program 1 times [2024-06-27 21:54:55,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:55,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300965036] [2024-06-27 21:54:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:55,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:56,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:56,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300965036] [2024-06-27 21:54:56,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300965036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:56,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:56,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:54:56,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417945688] [2024-06-27 21:54:56,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:56,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:54:56,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:54:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:54:56,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2024-06-27 21:54:56,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:56,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:56,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2024-06-27 21:54:56,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:56,358 INFO L124 PetriNetUnfolderBase]: 114/275 cut-off events. [2024-06-27 21:54:56,358 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 21:54:56,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 275 events. 114/275 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1316 event pairs, 45 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 487. Up to 202 conditions per place. [2024-06-27 21:54:56,361 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 21 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-06-27 21:54:56,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 135 flow [2024-06-27 21:54:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:54:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:54:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-27 21:54:56,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2024-06-27 21:54:56,371 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 68 flow. Second operand 3 states and 80 transitions. [2024-06-27 21:54:56,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 135 flow [2024-06-27 21:54:56,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 21:54:56,375 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 87 flow [2024-06-27 21:54:56,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-06-27 21:54:56,379 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-06-27 21:54:56,379 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 87 flow [2024-06-27 21:54:56,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:56,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:56,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:56,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:54:56,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:56,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1170967398, now seen corresponding path program 1 times [2024-06-27 21:54:56,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:56,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996192400] [2024-06-27 21:54:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:56,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:56,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:56,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996192400] [2024-06-27 21:54:56,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996192400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:56,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:56,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:54:56,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889809415] [2024-06-27 21:54:56,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:56,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:54:56,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:56,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:54:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:54:56,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-06-27 21:54:56,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:56,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:56,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-06-27 21:54:56,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:56,549 INFO L124 PetriNetUnfolderBase]: 142/311 cut-off events. [2024-06-27 21:54:56,549 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-06-27 21:54:56,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 311 events. 142/311 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1437 event pairs, 46 based on Foata normal form. 2/310 useless extension candidates. Maximal degree in co-relation 645. Up to 235 conditions per place. [2024-06-27 21:54:56,552 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 28 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-06-27 21:54:56,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 187 flow [2024-06-27 21:54:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:54:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:54:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-27 21:54:56,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7152777777777778 [2024-06-27 21:54:56,553 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 87 flow. Second operand 4 states and 103 transitions. [2024-06-27 21:54:56,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 187 flow [2024-06-27 21:54:56,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:54:56,555 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 111 flow [2024-06-27 21:54:56,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 21:54:56,556 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2024-06-27 21:54:56,556 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 111 flow [2024-06-27 21:54:56,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:56,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:56,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:56,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:54:56,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:56,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:56,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1293567237, now seen corresponding path program 1 times [2024-06-27 21:54:56,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:56,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250769252] [2024-06-27 21:54:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:56,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:56,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:56,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250769252] [2024-06-27 21:54:56,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250769252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:56,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:56,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:54:56,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400115227] [2024-06-27 21:54:56,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:56,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:54:56,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:56,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:54:56,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:54:56,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-06-27 21:54:56,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:56,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:56,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-06-27 21:54:56,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:56,863 INFO L124 PetriNetUnfolderBase]: 141/314 cut-off events. [2024-06-27 21:54:56,863 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2024-06-27 21:54:56,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 314 events. 141/314 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1514 event pairs, 49 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 719. Up to 241 conditions per place. [2024-06-27 21:54:56,867 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 27 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-06-27 21:54:56,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 201 flow [2024-06-27 21:54:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:54:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:54:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-27 21:54:56,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 21:54:56,875 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 111 flow. Second operand 4 states and 99 transitions. [2024-06-27 21:54:56,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 201 flow [2024-06-27 21:54:56,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 192 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 21:54:56,880 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 127 flow [2024-06-27 21:54:56,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 21:54:56,881 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2024-06-27 21:54:56,881 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 127 flow [2024-06-27 21:54:56,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:56,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:56,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:56,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:54:56,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:56,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:56,883 INFO L85 PathProgramCache]: Analyzing trace with hash -296419646, now seen corresponding path program 1 times [2024-06-27 21:54:56,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:56,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453394839] [2024-06-27 21:54:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:56,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:57,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:57,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453394839] [2024-06-27 21:54:57,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453394839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:57,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:57,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:57,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856694013] [2024-06-27 21:54:57,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:57,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:57,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:57,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:57,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:54:57,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:57,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:57,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:54:57,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:57,152 INFO L124 PetriNetUnfolderBase]: 175/406 cut-off events. [2024-06-27 21:54:57,152 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-06-27 21:54:57,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 406 events. 175/406 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1992 event pairs, 43 based on Foata normal form. 4/404 useless extension candidates. Maximal degree in co-relation 926. Up to 250 conditions per place. [2024-06-27 21:54:57,156 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 39 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-27 21:54:57,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 271 flow [2024-06-27 21:54:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 21:54:57,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6620370370370371 [2024-06-27 21:54:57,158 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 127 flow. Second operand 6 states and 143 transitions. [2024-06-27 21:54:57,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 271 flow [2024-06-27 21:54:57,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 262 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 21:54:57,161 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 143 flow [2024-06-27 21:54:57,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=143, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-06-27 21:54:57,163 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2024-06-27 21:54:57,163 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 143 flow [2024-06-27 21:54:57,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:57,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:57,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:57,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:54:57,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:57,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1512600894, now seen corresponding path program 1 times [2024-06-27 21:54:57,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:57,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483375832] [2024-06-27 21:54:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:57,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:57,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:57,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483375832] [2024-06-27 21:54:57,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483375832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:57,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:57,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:57,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334744311] [2024-06-27 21:54:57,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:57,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:57,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:57,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:57,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:57,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-06-27 21:54:57,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 143 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:57,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:57,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-06-27 21:54:57,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:57,437 INFO L124 PetriNetUnfolderBase]: 182/390 cut-off events. [2024-06-27 21:54:57,452 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2024-06-27 21:54:57,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 390 events. 182/390 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1940 event pairs, 35 based on Foata normal form. 1/389 useless extension candidates. Maximal degree in co-relation 996. Up to 278 conditions per place. [2024-06-27 21:54:57,456 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 38 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-27 21:54:57,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 301 flow [2024-06-27 21:54:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:54:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:54:57,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 21:54:57,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:54:57,493 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 143 flow. Second operand 5 states and 118 transitions. [2024-06-27 21:54:57,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 301 flow [2024-06-27 21:54:57,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 285 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:54:57,495 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 180 flow [2024-06-27 21:54:57,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 21:54:57,496 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2024-06-27 21:54:57,496 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 180 flow [2024-06-27 21:54:57,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:57,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:57,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:57,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:54:57,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:57,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:57,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1499678544, now seen corresponding path program 2 times [2024-06-27 21:54:57,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:57,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136018244] [2024-06-27 21:54:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:57,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:57,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:57,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136018244] [2024-06-27 21:54:57,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136018244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:57,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:57,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:54:57,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176351175] [2024-06-27 21:54:57,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:57,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:54:57,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:57,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:54:57,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:54:57,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:54:57,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:57,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:57,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:54:57,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:57,707 INFO L124 PetriNetUnfolderBase]: 180/400 cut-off events. [2024-06-27 21:54:57,707 INFO L125 PetriNetUnfolderBase]: For 517/517 co-relation queries the response was YES. [2024-06-27 21:54:57,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1090 conditions, 400 events. 180/400 cut-off events. For 517/517 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1998 event pairs, 42 based on Foata normal form. 1/398 useless extension candidates. Maximal degree in co-relation 1071. Up to 276 conditions per place. [2024-06-27 21:54:57,710 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 33 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2024-06-27 21:54:57,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 292 flow [2024-06-27 21:54:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:54:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:54:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 21:54:57,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 21:54:57,711 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 180 flow. Second operand 5 states and 118 transitions. [2024-06-27 21:54:57,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 292 flow [2024-06-27 21:54:57,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 288 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 21:54:57,716 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 201 flow [2024-06-27 21:54:57,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2024-06-27 21:54:57,718 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2024-06-27 21:54:57,718 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 201 flow [2024-06-27 21:54:57,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:57,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:57,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:57,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:54:57,719 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:57,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:57,719 INFO L85 PathProgramCache]: Analyzing trace with hash -823354951, now seen corresponding path program 1 times [2024-06-27 21:54:57,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:57,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202900929] [2024-06-27 21:54:57,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:57,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:57,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:57,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202900929] [2024-06-27 21:54:57,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202900929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:57,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:57,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:57,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112864715] [2024-06-27 21:54:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:57,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:57,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:57,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-06-27 21:54:57,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 201 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:57,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:57,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-06-27 21:54:57,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:57,999 INFO L124 PetriNetUnfolderBase]: 187/425 cut-off events. [2024-06-27 21:54:57,999 INFO L125 PetriNetUnfolderBase]: For 671/671 co-relation queries the response was YES. [2024-06-27 21:54:58,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 425 events. 187/425 cut-off events. For 671/671 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2158 event pairs, 69 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1160. Up to 288 conditions per place. [2024-06-27 21:54:58,002 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 46 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-06-27 21:54:58,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 367 flow [2024-06-27 21:54:58,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 21:54:58,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 21:54:58,003 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 201 flow. Second operand 6 states and 138 transitions. [2024-06-27 21:54:58,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 367 flow [2024-06-27 21:54:58,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 345 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:58,005 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 214 flow [2024-06-27 21:54:58,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-06-27 21:54:58,006 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2024-06-27 21:54:58,006 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 214 flow [2024-06-27 21:54:58,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:58,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:58,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:54:58,007 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:58,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:58,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2032596261, now seen corresponding path program 2 times [2024-06-27 21:54:58,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:58,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066894839] [2024-06-27 21:54:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:58,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:58,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:58,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066894839] [2024-06-27 21:54:58,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066894839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:58,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:58,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:58,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741504843] [2024-06-27 21:54:58,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:58,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:58,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:58,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:58,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:58,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-06-27 21:54:58,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 214 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:58,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-06-27 21:54:58,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:58,230 INFO L124 PetriNetUnfolderBase]: 194/423 cut-off events. [2024-06-27 21:54:58,230 INFO L125 PetriNetUnfolderBase]: For 815/815 co-relation queries the response was YES. [2024-06-27 21:54:58,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 423 events. 194/423 cut-off events. For 815/815 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2149 event pairs, 38 based on Foata normal form. 1/421 useless extension candidates. Maximal degree in co-relation 1233. Up to 263 conditions per place. [2024-06-27 21:54:58,233 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 41 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-27 21:54:58,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 408 flow [2024-06-27 21:54:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 21:54:58,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 21:54:58,234 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 214 flow. Second operand 6 states and 140 transitions. [2024-06-27 21:54:58,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 408 flow [2024-06-27 21:54:58,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 389 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:58,236 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 260 flow [2024-06-27 21:54:58,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-06-27 21:54:58,237 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2024-06-27 21:54:58,237 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 260 flow [2024-06-27 21:54:58,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:58,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:58,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:54:58,238 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:58,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2027947687, now seen corresponding path program 1 times [2024-06-27 21:54:58,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:58,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038085976] [2024-06-27 21:54:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:58,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:58,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:58,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038085976] [2024-06-27 21:54:58,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038085976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:58,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:58,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:58,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232553245] [2024-06-27 21:54:58,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:58,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:58,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:58,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:58,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:58,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:54:58,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:58,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:54:58,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:58,396 INFO L124 PetriNetUnfolderBase]: 201/435 cut-off events. [2024-06-27 21:54:58,396 INFO L125 PetriNetUnfolderBase]: For 1052/1052 co-relation queries the response was YES. [2024-06-27 21:54:58,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 435 events. 201/435 cut-off events. For 1052/1052 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2261 event pairs, 36 based on Foata normal form. 1/433 useless extension candidates. Maximal degree in co-relation 1337. Up to 283 conditions per place. [2024-06-27 21:54:58,398 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 46 selfloop transitions, 14 changer transitions 0/73 dead transitions. [2024-06-27 21:54:58,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 454 flow [2024-06-27 21:54:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:58,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 21:54:58,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6712962962962963 [2024-06-27 21:54:58,399 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 260 flow. Second operand 6 states and 145 transitions. [2024-06-27 21:54:58,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 454 flow [2024-06-27 21:54:58,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 436 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:54:58,402 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 295 flow [2024-06-27 21:54:58,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-06-27 21:54:58,403 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-06-27 21:54:58,403 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 295 flow [2024-06-27 21:54:58,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:58,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:58,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:54:58,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:58,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1751728155, now seen corresponding path program 3 times [2024-06-27 21:54:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:58,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865125160] [2024-06-27 21:54:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:58,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:58,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865125160] [2024-06-27 21:54:58,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865125160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:58,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:58,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:58,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444319116] [2024-06-27 21:54:58,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:58,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:58,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:58,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-06-27 21:54:58,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 295 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:58,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-06-27 21:54:58,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:58,621 INFO L124 PetriNetUnfolderBase]: 199/446 cut-off events. [2024-06-27 21:54:58,622 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2024-06-27 21:54:58,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 446 events. 199/446 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2334 event pairs, 50 based on Foata normal form. 1/441 useless extension candidates. Maximal degree in co-relation 1416. Up to 272 conditions per place. [2024-06-27 21:54:58,624 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 41 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-27 21:54:58,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 441 flow [2024-06-27 21:54:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 21:54:58,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 21:54:58,625 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 295 flow. Second operand 6 states and 136 transitions. [2024-06-27 21:54:58,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 441 flow [2024-06-27 21:54:58,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 69 transitions, 425 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:54:58,628 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 316 flow [2024-06-27 21:54:58,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-06-27 21:54:58,628 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2024-06-27 21:54:58,628 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 316 flow [2024-06-27 21:54:58,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:58,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:58,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:54:58,629 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:58,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:58,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1682573729, now seen corresponding path program 2 times [2024-06-27 21:54:58,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:58,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921924024] [2024-06-27 21:54:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:58,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:58,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:58,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921924024] [2024-06-27 21:54:58,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921924024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:58,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:58,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:58,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715829390] [2024-06-27 21:54:58,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:58,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:58,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:58,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:58,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:58,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:54:58,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:58,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:54:58,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:58,788 INFO L124 PetriNetUnfolderBase]: 206/442 cut-off events. [2024-06-27 21:54:58,788 INFO L125 PetriNetUnfolderBase]: For 1466/1466 co-relation queries the response was YES. [2024-06-27 21:54:58,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1533 conditions, 442 events. 206/442 cut-off events. For 1466/1466 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2303 event pairs, 36 based on Foata normal form. 1/440 useless extension candidates. Maximal degree in co-relation 1506. Up to 288 conditions per place. [2024-06-27 21:54:58,790 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 43 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-27 21:54:58,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 500 flow [2024-06-27 21:54:58,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 21:54:58,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-06-27 21:54:58,792 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 316 flow. Second operand 6 states and 142 transitions. [2024-06-27 21:54:58,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 500 flow [2024-06-27 21:54:58,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 459 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:58,795 INFO L231 Difference]: Finished difference. Result has 69 places, 56 transitions, 324 flow [2024-06-27 21:54:58,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2024-06-27 21:54:58,796 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2024-06-27 21:54:58,796 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 324 flow [2024-06-27 21:54:58,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:58,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:58,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:54:58,797 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:58,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:58,797 INFO L85 PathProgramCache]: Analyzing trace with hash 83580667, now seen corresponding path program 3 times [2024-06-27 21:54:58,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:58,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500555425] [2024-06-27 21:54:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:58,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:58,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:58,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500555425] [2024-06-27 21:54:58,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500555425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:58,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:58,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:58,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643675518] [2024-06-27 21:54:58,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:58,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:58,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:58,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:54:58,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:58,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:54:58,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:58,967 INFO L124 PetriNetUnfolderBase]: 204/438 cut-off events. [2024-06-27 21:54:58,967 INFO L125 PetriNetUnfolderBase]: For 1470/1470 co-relation queries the response was YES. [2024-06-27 21:54:58,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1521 conditions, 438 events. 204/438 cut-off events. For 1470/1470 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2267 event pairs, 30 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 1493. Up to 327 conditions per place. [2024-06-27 21:54:58,969 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 49 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 21:54:58,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 472 flow [2024-06-27 21:54:58,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 21:54:58,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342592592592593 [2024-06-27 21:54:58,970 INFO L175 Difference]: Start difference. First operand has 69 places, 56 transitions, 324 flow. Second operand 6 states and 137 transitions. [2024-06-27 21:54:58,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 472 flow [2024-06-27 21:54:58,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 433 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:58,974 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 308 flow [2024-06-27 21:54:58,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2024-06-27 21:54:58,975 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2024-06-27 21:54:58,975 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 308 flow [2024-06-27 21:54:58,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:58,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:58,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:58,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:54:58,976 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:58,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash 91923449, now seen corresponding path program 1 times [2024-06-27 21:54:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:58,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399258707] [2024-06-27 21:54:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:58,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:59,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:59,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399258707] [2024-06-27 21:54:59,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399258707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:59,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:59,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:54:59,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113728636] [2024-06-27 21:54:59,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:59,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:54:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:54:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:54:59,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:54:59,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:59,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:59,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:54:59,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:59,165 INFO L124 PetriNetUnfolderBase]: 201/451 cut-off events. [2024-06-27 21:54:59,165 INFO L125 PetriNetUnfolderBase]: For 1558/1558 co-relation queries the response was YES. [2024-06-27 21:54:59,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1482 conditions, 451 events. 201/451 cut-off events. For 1558/1558 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2362 event pairs, 73 based on Foata normal form. 2/447 useless extension candidates. Maximal degree in co-relation 1453. Up to 315 conditions per place. [2024-06-27 21:54:59,168 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 51 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-06-27 21:54:59,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 460 flow [2024-06-27 21:54:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:54:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:54:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 21:54:59,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 21:54:59,169 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 308 flow. Second operand 6 states and 136 transitions. [2024-06-27 21:54:59,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 460 flow [2024-06-27 21:54:59,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 423 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 21:54:59,173 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 291 flow [2024-06-27 21:54:59,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2024-06-27 21:54:59,173 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2024-06-27 21:54:59,174 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 291 flow [2024-06-27 21:54:59,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:59,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:59,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:59,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:54:59,174 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:59,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash 295992665, now seen corresponding path program 1 times [2024-06-27 21:54:59,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:59,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370875152] [2024-06-27 21:54:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:59,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:59,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:59,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370875152] [2024-06-27 21:54:59,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370875152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:59,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:59,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:54:59,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335006757] [2024-06-27 21:54:59,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:59,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:54:59,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:59,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:54:59,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:54:59,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 36 [2024-06-27 21:54:59,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:59,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:59,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 36 [2024-06-27 21:54:59,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:59,280 INFO L124 PetriNetUnfolderBase]: 106/304 cut-off events. [2024-06-27 21:54:59,280 INFO L125 PetriNetUnfolderBase]: For 717/718 co-relation queries the response was YES. [2024-06-27 21:54:59,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 839 conditions, 304 events. 106/304 cut-off events. For 717/718 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1475 event pairs, 9 based on Foata normal form. 16/291 useless extension candidates. Maximal degree in co-relation 811. Up to 103 conditions per place. [2024-06-27 21:54:59,281 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 20 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2024-06-27 21:54:59,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 399 flow [2024-06-27 21:54:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:54:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:54:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-27 21:54:59,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7638888888888888 [2024-06-27 21:54:59,283 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 291 flow. Second operand 4 states and 110 transitions. [2024-06-27 21:54:59,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 399 flow [2024-06-27 21:54:59,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 381 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:54:59,285 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 345 flow [2024-06-27 21:54:59,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=345, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-06-27 21:54:59,286 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2024-06-27 21:54:59,286 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 345 flow [2024-06-27 21:54:59,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:59,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:59,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:59,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:54:59,286 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:59,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1277360384, now seen corresponding path program 1 times [2024-06-27 21:54:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:59,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065316452] [2024-06-27 21:54:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:59,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:59,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065316452] [2024-06-27 21:54:59,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065316452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:59,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:59,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:59,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533698728] [2024-06-27 21:54:59,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:59,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:59,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:59,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:59,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:54:59,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:59,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:59,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:54:59,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:59,523 INFO L124 PetriNetUnfolderBase]: 172/401 cut-off events. [2024-06-27 21:54:59,523 INFO L125 PetriNetUnfolderBase]: For 1869/1869 co-relation queries the response was YES. [2024-06-27 21:54:59,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 401 events. 172/401 cut-off events. For 1869/1869 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2001 event pairs, 59 based on Foata normal form. 2/380 useless extension candidates. Maximal degree in co-relation 1395. Up to 279 conditions per place. [2024-06-27 21:54:59,525 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 53 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-27 21:54:59,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 523 flow [2024-06-27 21:54:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 21:54:59,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 21:54:59,526 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 345 flow. Second operand 7 states and 156 transitions. [2024-06-27 21:54:59,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 523 flow [2024-06-27 21:54:59,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 521 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:54:59,530 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 377 flow [2024-06-27 21:54:59,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=377, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2024-06-27 21:54:59,531 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2024-06-27 21:54:59,531 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 377 flow [2024-06-27 21:54:59,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:59,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:59,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:59,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:54:59,532 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:59,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1660179778, now seen corresponding path program 2 times [2024-06-27 21:54:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:59,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50503393] [2024-06-27 21:54:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:59,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:59,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50503393] [2024-06-27 21:54:59,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50503393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:59,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:59,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:59,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681917789] [2024-06-27 21:54:59,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:59,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:59,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:59,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:59,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:59,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:54:59,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 377 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:59,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:59,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:54:59,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:59,773 INFO L124 PetriNetUnfolderBase]: 183/441 cut-off events. [2024-06-27 21:54:59,773 INFO L125 PetriNetUnfolderBase]: For 2275/2275 co-relation queries the response was YES. [2024-06-27 21:54:59,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 441 events. 183/441 cut-off events. For 2275/2275 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2215 event pairs, 24 based on Foata normal form. 2/420 useless extension candidates. Maximal degree in co-relation 1568. Up to 253 conditions per place. [2024-06-27 21:54:59,775 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 56 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-27 21:54:59,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 579 flow [2024-06-27 21:54:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:54:59,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:54:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 21:54:59,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2024-06-27 21:54:59,777 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 377 flow. Second operand 8 states and 177 transitions. [2024-06-27 21:54:59,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 579 flow [2024-06-27 21:54:59,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 555 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:54:59,780 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 393 flow [2024-06-27 21:54:59,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=393, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2024-06-27 21:54:59,781 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 42 predicate places. [2024-06-27 21:54:59,781 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 393 flow [2024-06-27 21:54:59,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:59,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:59,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:59,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:54:59,782 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:59,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:59,782 INFO L85 PathProgramCache]: Analyzing trace with hash -291939360, now seen corresponding path program 1 times [2024-06-27 21:54:59,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:59,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231693559] [2024-06-27 21:54:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:59,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:54:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:54:59,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:54:59,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231693559] [2024-06-27 21:54:59,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231693559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:54:59,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:54:59,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:54:59,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040689154] [2024-06-27 21:54:59,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:54:59,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:54:59,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:54:59,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:54:59,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:54:59,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:54:59,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:59,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:54:59,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:54:59,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:54:59,961 INFO L124 PetriNetUnfolderBase]: 188/436 cut-off events. [2024-06-27 21:54:59,961 INFO L125 PetriNetUnfolderBase]: For 2500/2500 co-relation queries the response was YES. [2024-06-27 21:54:59,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1658 conditions, 436 events. 188/436 cut-off events. For 2500/2500 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2206 event pairs, 58 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1625. Up to 318 conditions per place. [2024-06-27 21:54:59,963 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 52 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-27 21:54:59,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 77 transitions, 575 flow [2024-06-27 21:54:59,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:54:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:54:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 21:54:59,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 21:54:59,964 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 393 flow. Second operand 7 states and 154 transitions. [2024-06-27 21:54:59,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 77 transitions, 575 flow [2024-06-27 21:54:59,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 545 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:54:59,968 INFO L231 Difference]: Finished difference. Result has 81 places, 63 transitions, 416 flow [2024-06-27 21:54:59,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2024-06-27 21:54:59,969 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2024-06-27 21:54:59,969 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 416 flow [2024-06-27 21:54:59,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:54:59,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:54:59,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:54:59,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:54:59,970 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:54:59,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:54:59,970 INFO L85 PathProgramCache]: Analyzing trace with hash 885146106, now seen corresponding path program 3 times [2024-06-27 21:54:59,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:54:59,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806099151] [2024-06-27 21:54:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:54:59,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:54:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:00,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806099151] [2024-06-27 21:55:00,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806099151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:00,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:00,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:55:00,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14272856] [2024-06-27 21:55:00,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:00,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:00,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:00,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:00,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:00,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:00,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:00,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:00,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:00,161 INFO L124 PetriNetUnfolderBase]: 199/463 cut-off events. [2024-06-27 21:55:00,161 INFO L125 PetriNetUnfolderBase]: For 2905/2905 co-relation queries the response was YES. [2024-06-27 21:55:00,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 463 events. 199/463 cut-off events. For 2905/2905 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2403 event pairs, 61 based on Foata normal form. 2/435 useless extension candidates. Maximal degree in co-relation 1702. Up to 313 conditions per place. [2024-06-27 21:55:00,164 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 47 selfloop transitions, 17 changer transitions 0/78 dead transitions. [2024-06-27 21:55:00,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 592 flow [2024-06-27 21:55:00,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 21:55:00,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-27 21:55:00,165 INFO L175 Difference]: Start difference. First operand has 81 places, 63 transitions, 416 flow. Second operand 7 states and 157 transitions. [2024-06-27 21:55:00,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 592 flow [2024-06-27 21:55:00,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 563 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:55:00,169 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 439 flow [2024-06-27 21:55:00,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2024-06-27 21:55:00,170 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-06-27 21:55:00,170 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 439 flow [2024-06-27 21:55:00,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:00,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:00,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:55:00,171 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:00,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:00,171 INFO L85 PathProgramCache]: Analyzing trace with hash -4579966, now seen corresponding path program 2 times [2024-06-27 21:55:00,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:00,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597147377] [2024-06-27 21:55:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:00,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:00,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:00,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597147377] [2024-06-27 21:55:00,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597147377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:00,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:00,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:55:00,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007144342] [2024-06-27 21:55:00,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:00,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:00,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:00,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:00,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:00,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:00,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 439 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:00,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:00,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:00,347 INFO L124 PetriNetUnfolderBase]: 211/485 cut-off events. [2024-06-27 21:55:00,348 INFO L125 PetriNetUnfolderBase]: For 3461/3463 co-relation queries the response was YES. [2024-06-27 21:55:00,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 485 events. 211/485 cut-off events. For 3461/3463 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2524 event pairs, 62 based on Foata normal form. 3/455 useless extension candidates. Maximal degree in co-relation 1875. Up to 314 conditions per place. [2024-06-27 21:55:00,350 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 42 selfloop transitions, 25 changer transitions 0/81 dead transitions. [2024-06-27 21:55:00,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 723 flow [2024-06-27 21:55:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 21:55:00,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 21:55:00,351 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 439 flow. Second operand 7 states and 161 transitions. [2024-06-27 21:55:00,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 723 flow [2024-06-27 21:55:00,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 681 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:55:00,357 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 504 flow [2024-06-27 21:55:00,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2024-06-27 21:55:00,357 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2024-06-27 21:55:00,357 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 504 flow [2024-06-27 21:55:00,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:00,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:00,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:55:00,358 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:00,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:00,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1057456440, now seen corresponding path program 3 times [2024-06-27 21:55:00,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:00,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64140839] [2024-06-27 21:55:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:00,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:00,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:00,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64140839] [2024-06-27 21:55:00,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64140839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:00,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:00,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:55:00,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979975453] [2024-06-27 21:55:00,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:00,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:00,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:00,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:00,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:00,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:00,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 504 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:00,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:00,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:00,533 INFO L124 PetriNetUnfolderBase]: 209/482 cut-off events. [2024-06-27 21:55:00,533 INFO L125 PetriNetUnfolderBase]: For 3524/3526 co-relation queries the response was YES. [2024-06-27 21:55:00,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 482 events. 209/482 cut-off events. For 3524/3526 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2509 event pairs, 62 based on Foata normal form. 3/452 useless extension candidates. Maximal degree in co-relation 1835. Up to 312 conditions per place. [2024-06-27 21:55:00,535 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 40 selfloop transitions, 26 changer transitions 0/80 dead transitions. [2024-06-27 21:55:00,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 80 transitions, 700 flow [2024-06-27 21:55:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 21:55:00,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-27 21:55:00,537 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 504 flow. Second operand 7 states and 159 transitions. [2024-06-27 21:55:00,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 80 transitions, 700 flow [2024-06-27 21:55:00,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 80 transitions, 627 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:55:00,543 INFO L231 Difference]: Finished difference. Result has 88 places, 68 transitions, 488 flow [2024-06-27 21:55:00,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=488, PETRI_PLACES=88, PETRI_TRANSITIONS=68} [2024-06-27 21:55:00,544 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2024-06-27 21:55:00,544 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 68 transitions, 488 flow [2024-06-27 21:55:00,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:00,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:00,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:55:00,544 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:00,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1057465368, now seen corresponding path program 1 times [2024-06-27 21:55:00,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:00,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992464681] [2024-06-27 21:55:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:00,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:00,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:00,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992464681] [2024-06-27 21:55:00,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992464681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:00,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:00,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:55:00,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102816546] [2024-06-27 21:55:00,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:00,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:00,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:00,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:00,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:00,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:00,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 68 transitions, 488 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:00,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:00,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:00,741 INFO L124 PetriNetUnfolderBase]: 220/508 cut-off events. [2024-06-27 21:55:00,741 INFO L125 PetriNetUnfolderBase]: For 3783/3785 co-relation queries the response was YES. [2024-06-27 21:55:00,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 508 events. 220/508 cut-off events. For 3783/3785 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2689 event pairs, 64 based on Foata normal form. 4/477 useless extension candidates. Maximal degree in co-relation 1904. Up to 354 conditions per place. [2024-06-27 21:55:00,744 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 52 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-06-27 21:55:00,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 83 transitions, 668 flow [2024-06-27 21:55:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:00,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 21:55:00,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-27 21:55:00,745 INFO L175 Difference]: Start difference. First operand has 88 places, 68 transitions, 488 flow. Second operand 7 states and 157 transitions. [2024-06-27 21:55:00,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 83 transitions, 668 flow [2024-06-27 21:55:00,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 83 transitions, 611 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:00,751 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 477 flow [2024-06-27 21:55:00,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2024-06-27 21:55:00,751 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2024-06-27 21:55:00,751 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 477 flow [2024-06-27 21:55:00,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:00,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:00,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:55:00,752 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:00,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:00,753 INFO L85 PathProgramCache]: Analyzing trace with hash -216389830, now seen corresponding path program 4 times [2024-06-27 21:55:00,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:00,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985812546] [2024-06-27 21:55:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:00,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:00,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:00,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985812546] [2024-06-27 21:55:00,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985812546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:00,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:00,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:55:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723328560] [2024-06-27 21:55:00,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:00,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:00,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:00,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:00,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:00,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:00,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:00,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:00,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:00,940 INFO L124 PetriNetUnfolderBase]: 217/499 cut-off events. [2024-06-27 21:55:00,941 INFO L125 PetriNetUnfolderBase]: For 3593/3595 co-relation queries the response was YES. [2024-06-27 21:55:00,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1881 conditions, 499 events. 217/499 cut-off events. For 3593/3595 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2666 event pairs, 69 based on Foata normal form. 4/466 useless extension candidates. Maximal degree in co-relation 1844. Up to 343 conditions per place. [2024-06-27 21:55:00,943 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 49 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2024-06-27 21:55:00,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 80 transitions, 637 flow [2024-06-27 21:55:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 21:55:00,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 21:55:00,944 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 477 flow. Second operand 7 states and 154 transitions. [2024-06-27 21:55:00,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 80 transitions, 637 flow [2024-06-27 21:55:00,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 80 transitions, 601 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:55:00,951 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 479 flow [2024-06-27 21:55:00,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=91, PETRI_TRANSITIONS=69} [2024-06-27 21:55:00,951 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2024-06-27 21:55:00,952 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 479 flow [2024-06-27 21:55:00,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:00,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:00,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:00,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:55:00,952 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:00,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:00,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1513014984, now seen corresponding path program 4 times [2024-06-27 21:55:00,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:00,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992044880] [2024-06-27 21:55:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:00,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:01,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:01,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992044880] [2024-06-27 21:55:01,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992044880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:01,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:01,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:55:01,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160806465] [2024-06-27 21:55:01,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:01,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:01,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:01,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:01,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:01,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 69 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:01,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:01,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:01,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:01,116 INFO L124 PetriNetUnfolderBase]: 229/520 cut-off events. [2024-06-27 21:55:01,117 INFO L125 PetriNetUnfolderBase]: For 4069/4071 co-relation queries the response was YES. [2024-06-27 21:55:01,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 520 events. 229/520 cut-off events. For 4069/4071 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2799 event pairs, 69 based on Foata normal form. 3/482 useless extension candidates. Maximal degree in co-relation 1981. Up to 342 conditions per place. [2024-06-27 21:55:01,119 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 40 selfloop transitions, 29 changer transitions 0/83 dead transitions. [2024-06-27 21:55:01,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 83 transitions, 775 flow [2024-06-27 21:55:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 21:55:01,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-27 21:55:01,120 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 479 flow. Second operand 7 states and 158 transitions. [2024-06-27 21:55:01,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 83 transitions, 775 flow [2024-06-27 21:55:01,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 83 transitions, 731 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:55:01,127 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 550 flow [2024-06-27 21:55:01,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=550, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2024-06-27 21:55:01,128 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2024-06-27 21:55:01,128 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 550 flow [2024-06-27 21:55:01,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:01,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:01,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:01,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:55:01,129 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:01,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:01,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1519681224, now seen corresponding path program 5 times [2024-06-27 21:55:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:01,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445183947] [2024-06-27 21:55:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:01,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:01,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:01,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445183947] [2024-06-27 21:55:01,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445183947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:01,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:01,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:55:01,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171740698] [2024-06-27 21:55:01,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:01,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:01,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:01,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:01,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:01,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:01,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 550 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:01,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:01,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:01,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:01,294 INFO L124 PetriNetUnfolderBase]: 227/517 cut-off events. [2024-06-27 21:55:01,295 INFO L125 PetriNetUnfolderBase]: For 4015/4017 co-relation queries the response was YES. [2024-06-27 21:55:01,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 517 events. 227/517 cut-off events. For 4015/4017 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2790 event pairs, 69 based on Foata normal form. 3/479 useless extension candidates. Maximal degree in co-relation 1937. Up to 340 conditions per place. [2024-06-27 21:55:01,297 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 38 selfloop transitions, 30 changer transitions 0/82 dead transitions. [2024-06-27 21:55:01,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 82 transitions, 750 flow [2024-06-27 21:55:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:01,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:01,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 21:55:01,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 21:55:01,298 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 550 flow. Second operand 7 states and 156 transitions. [2024-06-27 21:55:01,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 82 transitions, 750 flow [2024-06-27 21:55:01,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 82 transitions, 657 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:55:01,307 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 522 flow [2024-06-27 21:55:01,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2024-06-27 21:55:01,307 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2024-06-27 21:55:01,308 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 522 flow [2024-06-27 21:55:01,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:01,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:01,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:01,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:55:01,308 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:01,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:01,309 INFO L85 PathProgramCache]: Analyzing trace with hash -453795204, now seen corresponding path program 6 times [2024-06-27 21:55:01,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:01,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040266838] [2024-06-27 21:55:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:01,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:01,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:01,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040266838] [2024-06-27 21:55:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040266838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:01,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:55:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251692331] [2024-06-27 21:55:01,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:01,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:01,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:01,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:01,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:01,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:01,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 522 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:01,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:01,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:01,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:01,508 INFO L124 PetriNetUnfolderBase]: 225/516 cut-off events. [2024-06-27 21:55:01,508 INFO L125 PetriNetUnfolderBase]: For 3709/3709 co-relation queries the response was YES. [2024-06-27 21:55:01,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 516 events. 225/516 cut-off events. For 3709/3709 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2754 event pairs, 61 based on Foata normal form. 1/478 useless extension candidates. Maximal degree in co-relation 1837. Up to 392 conditions per place. [2024-06-27 21:55:01,510 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 56 selfloop transitions, 11 changer transitions 1/81 dead transitions. [2024-06-27 21:55:01,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 81 transitions, 674 flow [2024-06-27 21:55:01,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-27 21:55:01,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-27 21:55:01,522 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 522 flow. Second operand 7 states and 148 transitions. [2024-06-27 21:55:01,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 81 transitions, 674 flow [2024-06-27 21:55:01,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 81 transitions, 606 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:55:01,530 INFO L231 Difference]: Finished difference. Result has 97 places, 72 transitions, 477 flow [2024-06-27 21:55:01,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=97, PETRI_TRANSITIONS=72} [2024-06-27 21:55:01,530 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2024-06-27 21:55:01,530 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 72 transitions, 477 flow [2024-06-27 21:55:01,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:01,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:01,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:01,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:55:01,531 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:01,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:01,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1513006056, now seen corresponding path program 2 times [2024-06-27 21:55:01,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:01,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928775404] [2024-06-27 21:55:01,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:01,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:01,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:01,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928775404] [2024-06-27 21:55:01,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928775404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:01,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:01,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:55:01,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082177185] [2024-06-27 21:55:01,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:01,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:01,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:01,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:01,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:01,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:01,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 72 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:01,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:01,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:01,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:01,754 INFO L124 PetriNetUnfolderBase]: 205/478 cut-off events. [2024-06-27 21:55:01,755 INFO L125 PetriNetUnfolderBase]: For 3974/3974 co-relation queries the response was YES. [2024-06-27 21:55:01,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1657 conditions, 478 events. 205/478 cut-off events. For 3974/3974 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2463 event pairs, 63 based on Foata normal form. 2/457 useless extension candidates. Maximal degree in co-relation 1617. Up to 326 conditions per place. [2024-06-27 21:55:01,758 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 54 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-27 21:55:01,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 84 transitions, 653 flow [2024-06-27 21:55:01,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 21:55:01,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 21:55:01,768 INFO L175 Difference]: Start difference. First operand has 97 places, 72 transitions, 477 flow. Second operand 7 states and 154 transitions. [2024-06-27 21:55:01,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 84 transitions, 653 flow [2024-06-27 21:55:01,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 84 transitions, 579 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 21:55:01,777 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 451 flow [2024-06-27 21:55:01,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2024-06-27 21:55:01,778 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2024-06-27 21:55:01,778 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 451 flow [2024-06-27 21:55:01,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:01,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:01,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:01,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:55:01,779 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:01,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:01,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1856205638, now seen corresponding path program 3 times [2024-06-27 21:55:01,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:01,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835858788] [2024-06-27 21:55:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:01,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:01,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:01,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835858788] [2024-06-27 21:55:01,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835858788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:01,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:01,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:55:01,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527602482] [2024-06-27 21:55:01,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:01,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:01,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:01,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:01,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:01,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:01,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 451 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:01,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:01,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:01,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:02,034 INFO L124 PetriNetUnfolderBase]: 215/506 cut-off events. [2024-06-27 21:55:02,035 INFO L125 PetriNetUnfolderBase]: For 4198/4198 co-relation queries the response was YES. [2024-06-27 21:55:02,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1706 conditions, 506 events. 215/506 cut-off events. For 4198/4198 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2654 event pairs, 67 based on Foata normal form. 2/485 useless extension candidates. Maximal degree in co-relation 1667. Up to 365 conditions per place. [2024-06-27 21:55:02,037 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 62 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-27 21:55:02,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 85 transitions, 629 flow [2024-06-27 21:55:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 21:55:02,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-27 21:55:02,052 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 451 flow. Second operand 7 states and 150 transitions. [2024-06-27 21:55:02,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 85 transitions, 629 flow [2024-06-27 21:55:02,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 85 transitions, 593 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:55:02,061 INFO L231 Difference]: Finished difference. Result has 97 places, 74 transitions, 449 flow [2024-06-27 21:55:02,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=449, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2024-06-27 21:55:02,061 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2024-06-27 21:55:02,061 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 449 flow [2024-06-27 21:55:02,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:02,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:02,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:02,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:55:02,062 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:02,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:02,062 INFO L85 PathProgramCache]: Analyzing trace with hash -453487746, now seen corresponding path program 4 times [2024-06-27 21:55:02,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:02,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139036282] [2024-06-27 21:55:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:02,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:02,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:02,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139036282] [2024-06-27 21:55:02,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139036282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:02,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:02,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:55:02,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323723052] [2024-06-27 21:55:02,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:02,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:02,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:02,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:02,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:02,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:02,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:02,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:02,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:02,335 INFO L124 PetriNetUnfolderBase]: 212/505 cut-off events. [2024-06-27 21:55:02,335 INFO L125 PetriNetUnfolderBase]: For 3829/3829 co-relation queries the response was YES. [2024-06-27 21:55:02,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1641 conditions, 505 events. 212/505 cut-off events. For 3829/3829 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2670 event pairs, 58 based on Foata normal form. 2/486 useless extension candidates. Maximal degree in co-relation 1601. Up to 330 conditions per place. [2024-06-27 21:55:02,354 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 64 selfloop transitions, 12 changer transitions 0/89 dead transitions. [2024-06-27 21:55:02,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 637 flow [2024-06-27 21:55:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 21:55:02,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 21:55:02,355 INFO L175 Difference]: Start difference. First operand has 97 places, 74 transitions, 449 flow. Second operand 8 states and 171 transitions. [2024-06-27 21:55:02,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 637 flow [2024-06-27 21:55:02,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 89 transitions, 613 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:55:02,365 INFO L231 Difference]: Finished difference. Result has 100 places, 74 transitions, 453 flow [2024-06-27 21:55:02,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=453, PETRI_PLACES=100, PETRI_TRANSITIONS=74} [2024-06-27 21:55:02,368 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 62 predicate places. [2024-06-27 21:55:02,368 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 74 transitions, 453 flow [2024-06-27 21:55:02,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:02,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:02,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:02,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:55:02,369 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:02,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:02,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1649281769, now seen corresponding path program 1 times [2024-06-27 21:55:02,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:02,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006611215] [2024-06-27 21:55:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:02,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:02,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006611215] [2024-06-27 21:55:02,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006611215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:02,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:02,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:02,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13760835] [2024-06-27 21:55:02,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:02,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:02,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:02,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:02,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:02,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 74 transitions, 453 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:02,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:02,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:02,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:02,691 INFO L124 PetriNetUnfolderBase]: 276/651 cut-off events. [2024-06-27 21:55:02,704 INFO L125 PetriNetUnfolderBase]: For 8634/8634 co-relation queries the response was YES. [2024-06-27 21:55:02,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 651 events. 276/651 cut-off events. For 8634/8634 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3824 event pairs, 86 based on Foata normal form. 6/630 useless extension candidates. Maximal degree in co-relation 2199. Up to 283 conditions per place. [2024-06-27 21:55:02,709 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 80 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2024-06-27 21:55:02,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 783 flow [2024-06-27 21:55:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:55:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:55:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 21:55:02,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 21:55:02,711 INFO L175 Difference]: Start difference. First operand has 100 places, 74 transitions, 453 flow. Second operand 9 states and 204 transitions. [2024-06-27 21:55:02,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 783 flow [2024-06-27 21:55:02,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 753 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:02,730 INFO L231 Difference]: Finished difference. Result has 103 places, 74 transitions, 450 flow [2024-06-27 21:55:02,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=450, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2024-06-27 21:55:02,731 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2024-06-27 21:55:02,731 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 450 flow [2024-06-27 21:55:02,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:02,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:02,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:02,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:55:02,748 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:02,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:02,749 INFO L85 PathProgramCache]: Analyzing trace with hash -344354725, now seen corresponding path program 2 times [2024-06-27 21:55:02,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:02,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164719739] [2024-06-27 21:55:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:02,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:02,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:02,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164719739] [2024-06-27 21:55:02,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164719739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:02,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:02,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:02,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765774063] [2024-06-27 21:55:02,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:02,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:02,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:02,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:02,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:02,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:02,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:02,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:02,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:02,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:03,050 INFO L124 PetriNetUnfolderBase]: 298/708 cut-off events. [2024-06-27 21:55:03,064 INFO L125 PetriNetUnfolderBase]: For 9239/9239 co-relation queries the response was YES. [2024-06-27 21:55:03,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2366 conditions, 708 events. 298/708 cut-off events. For 9239/9239 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4210 event pairs, 116 based on Foata normal form. 6/683 useless extension candidates. Maximal degree in co-relation 2324. Up to 379 conditions per place. [2024-06-27 21:55:03,071 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 77 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-06-27 21:55:03,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 101 transitions, 764 flow [2024-06-27 21:55:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 21:55:03,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-27 21:55:03,073 INFO L175 Difference]: Start difference. First operand has 103 places, 74 transitions, 450 flow. Second operand 8 states and 183 transitions. [2024-06-27 21:55:03,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 101 transitions, 764 flow [2024-06-27 21:55:03,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 101 transitions, 724 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:55:03,101 INFO L231 Difference]: Finished difference. Result has 103 places, 74 transitions, 439 flow [2024-06-27 21:55:03,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=439, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2024-06-27 21:55:03,102 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2024-06-27 21:55:03,102 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 439 flow [2024-06-27 21:55:03,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:03,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:03,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:03,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:55:03,102 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:03,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:03,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1881596325, now seen corresponding path program 3 times [2024-06-27 21:55:03,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:03,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906150358] [2024-06-27 21:55:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:03,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:03,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:03,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906150358] [2024-06-27 21:55:03,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906150358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:03,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:03,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:03,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903686332] [2024-06-27 21:55:03,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:03,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:03,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:03,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:03,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:03,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:03,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 439 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:03,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:03,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:03,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:03,363 INFO L124 PetriNetUnfolderBase]: 288/680 cut-off events. [2024-06-27 21:55:03,364 INFO L125 PetriNetUnfolderBase]: For 7289/7289 co-relation queries the response was YES. [2024-06-27 21:55:03,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 680 events. 288/680 cut-off events. For 7289/7289 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4071 event pairs, 128 based on Foata normal form. 8/656 useless extension candidates. Maximal degree in co-relation 1993. Up to 445 conditions per place. [2024-06-27 21:55:03,366 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 71 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-06-27 21:55:03,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 95 transitions, 663 flow [2024-06-27 21:55:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 21:55:03,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2024-06-27 21:55:03,367 INFO L175 Difference]: Start difference. First operand has 103 places, 74 transitions, 439 flow. Second operand 8 states and 177 transitions. [2024-06-27 21:55:03,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 95 transitions, 663 flow [2024-06-27 21:55:03,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 95 transitions, 642 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:03,378 INFO L231 Difference]: Finished difference. Result has 105 places, 74 transitions, 444 flow [2024-06-27 21:55:03,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=444, PETRI_PLACES=105, PETRI_TRANSITIONS=74} [2024-06-27 21:55:03,378 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 67 predicate places. [2024-06-27 21:55:03,378 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 74 transitions, 444 flow [2024-06-27 21:55:03,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:03,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:03,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:03,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:55:03,379 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:03,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:03,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1919478215, now seen corresponding path program 4 times [2024-06-27 21:55:03,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:03,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568241471] [2024-06-27 21:55:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:03,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:03,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:03,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568241471] [2024-06-27 21:55:03,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568241471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:03,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:03,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:03,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668083543] [2024-06-27 21:55:03,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:03,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:03,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:03,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:03,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:03,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:03,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 74 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:03,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:03,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:03,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:03,597 INFO L124 PetriNetUnfolderBase]: 320/757 cut-off events. [2024-06-27 21:55:03,597 INFO L125 PetriNetUnfolderBase]: For 7799/7799 co-relation queries the response was YES. [2024-06-27 21:55:03,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2235 conditions, 757 events. 320/757 cut-off events. For 7799/7799 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4701 event pairs, 156 based on Foata normal form. 8/728 useless extension candidates. Maximal degree in co-relation 2192. Up to 467 conditions per place. [2024-06-27 21:55:03,600 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 50 selfloop transitions, 29 changer transitions 0/92 dead transitions. [2024-06-27 21:55:03,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 92 transitions, 654 flow [2024-06-27 21:55:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 21:55:03,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-06-27 21:55:03,601 INFO L175 Difference]: Start difference. First operand has 105 places, 74 transitions, 444 flow. Second operand 8 states and 182 transitions. [2024-06-27 21:55:03,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 92 transitions, 654 flow [2024-06-27 21:55:03,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 92 transitions, 634 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:03,611 INFO L231 Difference]: Finished difference. Result has 107 places, 74 transitions, 486 flow [2024-06-27 21:55:03,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=486, PETRI_PLACES=107, PETRI_TRANSITIONS=74} [2024-06-27 21:55:03,612 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 69 predicate places. [2024-06-27 21:55:03,612 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 74 transitions, 486 flow [2024-06-27 21:55:03,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:03,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:03,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:03,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:55:03,612 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:03,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:03,614 INFO L85 PathProgramCache]: Analyzing trace with hash -106524413, now seen corresponding path program 5 times [2024-06-27 21:55:03,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:03,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510907074] [2024-06-27 21:55:03,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:03,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:03,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:03,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510907074] [2024-06-27 21:55:03,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510907074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:03,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:03,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:03,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736571106] [2024-06-27 21:55:03,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:03,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:03,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:03,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:03,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:03,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:03,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 74 transitions, 486 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:03,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:03,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:03,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:03,862 INFO L124 PetriNetUnfolderBase]: 384/913 cut-off events. [2024-06-27 21:55:03,862 INFO L125 PetriNetUnfolderBase]: For 11150/11153 co-relation queries the response was YES. [2024-06-27 21:55:03,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2893 conditions, 913 events. 384/913 cut-off events. For 11150/11153 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6023 event pairs, 188 based on Foata normal form. 6/875 useless extension candidates. Maximal degree in co-relation 2849. Up to 443 conditions per place. [2024-06-27 21:55:03,867 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 56 selfloop transitions, 29 changer transitions 0/98 dead transitions. [2024-06-27 21:55:03,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 98 transitions, 788 flow [2024-06-27 21:55:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:03,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 21:55:03,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6493055555555556 [2024-06-27 21:55:03,869 INFO L175 Difference]: Start difference. First operand has 107 places, 74 transitions, 486 flow. Second operand 8 states and 187 transitions. [2024-06-27 21:55:03,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 98 transitions, 788 flow [2024-06-27 21:55:03,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 98 transitions, 732 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:03,885 INFO L231 Difference]: Finished difference. Result has 109 places, 74 transitions, 491 flow [2024-06-27 21:55:03,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=491, PETRI_PLACES=109, PETRI_TRANSITIONS=74} [2024-06-27 21:55:03,885 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 71 predicate places. [2024-06-27 21:55:03,885 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 74 transitions, 491 flow [2024-06-27 21:55:03,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:03,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:03,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:03,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:55:03,886 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:03,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1691577065, now seen corresponding path program 6 times [2024-06-27 21:55:03,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:03,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778248889] [2024-06-27 21:55:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:03,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:03,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:03,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778248889] [2024-06-27 21:55:03,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778248889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:03,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:03,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:03,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921225515] [2024-06-27 21:55:03,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:03,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:03,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:03,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:03,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:04,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:04,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 74 transitions, 491 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:04,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:04,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:04,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:04,125 INFO L124 PetriNetUnfolderBase]: 374/885 cut-off events. [2024-06-27 21:55:04,125 INFO L125 PetriNetUnfolderBase]: For 8829/8832 co-relation queries the response was YES. [2024-06-27 21:55:04,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 885 events. 374/885 cut-off events. For 8829/8832 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5832 event pairs, 200 based on Foata normal form. 8/848 useless extension candidates. Maximal degree in co-relation 2563. Up to 577 conditions per place. [2024-06-27 21:55:04,129 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 49 selfloop transitions, 30 changer transitions 0/92 dead transitions. [2024-06-27 21:55:04,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 92 transitions, 701 flow [2024-06-27 21:55:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 21:55:04,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6284722222222222 [2024-06-27 21:55:04,131 INFO L175 Difference]: Start difference. First operand has 109 places, 74 transitions, 491 flow. Second operand 8 states and 181 transitions. [2024-06-27 21:55:04,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 92 transitions, 701 flow [2024-06-27 21:55:04,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 92 transitions, 644 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:04,145 INFO L231 Difference]: Finished difference. Result has 111 places, 74 transitions, 498 flow [2024-06-27 21:55:04,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=498, PETRI_PLACES=111, PETRI_TRANSITIONS=74} [2024-06-27 21:55:04,146 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2024-06-27 21:55:04,146 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 74 transitions, 498 flow [2024-06-27 21:55:04,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:04,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:04,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:04,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:55:04,147 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:04,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1682999241, now seen corresponding path program 1 times [2024-06-27 21:55:04,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:04,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202653201] [2024-06-27 21:55:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:04,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:04,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:04,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202653201] [2024-06-27 21:55:04,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202653201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:04,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:04,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:04,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416036752] [2024-06-27 21:55:04,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:04,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:04,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:04,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:04,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:04,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 74 transitions, 498 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:04,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:04,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:04,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:04,379 INFO L124 PetriNetUnfolderBase]: 396/936 cut-off events. [2024-06-27 21:55:04,380 INFO L125 PetriNetUnfolderBase]: For 8295/8301 co-relation queries the response was YES. [2024-06-27 21:55:04,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2748 conditions, 936 events. 396/936 cut-off events. For 8295/8301 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6313 event pairs, 194 based on Foata normal form. 6/895 useless extension candidates. Maximal degree in co-relation 2702. Up to 421 conditions per place. [2024-06-27 21:55:04,384 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 54 selfloop transitions, 30 changer transitions 0/97 dead transitions. [2024-06-27 21:55:04,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 97 transitions, 736 flow [2024-06-27 21:55:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 21:55:04,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423611111111112 [2024-06-27 21:55:04,385 INFO L175 Difference]: Start difference. First operand has 111 places, 74 transitions, 498 flow. Second operand 8 states and 185 transitions. [2024-06-27 21:55:04,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 97 transitions, 736 flow [2024-06-27 21:55:04,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 97 transitions, 678 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:04,402 INFO L231 Difference]: Finished difference. Result has 113 places, 74 transitions, 503 flow [2024-06-27 21:55:04,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=503, PETRI_PLACES=113, PETRI_TRANSITIONS=74} [2024-06-27 21:55:04,403 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2024-06-27 21:55:04,415 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 74 transitions, 503 flow [2024-06-27 21:55:04,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:04,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:04,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:04,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:55:04,416 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:04,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:04,417 INFO L85 PathProgramCache]: Analyzing trace with hash -621922851, now seen corresponding path program 7 times [2024-06-27 21:55:04,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:04,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727021550] [2024-06-27 21:55:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:04,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:04,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:04,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727021550] [2024-06-27 21:55:04,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727021550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:04,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:04,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:04,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694849857] [2024-06-27 21:55:04,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:04,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:04,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:04,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:04,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:04,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:04,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 74 transitions, 503 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:04,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:04,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:04,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:04,647 INFO L124 PetriNetUnfolderBase]: 428/1009 cut-off events. [2024-06-27 21:55:04,647 INFO L125 PetriNetUnfolderBase]: For 10031/10037 co-relation queries the response was YES. [2024-06-27 21:55:04,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2952 conditions, 1009 events. 428/1009 cut-off events. For 10031/10037 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7028 event pairs, 250 based on Foata normal form. 8/962 useless extension candidates. Maximal degree in co-relation 2905. Up to 687 conditions per place. [2024-06-27 21:55:04,651 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 47 selfloop transitions, 29 changer transitions 0/89 dead transitions. [2024-06-27 21:55:04,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 89 transitions, 699 flow [2024-06-27 21:55:04,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 21:55:04,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6215277777777778 [2024-06-27 21:55:04,652 INFO L175 Difference]: Start difference. First operand has 113 places, 74 transitions, 503 flow. Second operand 8 states and 179 transitions. [2024-06-27 21:55:04,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 89 transitions, 699 flow [2024-06-27 21:55:04,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 89 transitions, 640 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:04,670 INFO L231 Difference]: Finished difference. Result has 115 places, 74 transitions, 506 flow [2024-06-27 21:55:04,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=506, PETRI_PLACES=115, PETRI_TRANSITIONS=74} [2024-06-27 21:55:04,670 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2024-06-27 21:55:04,670 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 74 transitions, 506 flow [2024-06-27 21:55:04,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:04,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:04,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:04,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:55:04,671 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:04,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:04,671 INFO L85 PathProgramCache]: Analyzing trace with hash -124742377, now seen corresponding path program 8 times [2024-06-27 21:55:04,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:04,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197914131] [2024-06-27 21:55:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:04,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:04,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:04,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197914131] [2024-06-27 21:55:04,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197914131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:04,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:04,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:04,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972213902] [2024-06-27 21:55:04,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:04,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:04,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:04,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:04,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:04,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:04,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 74 transitions, 506 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:04,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:04,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:04,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:04,897 INFO L124 PetriNetUnfolderBase]: 460/1086 cut-off events. [2024-06-27 21:55:04,898 INFO L125 PetriNetUnfolderBase]: For 10649/10655 co-relation queries the response was YES. [2024-06-27 21:55:04,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3147 conditions, 1086 events. 460/1086 cut-off events. For 10649/10655 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7680 event pairs, 276 based on Foata normal form. 8/1035 useless extension candidates. Maximal degree in co-relation 3099. Up to 751 conditions per place. [2024-06-27 21:55:04,902 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 46 selfloop transitions, 30 changer transitions 0/89 dead transitions. [2024-06-27 21:55:04,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 89 transitions, 702 flow [2024-06-27 21:55:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-27 21:55:04,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2024-06-27 21:55:04,903 INFO L175 Difference]: Start difference. First operand has 115 places, 74 transitions, 506 flow. Second operand 8 states and 178 transitions. [2024-06-27 21:55:04,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 89 transitions, 702 flow [2024-06-27 21:55:04,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 89 transitions, 646 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:04,921 INFO L231 Difference]: Finished difference. Result has 117 places, 74 transitions, 514 flow [2024-06-27 21:55:04,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=514, PETRI_PLACES=117, PETRI_TRANSITIONS=74} [2024-06-27 21:55:04,922 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 79 predicate places. [2024-06-27 21:55:04,922 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 74 transitions, 514 flow [2024-06-27 21:55:04,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:04,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:04,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:04,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:55:04,923 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:04,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 3748739, now seen corresponding path program 9 times [2024-06-27 21:55:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:04,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598162564] [2024-06-27 21:55:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:05,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:05,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598162564] [2024-06-27 21:55:05,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598162564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:05,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:05,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:05,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58222657] [2024-06-27 21:55:05,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:05,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:05,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:05,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:05,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:05,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:05,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 74 transitions, 514 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:05,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:05,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:05,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:05,161 INFO L124 PetriNetUnfolderBase]: 511/1201 cut-off events. [2024-06-27 21:55:05,162 INFO L125 PetriNetUnfolderBase]: For 13821/13830 co-relation queries the response was YES. [2024-06-27 21:55:05,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 1201 events. 511/1201 cut-off events. For 13821/13830 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8753 event pairs, 295 based on Foata normal form. 6/1143 useless extension candidates. Maximal degree in co-relation 3607. Up to 636 conditions per place. [2024-06-27 21:55:05,167 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 52 selfloop transitions, 30 changer transitions 0/95 dead transitions. [2024-06-27 21:55:05,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 95 transitions, 812 flow [2024-06-27 21:55:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 21:55:05,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-27 21:55:05,168 INFO L175 Difference]: Start difference. First operand has 117 places, 74 transitions, 514 flow. Second operand 8 states and 183 transitions. [2024-06-27 21:55:05,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 95 transitions, 812 flow [2024-06-27 21:55:05,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 95 transitions, 754 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:05,193 INFO L231 Difference]: Finished difference. Result has 119 places, 74 transitions, 519 flow [2024-06-27 21:55:05,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=519, PETRI_PLACES=119, PETRI_TRANSITIONS=74} [2024-06-27 21:55:05,194 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2024-06-27 21:55:05,194 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 74 transitions, 519 flow [2024-06-27 21:55:05,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:05,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:05,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:05,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:55:05,195 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:05,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:05,195 INFO L85 PathProgramCache]: Analyzing trace with hash -492329469, now seen corresponding path program 10 times [2024-06-27 21:55:05,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:05,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369339299] [2024-06-27 21:55:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:05,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:05,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:05,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369339299] [2024-06-27 21:55:05,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369339299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:05,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:05,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:05,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169976687] [2024-06-27 21:55:05,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:05,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:05,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:05,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:05,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:05,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 74 transitions, 519 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:05,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:05,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:05,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:05,464 INFO L124 PetriNetUnfolderBase]: 501/1187 cut-off events. [2024-06-27 21:55:05,464 INFO L125 PetriNetUnfolderBase]: For 10495/10504 co-relation queries the response was YES. [2024-06-27 21:55:05,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3343 conditions, 1187 events. 501/1187 cut-off events. For 10495/10504 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8621 event pairs, 303 based on Foata normal form. 8/1134 useless extension candidates. Maximal degree in co-relation 3293. Up to 892 conditions per place. [2024-06-27 21:55:05,470 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 65 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2024-06-27 21:55:05,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 89 transitions, 715 flow [2024-06-27 21:55:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:05,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 21:55:05,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 21:55:05,475 INFO L175 Difference]: Start difference. First operand has 119 places, 74 transitions, 519 flow. Second operand 8 states and 171 transitions. [2024-06-27 21:55:05,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 89 transitions, 715 flow [2024-06-27 21:55:05,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 89 transitions, 656 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:05,525 INFO L231 Difference]: Finished difference. Result has 121 places, 74 transitions, 486 flow [2024-06-27 21:55:05,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=486, PETRI_PLACES=121, PETRI_TRANSITIONS=74} [2024-06-27 21:55:05,526 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 83 predicate places. [2024-06-27 21:55:05,526 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 74 transitions, 486 flow [2024-06-27 21:55:05,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:05,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:05,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:05,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:55:05,526 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:05,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:05,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1648300549, now seen corresponding path program 2 times [2024-06-27 21:55:05,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:05,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043834203] [2024-06-27 21:55:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:05,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:05,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:05,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043834203] [2024-06-27 21:55:05,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043834203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:05,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:05,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:05,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316917143] [2024-06-27 21:55:05,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:05,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:05,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:05,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:05,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:05,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:05,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 74 transitions, 486 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:05,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:05,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:05,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:05,795 INFO L124 PetriNetUnfolderBase]: 523/1237 cut-off events. [2024-06-27 21:55:05,796 INFO L125 PetriNetUnfolderBase]: For 9495/9504 co-relation queries the response was YES. [2024-06-27 21:55:05,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1237 events. 523/1237 cut-off events. For 9495/9504 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9095 event pairs, 311 based on Foata normal form. 6/1178 useless extension candidates. Maximal degree in co-relation 3389. Up to 750 conditions per place. [2024-06-27 21:55:05,802 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 52 selfloop transitions, 29 changer transitions 0/94 dead transitions. [2024-06-27 21:55:05,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 94 transitions, 710 flow [2024-06-27 21:55:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 21:55:05,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-27 21:55:05,805 INFO L175 Difference]: Start difference. First operand has 121 places, 74 transitions, 486 flow. Second operand 8 states and 183 transitions. [2024-06-27 21:55:05,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 94 transitions, 710 flow [2024-06-27 21:55:05,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 94 transitions, 690 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:05,827 INFO L231 Difference]: Finished difference. Result has 123 places, 74 transitions, 527 flow [2024-06-27 21:55:05,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=527, PETRI_PLACES=123, PETRI_TRANSITIONS=74} [2024-06-27 21:55:05,827 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2024-06-27 21:55:05,827 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 74 transitions, 527 flow [2024-06-27 21:55:05,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:05,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:05,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:05,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:55:05,828 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:05,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1402159015, now seen corresponding path program 3 times [2024-06-27 21:55:05,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:05,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933160019] [2024-06-27 21:55:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:05,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:05,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933160019] [2024-06-27 21:55:05,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933160019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:05,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:05,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900334496] [2024-06-27 21:55:05,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:05,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:05,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:05,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:05,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 74 transitions, 527 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:05,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:05,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:05,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:06,149 INFO L124 PetriNetUnfolderBase]: 545/1307 cut-off events. [2024-06-27 21:55:06,150 INFO L125 PetriNetUnfolderBase]: For 10101/10110 co-relation queries the response was YES. [2024-06-27 21:55:06,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3639 conditions, 1307 events. 545/1307 cut-off events. For 10101/10110 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 9784 event pairs, 335 based on Foata normal form. 6/1250 useless extension candidates. Maximal degree in co-relation 3587. Up to 918 conditions per place. [2024-06-27 21:55:06,155 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 70 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2024-06-27 21:55:06,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 94 transitions, 751 flow [2024-06-27 21:55:06,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:55:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:55:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 21:55:06,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 21:55:06,156 INFO L175 Difference]: Start difference. First operand has 123 places, 74 transitions, 527 flow. Second operand 8 states and 176 transitions. [2024-06-27 21:55:06,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 94 transitions, 751 flow [2024-06-27 21:55:06,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 94 transitions, 694 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:06,175 INFO L231 Difference]: Finished difference. Result has 125 places, 74 transitions, 495 flow [2024-06-27 21:55:06,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=495, PETRI_PLACES=125, PETRI_TRANSITIONS=74} [2024-06-27 21:55:06,175 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 87 predicate places. [2024-06-27 21:55:06,175 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 74 transitions, 495 flow [2024-06-27 21:55:06,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:06,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:06,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:06,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:55:06,176 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:06,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:06,177 INFO L85 PathProgramCache]: Analyzing trace with hash -196864315, now seen corresponding path program 4 times [2024-06-27 21:55:06,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:06,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904085322] [2024-06-27 21:55:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:06,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:06,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:06,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904085322] [2024-06-27 21:55:06,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904085322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:06,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:06,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:06,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266535250] [2024-06-27 21:55:06,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:06,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:55:06,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:06,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:55:06,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:55:06,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 21:55:06,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 74 transitions, 495 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:06,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:06,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 21:55:06,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:06,452 INFO L124 PetriNetUnfolderBase]: 538/1282 cut-off events. [2024-06-27 21:55:06,453 INFO L125 PetriNetUnfolderBase]: For 5823/5832 co-relation queries the response was YES. [2024-06-27 21:55:06,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3334 conditions, 1282 events. 538/1282 cut-off events. For 5823/5832 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9548 event pairs, 312 based on Foata normal form. 6/1227 useless extension candidates. Maximal degree in co-relation 3281. Up to 821 conditions per place. [2024-06-27 21:55:06,459 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 72 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2024-06-27 21:55:06,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 97 transitions, 653 flow [2024-06-27 21:55:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:55:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:55:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-27 21:55:06,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-06-27 21:55:06,460 INFO L175 Difference]: Start difference. First operand has 125 places, 74 transitions, 495 flow. Second operand 9 states and 196 transitions. [2024-06-27 21:55:06,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 97 transitions, 653 flow [2024-06-27 21:55:06,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 97 transitions, 524 flow, removed 8 selfloop flow, removed 46 redundant places. [2024-06-27 21:55:06,465 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 318 flow [2024-06-27 21:55:06,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=318, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2024-06-27 21:55:06,466 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2024-06-27 21:55:06,466 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 318 flow [2024-06-27 21:55:06,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:06,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:06,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:06,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:55:06,467 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:06,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash -389926156, now seen corresponding path program 1 times [2024-06-27 21:55:06,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949679861] [2024-06-27 21:55:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:06,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:06,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:06,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949679861] [2024-06-27 21:55:06,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949679861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:06,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:06,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:55:06,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934985926] [2024-06-27 21:55:06,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:06,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:55:06,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:06,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:55:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:55:06,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 36 [2024-06-27 21:55:06,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 73 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:06,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:06,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 36 [2024-06-27 21:55:06,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:06,607 INFO L124 PetriNetUnfolderBase]: 410/1182 cut-off events. [2024-06-27 21:55:06,607 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2024-06-27 21:55:06,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 1182 events. 410/1182 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8652 event pairs, 20 based on Foata normal form. 96/1226 useless extension candidates. Maximal degree in co-relation 2419. Up to 344 conditions per place. [2024-06-27 21:55:06,610 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 18 selfloop transitions, 24 changer transitions 1/83 dead transitions. [2024-06-27 21:55:06,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 83 transitions, 427 flow [2024-06-27 21:55:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:55:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:55:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-27 21:55:06,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-06-27 21:55:06,611 INFO L175 Difference]: Start difference. First operand has 86 places, 73 transitions, 318 flow. Second operand 5 states and 132 transitions. [2024-06-27 21:55:06,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 83 transitions, 427 flow [2024-06-27 21:55:06,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 404 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:55:06,612 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 372 flow [2024-06-27 21:55:06,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2024-06-27 21:55:06,614 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2024-06-27 21:55:06,614 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 372 flow [2024-06-27 21:55:06,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:06,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:06,614 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] [2024-06-27 21:55:06,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:55:06,615 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:06,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:06,615 INFO L85 PathProgramCache]: Analyzing trace with hash 83925683, now seen corresponding path program 1 times [2024-06-27 21:55:06,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:06,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167006419] [2024-06-27 21:55:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:06,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:06,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:06,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167006419] [2024-06-27 21:55:06,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167006419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:06,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:06,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:55:06,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341794888] [2024-06-27 21:55:06,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:06,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:55:06,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:06,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:55:06,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:55:06,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2024-06-27 21:55:06,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 372 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:06,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:06,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2024-06-27 21:55:06,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:06,860 INFO L124 PetriNetUnfolderBase]: 303/869 cut-off events. [2024-06-27 21:55:06,860 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2024-06-27 21:55:06,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2100 conditions, 869 events. 303/869 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5873 event pairs, 96 based on Foata normal form. 44/833 useless extension candidates. Maximal degree in co-relation 2084. Up to 259 conditions per place. [2024-06-27 21:55:06,862 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 15 selfloop transitions, 3 changer transitions 50/88 dead transitions. [2024-06-27 21:55:06,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 88 transitions, 494 flow [2024-06-27 21:55:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:55:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:55:06,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 21:55:06,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-06-27 21:55:06,863 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 372 flow. Second operand 7 states and 165 transitions. [2024-06-27 21:55:06,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 88 transitions, 494 flow [2024-06-27 21:55:06,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 88 transitions, 388 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:06,866 INFO L231 Difference]: Finished difference. Result has 88 places, 36 transitions, 120 flow [2024-06-27 21:55:06,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=120, PETRI_PLACES=88, PETRI_TRANSITIONS=36} [2024-06-27 21:55:06,866 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2024-06-27 21:55:06,866 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 36 transitions, 120 flow [2024-06-27 21:55:06,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:06,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:55:06,866 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] [2024-06-27 21:55:06,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:55:06,867 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:55:06,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:55:06,867 INFO L85 PathProgramCache]: Analyzing trace with hash -859301177, now seen corresponding path program 2 times [2024-06-27 21:55:06,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:55:06,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521850980] [2024-06-27 21:55:06,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:55:06,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:55:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:55:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:55:06,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:55:06,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521850980] [2024-06-27 21:55:06,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521850980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:55:06,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:55:06,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:55:06,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946919718] [2024-06-27 21:55:06,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:55:06,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:55:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:55:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:55:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:55:06,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2024-06-27 21:55:06,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 36 transitions, 120 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:06,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:55:06,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2024-06-27 21:55:06,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:55:07,033 INFO L124 PetriNetUnfolderBase]: 65/195 cut-off events. [2024-06-27 21:55:07,033 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-27 21:55:07,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 195 events. 65/195 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 759 event pairs, 10 based on Foata normal form. 12/190 useless extension candidates. Maximal degree in co-relation 414. Up to 73 conditions per place. [2024-06-27 21:55:07,034 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 0 selfloop transitions, 0 changer transitions 41/41 dead transitions. [2024-06-27 21:55:07,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 41 transitions, 174 flow [2024-06-27 21:55:07,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:55:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:55:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 21:55:07,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 21:55:07,035 INFO L175 Difference]: Start difference. First operand has 88 places, 36 transitions, 120 flow. Second operand 6 states and 136 transitions. [2024-06-27 21:55:07,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 41 transitions, 174 flow [2024-06-27 21:55:07,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 41 transitions, 162 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:55:07,036 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2024-06-27 21:55:07,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2024-06-27 21:55:07,037 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2024-06-27 21:55:07,037 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2024-06-27 21:55:07,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:55:07,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-06-27 21:55:07,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-06-27 21:55:07,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 21:55:07,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-06-27 21:55:07,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-06-27 21:55:07,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:55:07,041 INFO L445 BasicCegarLoop]: Path program histogram: [10, 6, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:55:07,047 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 21:55:07,047 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 21:55:07,050 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 21:55:07,050 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 21:55:07,052 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 09:55:07 BasicIcfg [2024-06-27 21:55:07,052 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 21:55:07,052 INFO L158 Benchmark]: Toolchain (without parser) took 12236.82ms. Allocated memory was 125.8MB in the beginning and 419.4MB in the end (delta: 293.6MB). Free memory was 51.7MB in the beginning and 262.1MB in the end (delta: -210.4MB). Peak memory consumption was 83.5MB. Max. memory is 16.1GB. [2024-06-27 21:55:07,052 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 21:55:07,053 INFO L158 Benchmark]: Witness Parser took 0.12ms. Allocated memory is still 125.8MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 21:55:07,053 INFO L158 Benchmark]: CACSL2BoogieTranslator took 472.34ms. Allocated memory was 125.8MB in the beginning and 180.4MB in the end (delta: 54.5MB). Free memory was 51.4MB in the beginning and 137.6MB in the end (delta: -86.2MB). Peak memory consumption was 20.5MB. Max. memory is 16.1GB. [2024-06-27 21:55:07,053 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.39ms. Allocated memory is still 180.4MB. Free memory was 137.6MB in the beginning and 135.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 21:55:07,053 INFO L158 Benchmark]: Boogie Preprocessor took 40.03ms. Allocated memory is still 180.4MB. Free memory was 135.5MB in the beginning and 133.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 21:55:07,054 INFO L158 Benchmark]: RCFGBuilder took 346.19ms. Allocated memory is still 180.4MB. Free memory was 133.4MB in the beginning and 113.7MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-06-27 21:55:07,054 INFO L158 Benchmark]: TraceAbstraction took 11343.59ms. Allocated memory was 180.4MB in the beginning and 419.4MB in the end (delta: 239.1MB). Free memory was 112.4MB in the beginning and 262.1MB in the end (delta: -149.6MB). Peak memory consumption was 88.2MB. Max. memory is 16.1GB. [2024-06-27 21:55:07,057 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.12ms. Allocated memory is still 125.8MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 472.34ms. Allocated memory was 125.8MB in the beginning and 180.4MB in the end (delta: 54.5MB). Free memory was 51.4MB in the beginning and 137.6MB in the end (delta: -86.2MB). Peak memory consumption was 20.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.39ms. Allocated memory is still 180.4MB. Free memory was 137.6MB in the beginning and 135.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.03ms. Allocated memory is still 180.4MB. Free memory was 135.5MB in the beginning and 133.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 346.19ms. Allocated memory is still 180.4MB. Free memory was 133.4MB in the beginning and 113.7MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 11343.59ms. Allocated memory was 180.4MB in the beginning and 419.4MB in the end (delta: 239.1MB). Free memory was 112.4MB in the beginning and 262.1MB in the end (delta: -149.6MB). Peak memory consumption was 88.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 767]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 768]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 54 locations, 5 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: 11.2s, OverallIterations: 45, TraceHistogramMax: 1, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2111 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1603 mSDsluCounter, 512 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 316 mSDsCounter, 206 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7074 IncrementalHoareTripleChecker+Invalid, 7280 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 206 mSolverCounterUnsat, 196 mSDtfsCounter, 7074 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 287 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=550occurred in iteration=23, InterpolantAutomatonStates: 305, 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, 4.3s InterpolantComputationTime, 721 NumberOfCodeBlocks, 721 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 676 ConstructedInterpolants, 0 QuantifiedInterpolants, 5978 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 45 InterpolantComputations, 45 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 21:55:07,095 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