./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe017_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe017_tso.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/safe017_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe017_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:52:55,322 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:52:55,392 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:52:55,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:52:55,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:52:55,427 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:52:55,428 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:52:55,428 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:52:55,428 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:52:55,431 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:52:55,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:52:55,432 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:52:55,433 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:52:55,434 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:52:55,434 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:52:55,434 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:52:55,434 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:52:55,434 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:52:55,435 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:52:55,435 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:52:55,435 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:52:55,435 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:52:55,436 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:52:55,436 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:52:55,436 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:52:55,436 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:52:55,436 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:52:55,437 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:52:55,437 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:52:55,437 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:52:55,438 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:52:55,438 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:52:55,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:52:55,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:52:55,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:52:55,439 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:52:55,439 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:52:55,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:52:55,440 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:52:55,440 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:52:55,440 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:52:55,440 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:52:55,440 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:52:55,441 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:52:55,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:52:55,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:52:55,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:52:55,685 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:52:55,686 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:52:55,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe017_tso.i [2024-06-27 17:52:56,639 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:52:56,860 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:52:56,862 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_tso.i [2024-06-27 17:52:56,874 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a22cef12/3fc7931a77c84e1189554aa4dc436a92/FLAG8e994475b [2024-06-27 17:52:56,888 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a22cef12/3fc7931a77c84e1189554aa4dc436a92 [2024-06-27 17:52:56,890 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:52:56,891 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:52:56,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe017_tso.yml/witness.yml [2024-06-27 17:52:57,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:52:57,006 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:52:57,007 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:52:57,007 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:52:57,010 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:52:57,011 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:52:56" (1/2) ... [2024-06-27 17:52:57,012 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a3d02dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:57, skipping insertion in model container [2024-06-27 17:52:57,012 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:52:56" (1/2) ... [2024-06-27 17:52:57,013 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@229c1d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:57, skipping insertion in model container [2024-06-27 17:52:57,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:52:57" (2/2) ... [2024-06-27 17:52:57,014 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a3d02dc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57, skipping insertion in model container [2024-06-27 17:52:57,014 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:52:57" (2/2) ... [2024-06-27 17:52:57,015 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:52:57,040 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:52:57,041 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] (((! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 17:52:57,041 INFO L97 edCorrectnessWitness]: Location invariant before [L777-L777] (((! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 17:52:57,052 INFO L97 edCorrectnessWitness]: Location invariant before [L774-L774] (((! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 17:52:57,052 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:52:57,052 INFO L106 edCorrectnessWitness]: ghost_update [L772-L772] multithreaded = 1; [2024-06-27 17:52:57,127 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:52:57,249 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/safe017_tso.i[945,958] [2024-06-27 17:52:57,364 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:52:57,370 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:52:57,395 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/safe017_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:52:57,442 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:52:57,470 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:52:57,470 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57 WrapperNode [2024-06-27 17:52:57,470 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:52:57,472 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:52:57,472 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:52:57,472 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:52:57,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,491 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,506 INFO L138 Inliner]: procedures = 175, calls = 39, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-06-27 17:52:57,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:52:57,508 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:52:57,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:52:57,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:52:57,515 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,526 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,541 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:52:57,543 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,543 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,557 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,558 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,564 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,565 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:52:57,566 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:52:57,566 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:52:57,566 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:52:57,567 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (1/1) ... [2024-06-27 17:52:57,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:52:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:52:57,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:52:57,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:52:57,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:52:57,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:52:57,632 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:52:57,632 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:52:57,633 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:52:57,633 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:52:57,633 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:52:57,633 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:52:57,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:52:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:52:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:52:57,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:52:57,635 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:52:57,751 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:52:57,770 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:52:57,934 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:52:57,934 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:52:58,009 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:52:58,010 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:52:58,010 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:52:58 BoogieIcfgContainer [2024-06-27 17:52:58,010 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:52:58,012 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:52:58,012 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:52:58,014 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:52:58,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:52:56" (1/4) ... [2024-06-27 17:52:58,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a11de96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:52:58, skipping insertion in model container [2024-06-27 17:52:58,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:52:57" (2/4) ... [2024-06-27 17:52:58,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a11de96 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:52:58, skipping insertion in model container [2024-06-27 17:52:58,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:57" (3/4) ... [2024-06-27 17:52:58,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a11de96 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:52:58, skipping insertion in model container [2024-06-27 17:52:58,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:52:58" (4/4) ... [2024-06-27 17:52:58,016 INFO L112 eAbstractionObserver]: Analyzing ICFG safe017_tso.i [2024-06-27 17:52:58,029 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:52:58,030 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:52:58,030 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:52:58,068 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:52:58,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 44 transitions, 100 flow [2024-06-27 17:52:58,123 INFO L124 PetriNetUnfolderBase]: 1/41 cut-off events. [2024-06-27 17:52:58,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:52:58,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 1/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-06-27 17:52:58,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 44 transitions, 100 flow [2024-06-27 17:52:58,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 38 transitions, 85 flow [2024-06-27 17:52:58,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:52:58,147 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;@4e1b6adb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:52:58,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:52:58,150 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:52:58,150 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:52:58,150 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:52:58,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:58,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:52:58,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:58,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:58,155 INFO L85 PathProgramCache]: Analyzing trace with hash 203349879, now seen corresponding path program 1 times [2024-06-27 17:52:58,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:58,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234400507] [2024-06-27 17:52:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:58,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:58,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:58,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234400507] [2024-06-27 17:52:58,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234400507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:58,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:58,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:52:58,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67594314] [2024-06-27 17:52:58,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:58,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:52:58,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:52:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:52:58,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-27 17:52:58,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 85 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 17:52:58,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:58,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-27 17:52:58,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:58,634 INFO L124 PetriNetUnfolderBase]: 975/1627 cut-off events. [2024-06-27 17:52:58,635 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-27 17:52:58,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3157 conditions, 1627 events. 975/1627 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9105 event pairs, 719 based on Foata normal form. 1/1573 useless extension candidates. Maximal degree in co-relation 3145. Up to 1463 conditions per place. [2024-06-27 17:52:58,647 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-06-27 17:52:58,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 187 flow [2024-06-27 17:52:58,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:52:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:52:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-27 17:52:58,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-06-27 17:52:58,657 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 85 flow. Second operand 3 states and 93 transitions. [2024-06-27 17:52:58,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 187 flow [2024-06-27 17:52:58,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:58,661 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 112 flow [2024-06-27 17:52:58,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 17:52:58,665 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2024-06-27 17:52:58,665 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 112 flow [2024-06-27 17:52:58,666 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 17:52:58,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:58,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:58,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:52:58,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:58,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2145727766, now seen corresponding path program 1 times [2024-06-27 17:52:58,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:58,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311095285] [2024-06-27 17:52:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:58,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:58,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:58,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311095285] [2024-06-27 17:52:58,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311095285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:58,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:58,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:52:58,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658954422] [2024-06-27 17:52:58,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:58,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:52:58,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:58,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:52:58,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:52:58,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-27 17:52:58,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:58,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:58,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-27 17:52:58,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:59,034 INFO L124 PetriNetUnfolderBase]: 982/1801 cut-off events. [2024-06-27 17:52:59,035 INFO L125 PetriNetUnfolderBase]: For 297/305 co-relation queries the response was YES. [2024-06-27 17:52:59,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3776 conditions, 1801 events. 982/1801 cut-off events. For 297/305 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10536 event pairs, 603 based on Foata normal form. 7/1766 useless extension candidates. Maximal degree in co-relation 3764. Up to 1429 conditions per place. [2024-06-27 17:52:59,048 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 43 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-27 17:52:59,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 292 flow [2024-06-27 17:52:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:52:59,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:52:59,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 17:52:59,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7215909090909091 [2024-06-27 17:52:59,051 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 112 flow. Second operand 4 states and 127 transitions. [2024-06-27 17:52:59,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 292 flow [2024-06-27 17:52:59,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:52:59,054 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 184 flow [2024-06-27 17:52:59,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-06-27 17:52:59,055 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2024-06-27 17:52:59,055 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 184 flow [2024-06-27 17:52:59,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:59,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:59,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:59,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:52:59,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:59,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:59,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2093052066, now seen corresponding path program 1 times [2024-06-27 17:52:59,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:59,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463386771] [2024-06-27 17:52:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:59,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:59,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463386771] [2024-06-27 17:52:59,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463386771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:59,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:59,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:52:59,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983731966] [2024-06-27 17:52:59,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:59,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:52:59,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:59,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:52:59,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:52:59,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:52:59,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:59,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:59,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:52:59,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:59,378 INFO L124 PetriNetUnfolderBase]: 1225/1993 cut-off events. [2024-06-27 17:52:59,379 INFO L125 PetriNetUnfolderBase]: For 1181/1181 co-relation queries the response was YES. [2024-06-27 17:52:59,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5145 conditions, 1993 events. 1225/1993 cut-off events. For 1181/1181 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11103 event pairs, 427 based on Foata normal form. 5/1987 useless extension candidates. Maximal degree in co-relation 5130. Up to 1712 conditions per place. [2024-06-27 17:52:59,390 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 68 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-27 17:52:59,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 95 transitions, 497 flow [2024-06-27 17:52:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-27 17:52:59,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7136363636363636 [2024-06-27 17:52:59,394 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 184 flow. Second operand 5 states and 157 transitions. [2024-06-27 17:52:59,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 95 transitions, 497 flow [2024-06-27 17:52:59,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 95 transitions, 491 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 17:52:59,400 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 294 flow [2024-06-27 17:52:59,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-06-27 17:52:59,401 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 11 predicate places. [2024-06-27 17:52:59,401 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 294 flow [2024-06-27 17:52:59,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:59,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:59,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:59,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:52:59,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:59,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:59,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1378366241, now seen corresponding path program 1 times [2024-06-27 17:52:59,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:59,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834612745] [2024-06-27 17:52:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:59,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:59,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:59,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834612745] [2024-06-27 17:52:59,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834612745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:59,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:59,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:59,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253432673] [2024-06-27 17:52:59,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:59,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:59,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:59,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:59,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:59,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:52:59,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:59,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:59,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:52:59,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:59,728 INFO L124 PetriNetUnfolderBase]: 1322/2216 cut-off events. [2024-06-27 17:52:59,728 INFO L125 PetriNetUnfolderBase]: For 2616/2616 co-relation queries the response was YES. [2024-06-27 17:52:59,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6545 conditions, 2216 events. 1322/2216 cut-off events. For 2616/2616 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12889 event pairs, 417 based on Foata normal form. 22/2213 useless extension candidates. Maximal degree in co-relation 6525. Up to 1681 conditions per place. [2024-06-27 17:52:59,740 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 77 selfloop transitions, 16 changer transitions 0/106 dead transitions. [2024-06-27 17:52:59,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 106 transitions, 620 flow [2024-06-27 17:52:59,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 17:52:59,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7007575757575758 [2024-06-27 17:52:59,741 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 294 flow. Second operand 6 states and 185 transitions. [2024-06-27 17:52:59,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 106 transitions, 620 flow [2024-06-27 17:52:59,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 106 transitions, 616 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 17:52:59,745 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 338 flow [2024-06-27 17:52:59,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-27 17:52:59,746 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 16 predicate places. [2024-06-27 17:52:59,746 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 338 flow [2024-06-27 17:52:59,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:59,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:59,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:59,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:52:59,747 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:59,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:59,748 INFO L85 PathProgramCache]: Analyzing trace with hash 936121340, now seen corresponding path program 1 times [2024-06-27 17:52:59,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:59,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305407892] [2024-06-27 17:52:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:59,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:59,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:59,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305407892] [2024-06-27 17:52:59,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305407892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:59,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:59,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:52:59,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170877700] [2024-06-27 17:52:59,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:59,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:52:59,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:59,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:52:59,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:52:59,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:52:59,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 338 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 17:52:59,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:59,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:52:59,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:00,030 INFO L124 PetriNetUnfolderBase]: 1317/2129 cut-off events. [2024-06-27 17:53:00,030 INFO L125 PetriNetUnfolderBase]: For 3299/3299 co-relation queries the response was YES. [2024-06-27 17:53:00,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6926 conditions, 2129 events. 1317/2129 cut-off events. For 3299/3299 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11871 event pairs, 379 based on Foata normal form. 2/2126 useless extension candidates. Maximal degree in co-relation 6903. Up to 1962 conditions per place. [2024-06-27 17:53:00,042 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 60 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-06-27 17:53:00,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 522 flow [2024-06-27 17:53:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:53:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:53:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-27 17:53:00,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6534090909090909 [2024-06-27 17:53:00,047 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 338 flow. Second operand 4 states and 115 transitions. [2024-06-27 17:53:00,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 522 flow [2024-06-27 17:53:00,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 486 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:00,052 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 344 flow [2024-06-27 17:53:00,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-06-27 17:53:00,052 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 17 predicate places. [2024-06-27 17:53:00,053 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 344 flow [2024-06-27 17:53:00,053 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 17:53:00,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:00,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:00,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:53:00,053 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:00,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:00,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1392205317, now seen corresponding path program 1 times [2024-06-27 17:53:00,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:00,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283968624] [2024-06-27 17:53:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:00,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:00,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:00,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283968624] [2024-06-27 17:53:00,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283968624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:00,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:00,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:53:00,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117639416] [2024-06-27 17:53:00,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:00,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:53:00,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:00,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:53:00,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:53:00,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:00,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:00,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:00,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:00,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:00,325 INFO L124 PetriNetUnfolderBase]: 1329/2167 cut-off events. [2024-06-27 17:53:00,325 INFO L125 PetriNetUnfolderBase]: For 3671/3671 co-relation queries the response was YES. [2024-06-27 17:53:00,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6984 conditions, 2167 events. 1329/2167 cut-off events. For 3671/3671 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12177 event pairs, 391 based on Foata normal form. 4/2160 useless extension candidates. Maximal degree in co-relation 6959. Up to 1878 conditions per place. [2024-06-27 17:53:00,337 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 65 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-06-27 17:53:00,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 95 transitions, 613 flow [2024-06-27 17:53:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 17:53:00,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-06-27 17:53:00,339 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 344 flow. Second operand 5 states and 150 transitions. [2024-06-27 17:53:00,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 95 transitions, 613 flow [2024-06-27 17:53:00,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 95 transitions, 597 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:53:00,344 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 409 flow [2024-06-27 17:53:00,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=409, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-27 17:53:00,346 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 21 predicate places. [2024-06-27 17:53:00,346 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 409 flow [2024-06-27 17:53:00,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:00,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:00,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:00,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:53:00,347 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:00,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:00,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1964451803, now seen corresponding path program 2 times [2024-06-27 17:53:00,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:00,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816903648] [2024-06-27 17:53:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:00,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:00,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:00,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816903648] [2024-06-27 17:53:00,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816903648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:00,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:00,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:53:00,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403219182] [2024-06-27 17:53:00,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:00,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:53:00,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:00,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:53:00,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:53:00,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:00,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 409 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:00,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:00,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:00,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:00,614 INFO L124 PetriNetUnfolderBase]: 1309/2114 cut-off events. [2024-06-27 17:53:00,614 INFO L125 PetriNetUnfolderBase]: For 4419/4425 co-relation queries the response was YES. [2024-06-27 17:53:00,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7131 conditions, 2114 events. 1309/2114 cut-off events. For 4419/4425 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11625 event pairs, 369 based on Foata normal form. 3/2104 useless extension candidates. Maximal degree in co-relation 7104. Up to 1842 conditions per place. [2024-06-27 17:53:00,626 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 59 selfloop transitions, 19 changer transitions 0/91 dead transitions. [2024-06-27 17:53:00,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 91 transitions, 623 flow [2024-06-27 17:53:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 17:53:00,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-06-27 17:53:00,627 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 409 flow. Second operand 5 states and 146 transitions. [2024-06-27 17:53:00,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 91 transitions, 623 flow [2024-06-27 17:53:00,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 602 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 17:53:00,633 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 442 flow [2024-06-27 17:53:00,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=442, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-06-27 17:53:00,634 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 24 predicate places. [2024-06-27 17:53:00,634 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 442 flow [2024-06-27 17:53:00,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:00,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:00,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:00,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:53:00,635 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:00,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:00,635 INFO L85 PathProgramCache]: Analyzing trace with hash 647995449, now seen corresponding path program 1 times [2024-06-27 17:53:00,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:00,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788040279] [2024-06-27 17:53:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:00,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:00,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:00,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788040279] [2024-06-27 17:53:00,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788040279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:00,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:00,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:53:00,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140690752] [2024-06-27 17:53:00,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:00,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:53:00,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:00,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:53:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:53:00,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:00,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 442 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:00,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:00,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:00,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:00,913 INFO L124 PetriNetUnfolderBase]: 1301/2102 cut-off events. [2024-06-27 17:53:00,914 INFO L125 PetriNetUnfolderBase]: For 4927/4927 co-relation queries the response was YES. [2024-06-27 17:53:00,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7219 conditions, 2102 events. 1301/2102 cut-off events. For 4927/4927 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11531 event pairs, 321 based on Foata normal form. 4/2101 useless extension candidates. Maximal degree in co-relation 7191. Up to 1901 conditions per place. [2024-06-27 17:53:00,925 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 72 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2024-06-27 17:53:00,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 670 flow [2024-06-27 17:53:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-27 17:53:00,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6409090909090909 [2024-06-27 17:53:00,926 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 442 flow. Second operand 5 states and 141 transitions. [2024-06-27 17:53:00,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 670 flow [2024-06-27 17:53:00,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 643 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:53:00,932 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 458 flow [2024-06-27 17:53:00,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=458, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-06-27 17:53:00,933 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 27 predicate places. [2024-06-27 17:53:00,933 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 458 flow [2024-06-27 17:53:00,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:00,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:00,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:00,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:53:00,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:00,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:00,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1250350888, now seen corresponding path program 1 times [2024-06-27 17:53:00,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:00,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726734729] [2024-06-27 17:53:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:00,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:00,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:00,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726734729] [2024-06-27 17:53:00,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726734729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:00,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:00,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:00,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279313633] [2024-06-27 17:53:00,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:00,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:01,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:01,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 458 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:01,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:01,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:01,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:01,272 INFO L124 PetriNetUnfolderBase]: 1422/2409 cut-off events. [2024-06-27 17:53:01,272 INFO L125 PetriNetUnfolderBase]: For 7183/7183 co-relation queries the response was YES. [2024-06-27 17:53:01,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8090 conditions, 2409 events. 1422/2409 cut-off events. For 7183/7183 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14205 event pairs, 530 based on Foata normal form. 20/2400 useless extension candidates. Maximal degree in co-relation 8060. Up to 1863 conditions per place. [2024-06-27 17:53:01,309 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 75 selfloop transitions, 20 changer transitions 0/108 dead transitions. [2024-06-27 17:53:01,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 746 flow [2024-06-27 17:53:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:01,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:53:01,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6704545454545454 [2024-06-27 17:53:01,310 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 458 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:53:01,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 746 flow [2024-06-27 17:53:01,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 108 transitions, 721 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:01,331 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 499 flow [2024-06-27 17:53:01,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=499, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-06-27 17:53:01,333 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 30 predicate places. [2024-06-27 17:53:01,333 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 499 flow [2024-06-27 17:53:01,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:01,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:01,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:01,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:53:01,333 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:01,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:01,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1947410694, now seen corresponding path program 2 times [2024-06-27 17:53:01,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:01,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895791367] [2024-06-27 17:53:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:01,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:01,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:01,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895791367] [2024-06-27 17:53:01,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895791367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:01,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:01,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:01,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223526450] [2024-06-27 17:53:01,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:01,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:01,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:01,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:01,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:01,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:01,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 499 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:01,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:01,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:01,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:01,619 INFO L124 PetriNetUnfolderBase]: 1449/2434 cut-off events. [2024-06-27 17:53:01,619 INFO L125 PetriNetUnfolderBase]: For 8215/8221 co-relation queries the response was YES. [2024-06-27 17:53:01,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8596 conditions, 2434 events. 1449/2434 cut-off events. For 8215/8221 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14237 event pairs, 589 based on Foata normal form. 5/2408 useless extension candidates. Maximal degree in co-relation 8565. Up to 2036 conditions per place. [2024-06-27 17:53:01,632 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 70 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2024-06-27 17:53:01,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 765 flow [2024-06-27 17:53:01,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 17:53:01,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-06-27 17:53:01,634 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 499 flow. Second operand 6 states and 172 transitions. [2024-06-27 17:53:01,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 765 flow [2024-06-27 17:53:01,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 104 transitions, 721 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:01,647 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 526 flow [2024-06-27 17:53:01,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=526, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-06-27 17:53:01,649 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 32 predicate places. [2024-06-27 17:53:01,649 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 526 flow [2024-06-27 17:53:01,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:01,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:01,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:01,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:53:01,650 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:01,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash -46622504, now seen corresponding path program 3 times [2024-06-27 17:53:01,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:01,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552419627] [2024-06-27 17:53:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:01,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:01,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:01,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552419627] [2024-06-27 17:53:01,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552419627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:01,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:01,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:01,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930120720] [2024-06-27 17:53:01,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:01,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:01,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:01,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:01,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:01,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:01,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 526 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:01,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:01,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:01,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:01,944 INFO L124 PetriNetUnfolderBase]: 1441/2406 cut-off events. [2024-06-27 17:53:01,944 INFO L125 PetriNetUnfolderBase]: For 9102/9108 co-relation queries the response was YES. [2024-06-27 17:53:01,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8634 conditions, 2406 events. 1441/2406 cut-off events. For 9102/9108 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14005 event pairs, 475 based on Foata normal form. 5/2382 useless extension candidates. Maximal degree in co-relation 8602. Up to 1807 conditions per place. [2024-06-27 17:53:01,957 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 71 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-27 17:53:01,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 110 transitions, 820 flow [2024-06-27 17:53:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:53:01,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:53:01,958 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 526 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:53:01,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 110 transitions, 820 flow [2024-06-27 17:53:01,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 110 transitions, 767 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:01,968 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 558 flow [2024-06-27 17:53:01,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=558, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2024-06-27 17:53:01,969 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 34 predicate places. [2024-06-27 17:53:01,969 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 558 flow [2024-06-27 17:53:01,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:01,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:01,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:01,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:53:01,970 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:01,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:01,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1848779837, now seen corresponding path program 1 times [2024-06-27 17:53:01,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:01,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784823279] [2024-06-27 17:53:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:01,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:02,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784823279] [2024-06-27 17:53:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784823279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:02,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:02,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:53:02,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094973134] [2024-06-27 17:53:02,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:02,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:53:02,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:53:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:53:02,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:02,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 558 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:02,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:02,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:02,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:02,260 INFO L124 PetriNetUnfolderBase]: 1433/2341 cut-off events. [2024-06-27 17:53:02,261 INFO L125 PetriNetUnfolderBase]: For 9943/9952 co-relation queries the response was YES. [2024-06-27 17:53:02,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8764 conditions, 2341 events. 1433/2341 cut-off events. For 9943/9952 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13253 event pairs, 379 based on Foata normal form. 8/2342 useless extension candidates. Maximal degree in co-relation 8731. Up to 2091 conditions per place. [2024-06-27 17:53:02,273 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 63 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-27 17:53:02,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 90 transitions, 740 flow [2024-06-27 17:53:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:53:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:53:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-27 17:53:02,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6534090909090909 [2024-06-27 17:53:02,274 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 558 flow. Second operand 4 states and 115 transitions. [2024-06-27 17:53:02,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 90 transitions, 740 flow [2024-06-27 17:53:02,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 90 transitions, 673 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:02,284 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 527 flow [2024-06-27 17:53:02,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=527, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2024-06-27 17:53:02,285 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 34 predicate places. [2024-06-27 17:53:02,285 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 527 flow [2024-06-27 17:53:02,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:02,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:02,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:02,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:53:02,286 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:02,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1879168664, now seen corresponding path program 1 times [2024-06-27 17:53:02,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:02,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488522055] [2024-06-27 17:53:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:02,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:02,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:02,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488522055] [2024-06-27 17:53:02,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488522055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:02,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:02,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:02,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487874491] [2024-06-27 17:53:02,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:02,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:02,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:02,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:02,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:02,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 527 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:02,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:02,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:02,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:02,581 INFO L124 PetriNetUnfolderBase]: 1552/2642 cut-off events. [2024-06-27 17:53:02,581 INFO L125 PetriNetUnfolderBase]: For 12692/12692 co-relation queries the response was YES. [2024-06-27 17:53:02,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9513 conditions, 2642 events. 1552/2642 cut-off events. For 12692/12692 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15623 event pairs, 345 based on Foata normal form. 12/2645 useless extension candidates. Maximal degree in co-relation 9479. Up to 1644 conditions per place. [2024-06-27 17:53:02,595 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 85 selfloop transitions, 21 changer transitions 0/119 dead transitions. [2024-06-27 17:53:02,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 909 flow [2024-06-27 17:53:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:53:02,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-06-27 17:53:02,597 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 527 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:53:02,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 909 flow [2024-06-27 17:53:02,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 873 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:02,609 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 569 flow [2024-06-27 17:53:02,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=569, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2024-06-27 17:53:02,610 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 37 predicate places. [2024-06-27 17:53:02,610 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 569 flow [2024-06-27 17:53:02,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:02,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:02,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:02,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:53:02,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:02,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:02,611 INFO L85 PathProgramCache]: Analyzing trace with hash 730106458, now seen corresponding path program 1 times [2024-06-27 17:53:02,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:02,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432198989] [2024-06-27 17:53:02,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:02,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:02,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:02,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432198989] [2024-06-27 17:53:02,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432198989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:02,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:02,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:02,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949721793] [2024-06-27 17:53:02,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:02,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:02,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:02,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:02,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 569 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:02,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:02,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:02,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:02,926 INFO L124 PetriNetUnfolderBase]: 1532/2579 cut-off events. [2024-06-27 17:53:02,926 INFO L125 PetriNetUnfolderBase]: For 13694/13694 co-relation queries the response was YES. [2024-06-27 17:53:02,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9552 conditions, 2579 events. 1532/2579 cut-off events. For 13694/13694 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15292 event pairs, 397 based on Foata normal form. 12/2562 useless extension candidates. Maximal degree in co-relation 9518. Up to 1638 conditions per place. [2024-06-27 17:53:02,940 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 82 selfloop transitions, 22 changer transitions 0/117 dead transitions. [2024-06-27 17:53:02,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 869 flow [2024-06-27 17:53:02,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:53:02,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2024-06-27 17:53:02,942 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 569 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:53:02,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 869 flow [2024-06-27 17:53:02,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 838 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 17:53:02,959 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 589 flow [2024-06-27 17:53:02,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=589, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2024-06-27 17:53:02,960 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 41 predicate places. [2024-06-27 17:53:02,960 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 589 flow [2024-06-27 17:53:02,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:02,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:02,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:02,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:53:02,960 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:02,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:02,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1727709190, now seen corresponding path program 2 times [2024-06-27 17:53:02,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:02,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394350106] [2024-06-27 17:53:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:02,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:03,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:03,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394350106] [2024-06-27 17:53:03,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394350106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:03,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:03,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:03,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726365733] [2024-06-27 17:53:03,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:03,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:03,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:03,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:03,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:03,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:03,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 589 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:03,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:03,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:03,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:03,254 INFO L124 PetriNetUnfolderBase]: 1512/2562 cut-off events. [2024-06-27 17:53:03,254 INFO L125 PetriNetUnfolderBase]: For 13974/13980 co-relation queries the response was YES. [2024-06-27 17:53:03,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9496 conditions, 2562 events. 1512/2562 cut-off events. For 13974/13980 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15300 event pairs, 296 based on Foata normal form. 13/2540 useless extension candidates. Maximal degree in co-relation 9460. Up to 1448 conditions per place. [2024-06-27 17:53:03,268 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 75 selfloop transitions, 23 changer transitions 0/111 dead transitions. [2024-06-27 17:53:03,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 111 transitions, 835 flow [2024-06-27 17:53:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 17:53:03,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2024-06-27 17:53:03,269 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 589 flow. Second operand 6 states and 171 transitions. [2024-06-27 17:53:03,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 111 transitions, 835 flow [2024-06-27 17:53:03,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 111 transitions, 778 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:03,283 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 554 flow [2024-06-27 17:53:03,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=554, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2024-06-27 17:53:03,283 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 41 predicate places. [2024-06-27 17:53:03,283 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 554 flow [2024-06-27 17:53:03,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:03,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:03,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:03,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:53:03,284 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:03,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:03,285 INFO L85 PathProgramCache]: Analyzing trace with hash -278825733, now seen corresponding path program 1 times [2024-06-27 17:53:03,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:03,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797775216] [2024-06-27 17:53:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:03,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:03,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:03,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797775216] [2024-06-27 17:53:03,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797775216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:03,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:03,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:53:03,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233754611] [2024-06-27 17:53:03,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:03,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:53:03,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:53:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:53:03,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:03,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 554 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:03,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:03,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:03,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:03,551 INFO L124 PetriNetUnfolderBase]: 1523/2547 cut-off events. [2024-06-27 17:53:03,552 INFO L125 PetriNetUnfolderBase]: For 13101/13101 co-relation queries the response was YES. [2024-06-27 17:53:03,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9552 conditions, 2547 events. 1523/2547 cut-off events. For 13101/13101 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15019 event pairs, 624 based on Foata normal form. 1/2537 useless extension candidates. Maximal degree in co-relation 9515. Up to 2262 conditions per place. [2024-06-27 17:53:03,564 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 76 selfloop transitions, 15 changer transitions 0/104 dead transitions. [2024-06-27 17:53:03,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 104 transitions, 850 flow [2024-06-27 17:53:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-06-27 17:53:03,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318181818181818 [2024-06-27 17:53:03,565 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 554 flow. Second operand 5 states and 139 transitions. [2024-06-27 17:53:03,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 104 transitions, 850 flow [2024-06-27 17:53:03,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 104 transitions, 781 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:03,578 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 567 flow [2024-06-27 17:53:03,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=567, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2024-06-27 17:53:03,579 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 41 predicate places. [2024-06-27 17:53:03,579 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 567 flow [2024-06-27 17:53:03,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:03,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:03,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:03,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:53:03,580 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:03,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:03,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1987098019, now seen corresponding path program 2 times [2024-06-27 17:53:03,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:03,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674227719] [2024-06-27 17:53:03,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:03,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:03,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:03,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674227719] [2024-06-27 17:53:03,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674227719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:03,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:03,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:53:03,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73657690] [2024-06-27 17:53:03,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:03,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:53:03,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:03,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:53:03,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:53:03,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:03,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 567 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:03,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:03,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:03,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:03,829 INFO L124 PetriNetUnfolderBase]: 1520/2499 cut-off events. [2024-06-27 17:53:03,829 INFO L125 PetriNetUnfolderBase]: For 13569/13569 co-relation queries the response was YES. [2024-06-27 17:53:03,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9323 conditions, 2499 events. 1520/2499 cut-off events. For 13569/13569 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14530 event pairs, 604 based on Foata normal form. 1/2490 useless extension candidates. Maximal degree in co-relation 9286. Up to 2266 conditions per place. [2024-06-27 17:53:03,843 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 75 selfloop transitions, 12 changer transitions 0/100 dead transitions. [2024-06-27 17:53:03,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 100 transitions, 777 flow [2024-06-27 17:53:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:53:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:53:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-27 17:53:03,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6534090909090909 [2024-06-27 17:53:03,845 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 567 flow. Second operand 4 states and 115 transitions. [2024-06-27 17:53:03,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 100 transitions, 777 flow [2024-06-27 17:53:03,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 745 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-27 17:53:03,866 INFO L231 Difference]: Finished difference. Result has 92 places, 85 transitions, 569 flow [2024-06-27 17:53:03,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=569, PETRI_PLACES=92, PETRI_TRANSITIONS=85} [2024-06-27 17:53:03,866 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 44 predicate places. [2024-06-27 17:53:03,866 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 85 transitions, 569 flow [2024-06-27 17:53:03,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:03,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:03,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:03,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:53:03,867 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:03,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:03,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1764416761, now seen corresponding path program 1 times [2024-06-27 17:53:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:03,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993274668] [2024-06-27 17:53:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:03,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:03,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:03,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993274668] [2024-06-27 17:53:03,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993274668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:03,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:03,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547939004] [2024-06-27 17:53:03,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:03,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:03,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:03,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:03,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:03,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:03,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 85 transitions, 569 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:03,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:03,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:03,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:04,180 INFO L124 PetriNetUnfolderBase]: 1612/2660 cut-off events. [2024-06-27 17:53:04,180 INFO L125 PetriNetUnfolderBase]: For 15790/15790 co-relation queries the response was YES. [2024-06-27 17:53:04,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9943 conditions, 2660 events. 1612/2660 cut-off events. For 15790/15790 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15719 event pairs, 399 based on Foata normal form. 2/2645 useless extension candidates. Maximal degree in co-relation 9904. Up to 2070 conditions per place. [2024-06-27 17:53:04,194 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 83 selfloop transitions, 42 changer transitions 0/138 dead transitions. [2024-06-27 17:53:04,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 138 transitions, 1139 flow [2024-06-27 17:53:04,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:53:04,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696969696969697 [2024-06-27 17:53:04,196 INFO L175 Difference]: Start difference. First operand has 92 places, 85 transitions, 569 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:53:04,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 138 transitions, 1139 flow [2024-06-27 17:53:04,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 138 transitions, 1103 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:04,214 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 821 flow [2024-06-27 17:53:04,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=821, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-06-27 17:53:04,215 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 49 predicate places. [2024-06-27 17:53:04,215 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 821 flow [2024-06-27 17:53:04,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:04,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:04,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:04,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:53:04,216 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:04,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:04,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1764147991, now seen corresponding path program 2 times [2024-06-27 17:53:04,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:04,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324631318] [2024-06-27 17:53:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:04,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:04,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:04,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324631318] [2024-06-27 17:53:04,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324631318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:04,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:04,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:04,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061321717] [2024-06-27 17:53:04,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:04,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:04,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:04,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:04,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:04,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 821 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:04,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:04,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:04,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:04,558 INFO L124 PetriNetUnfolderBase]: 1675/2821 cut-off events. [2024-06-27 17:53:04,559 INFO L125 PetriNetUnfolderBase]: For 19148/19148 co-relation queries the response was YES. [2024-06-27 17:53:04,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11811 conditions, 2821 events. 1675/2821 cut-off events. For 19148/19148 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17000 event pairs, 480 based on Foata normal form. 2/2816 useless extension candidates. Maximal degree in co-relation 11769. Up to 2408 conditions per place. [2024-06-27 17:53:04,575 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 102 selfloop transitions, 27 changer transitions 0/142 dead transitions. [2024-06-27 17:53:04,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 142 transitions, 1292 flow [2024-06-27 17:53:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-27 17:53:04,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266233766233766 [2024-06-27 17:53:04,576 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 821 flow. Second operand 7 states and 193 transitions. [2024-06-27 17:53:04,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 142 transitions, 1292 flow [2024-06-27 17:53:04,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 142 transitions, 1246 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-06-27 17:53:04,602 INFO L231 Difference]: Finished difference. Result has 105 places, 114 transitions, 974 flow [2024-06-27 17:53:04,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=974, PETRI_PLACES=105, PETRI_TRANSITIONS=114} [2024-06-27 17:53:04,603 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 57 predicate places. [2024-06-27 17:53:04,603 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 114 transitions, 974 flow [2024-06-27 17:53:04,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:04,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:04,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:04,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:53:04,604 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:04,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1470680377, now seen corresponding path program 3 times [2024-06-27 17:53:04,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:04,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184639290] [2024-06-27 17:53:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:04,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:04,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184639290] [2024-06-27 17:53:04,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184639290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:04,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:04,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:04,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55776649] [2024-06-27 17:53:04,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:04,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:04,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:04,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:04,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:04,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:04,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 114 transitions, 974 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:04,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:04,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:04,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:05,017 INFO L124 PetriNetUnfolderBase]: 1793/2926 cut-off events. [2024-06-27 17:53:05,018 INFO L125 PetriNetUnfolderBase]: For 21563/21563 co-relation queries the response was YES. [2024-06-27 17:53:05,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12832 conditions, 2926 events. 1793/2926 cut-off events. For 21563/21563 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17399 event pairs, 385 based on Foata normal form. 4/2924 useless extension candidates. Maximal degree in co-relation 12786. Up to 2320 conditions per place. [2024-06-27 17:53:05,033 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 101 selfloop transitions, 56 changer transitions 0/170 dead transitions. [2024-06-27 17:53:05,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 170 transitions, 1611 flow [2024-06-27 17:53:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-27 17:53:05,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.698051948051948 [2024-06-27 17:53:05,035 INFO L175 Difference]: Start difference. First operand has 105 places, 114 transitions, 974 flow. Second operand 7 states and 215 transitions. [2024-06-27 17:53:05,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 170 transitions, 1611 flow [2024-06-27 17:53:05,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 170 transitions, 1545 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:05,069 INFO L231 Difference]: Finished difference. Result has 111 places, 127 transitions, 1237 flow [2024-06-27 17:53:05,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1237, PETRI_PLACES=111, PETRI_TRANSITIONS=127} [2024-06-27 17:53:05,070 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 63 predicate places. [2024-06-27 17:53:05,070 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 127 transitions, 1237 flow [2024-06-27 17:53:05,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:05,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:05,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:05,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:53:05,071 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:05,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1586831618, now seen corresponding path program 1 times [2024-06-27 17:53:05,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:05,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271408462] [2024-06-27 17:53:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:05,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:05,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:05,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271408462] [2024-06-27 17:53:05,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271408462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:05,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:05,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:05,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788201368] [2024-06-27 17:53:05,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:05,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:05,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:05,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:05,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:05,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:05,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 127 transitions, 1237 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:05,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:05,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:05,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:05,396 INFO L124 PetriNetUnfolderBase]: 1844/3102 cut-off events. [2024-06-27 17:53:05,397 INFO L125 PetriNetUnfolderBase]: For 26719/26728 co-relation queries the response was YES. [2024-06-27 17:53:05,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14149 conditions, 3102 events. 1844/3102 cut-off events. For 26719/26728 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19158 event pairs, 492 based on Foata normal form. 5/3081 useless extension candidates. Maximal degree in co-relation 14100. Up to 2244 conditions per place. [2024-06-27 17:53:05,416 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 83 selfloop transitions, 70 changer transitions 0/166 dead transitions. [2024-06-27 17:53:05,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 166 transitions, 1875 flow [2024-06-27 17:53:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:05,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:53:05,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:53:05,417 INFO L175 Difference]: Start difference. First operand has 111 places, 127 transitions, 1237 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:53:05,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 166 transitions, 1875 flow [2024-06-27 17:53:05,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 166 transitions, 1780 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:05,463 INFO L231 Difference]: Finished difference. Result has 116 places, 142 transitions, 1517 flow [2024-06-27 17:53:05,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1517, PETRI_PLACES=116, PETRI_TRANSITIONS=142} [2024-06-27 17:53:05,464 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 68 predicate places. [2024-06-27 17:53:05,464 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 142 transitions, 1517 flow [2024-06-27 17:53:05,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:05,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:05,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:05,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:53:05,464 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:05,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash 336808590, now seen corresponding path program 2 times [2024-06-27 17:53:05,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:05,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65929163] [2024-06-27 17:53:05,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:05,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:05,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65929163] [2024-06-27 17:53:05,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65929163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:05,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:05,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:05,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239371893] [2024-06-27 17:53:05,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:05,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:05,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:05,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:05,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:05,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:05,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 142 transitions, 1517 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:05,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:05,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:05,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:05,836 INFO L124 PetriNetUnfolderBase]: 1879/3106 cut-off events. [2024-06-27 17:53:05,836 INFO L125 PetriNetUnfolderBase]: For 28115/28127 co-relation queries the response was YES. [2024-06-27 17:53:05,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15013 conditions, 3106 events. 1879/3106 cut-off events. For 28115/28127 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18886 event pairs, 413 based on Foata normal form. 11/3096 useless extension candidates. Maximal degree in co-relation 14961. Up to 2417 conditions per place. [2024-06-27 17:53:05,859 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 108 selfloop transitions, 56 changer transitions 0/177 dead transitions. [2024-06-27 17:53:05,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 177 transitions, 2070 flow [2024-06-27 17:53:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:53:05,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6525974025974026 [2024-06-27 17:53:05,862 INFO L175 Difference]: Start difference. First operand has 116 places, 142 transitions, 1517 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:53:05,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 177 transitions, 2070 flow [2024-06-27 17:53:05,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 177 transitions, 1991 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-27 17:53:05,910 INFO L231 Difference]: Finished difference. Result has 123 places, 148 transitions, 1661 flow [2024-06-27 17:53:05,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1661, PETRI_PLACES=123, PETRI_TRANSITIONS=148} [2024-06-27 17:53:05,911 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 75 predicate places. [2024-06-27 17:53:05,911 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 148 transitions, 1661 flow [2024-06-27 17:53:05,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:05,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:05,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:05,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:53:05,912 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:05,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash 336803010, now seen corresponding path program 3 times [2024-06-27 17:53:05,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:05,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108885209] [2024-06-27 17:53:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:05,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:05,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:05,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108885209] [2024-06-27 17:53:05,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108885209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:05,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:05,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:05,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448919109] [2024-06-27 17:53:05,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:05,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:05,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:05,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:05,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:05,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:05,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 148 transitions, 1661 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:05,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:05,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:05,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:06,270 INFO L124 PetriNetUnfolderBase]: 1874/3086 cut-off events. [2024-06-27 17:53:06,271 INFO L125 PetriNetUnfolderBase]: For 29153/29165 co-relation queries the response was YES. [2024-06-27 17:53:06,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15114 conditions, 3086 events. 1874/3086 cut-off events. For 29153/29165 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 18711 event pairs, 399 based on Foata normal form. 11/3085 useless extension candidates. Maximal degree in co-relation 15059. Up to 2415 conditions per place. [2024-06-27 17:53:06,291 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 107 selfloop transitions, 57 changer transitions 0/177 dead transitions. [2024-06-27 17:53:06,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 177 transitions, 2137 flow [2024-06-27 17:53:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:53:06,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.678030303030303 [2024-06-27 17:53:06,292 INFO L175 Difference]: Start difference. First operand has 123 places, 148 transitions, 1661 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:53:06,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 177 transitions, 2137 flow [2024-06-27 17:53:06,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 177 transitions, 1983 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:06,349 INFO L231 Difference]: Finished difference. Result has 124 places, 148 transitions, 1631 flow [2024-06-27 17:53:06,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1631, PETRI_PLACES=124, PETRI_TRANSITIONS=148} [2024-06-27 17:53:06,350 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 76 predicate places. [2024-06-27 17:53:06,350 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 148 transitions, 1631 flow [2024-06-27 17:53:06,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:06,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:06,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:06,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:53:06,351 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:06,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1470280198, now seen corresponding path program 1 times [2024-06-27 17:53:06,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:06,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118016798] [2024-06-27 17:53:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:06,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:06,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:06,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118016798] [2024-06-27 17:53:06,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118016798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:06,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:06,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011700024] [2024-06-27 17:53:06,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:06,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:06,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:06,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:06,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:06,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 148 transitions, 1631 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:06,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:06,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:06,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:06,745 INFO L124 PetriNetUnfolderBase]: 1887/3224 cut-off events. [2024-06-27 17:53:06,745 INFO L125 PetriNetUnfolderBase]: For 31720/31732 co-relation queries the response was YES. [2024-06-27 17:53:06,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15306 conditions, 3224 events. 1887/3224 cut-off events. For 31720/31732 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20188 event pairs, 670 based on Foata normal form. 12/3198 useless extension candidates. Maximal degree in co-relation 15250. Up to 2703 conditions per place. [2024-06-27 17:53:06,766 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 134 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-06-27 17:53:06,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 167 transitions, 2011 flow [2024-06-27 17:53:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:06,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-27 17:53:06,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-06-27 17:53:06,768 INFO L175 Difference]: Start difference. First operand has 124 places, 148 transitions, 1631 flow. Second operand 5 states and 138 transitions. [2024-06-27 17:53:06,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 167 transitions, 2011 flow [2024-06-27 17:53:06,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 167 transitions, 1875 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:06,818 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1583 flow [2024-06-27 17:53:06,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1583, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-27 17:53:06,819 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 77 predicate places. [2024-06-27 17:53:06,819 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1583 flow [2024-06-27 17:53:06,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:06,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:06,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:06,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:53:06,819 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:06,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1632146924, now seen corresponding path program 1 times [2024-06-27 17:53:06,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:06,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646279781] [2024-06-27 17:53:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:06,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:06,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:06,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646279781] [2024-06-27 17:53:06,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646279781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:06,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:06,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:06,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382896966] [2024-06-27 17:53:06,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:06,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:06,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:06,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:06,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:06,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:06,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1583 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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 17:53:06,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:06,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:06,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:07,233 INFO L124 PetriNetUnfolderBase]: 1895/3151 cut-off events. [2024-06-27 17:53:07,234 INFO L125 PetriNetUnfolderBase]: For 32633/32645 co-relation queries the response was YES. [2024-06-27 17:53:07,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15067 conditions, 3151 events. 1895/3151 cut-off events. For 32633/32645 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19549 event pairs, 480 based on Foata normal form. 10/3131 useless extension candidates. Maximal degree in co-relation 15011. Up to 2302 conditions per place. [2024-06-27 17:53:07,256 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 95 selfloop transitions, 72 changer transitions 0/180 dead transitions. [2024-06-27 17:53:07,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 180 transitions, 2103 flow [2024-06-27 17:53:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:53:07,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2024-06-27 17:53:07,257 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1583 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:53:07,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 180 transitions, 2103 flow [2024-06-27 17:53:07,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 180 transitions, 2037 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:07,324 INFO L231 Difference]: Finished difference. Result has 128 places, 154 transitions, 1706 flow [2024-06-27 17:53:07,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1706, PETRI_PLACES=128, PETRI_TRANSITIONS=154} [2024-06-27 17:53:07,325 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 80 predicate places. [2024-06-27 17:53:07,325 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 154 transitions, 1706 flow [2024-06-27 17:53:07,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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 17:53:07,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:07,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:07,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:53:07,326 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:07,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:07,326 INFO L85 PathProgramCache]: Analyzing trace with hash 915600030, now seen corresponding path program 1 times [2024-06-27 17:53:07,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:07,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460781055] [2024-06-27 17:53:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:07,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:07,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:07,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460781055] [2024-06-27 17:53:07,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460781055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:07,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:07,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:07,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635382528] [2024-06-27 17:53:07,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:07,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:07,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:07,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:07,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:07,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:07,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 154 transitions, 1706 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:07,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:07,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:07,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:07,734 INFO L124 PetriNetUnfolderBase]: 1929/3207 cut-off events. [2024-06-27 17:53:07,734 INFO L125 PetriNetUnfolderBase]: For 36063/36063 co-relation queries the response was YES. [2024-06-27 17:53:07,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15832 conditions, 3207 events. 1929/3207 cut-off events. For 36063/36063 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19801 event pairs, 440 based on Foata normal form. 2/3180 useless extension candidates. Maximal degree in co-relation 15775. Up to 2316 conditions per place. [2024-06-27 17:53:07,757 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 90 selfloop transitions, 88 changer transitions 0/191 dead transitions. [2024-06-27 17:53:07,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 191 transitions, 2376 flow [2024-06-27 17:53:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:53:07,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6856060606060606 [2024-06-27 17:53:07,759 INFO L175 Difference]: Start difference. First operand has 128 places, 154 transitions, 1706 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:53:07,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 191 transitions, 2376 flow [2024-06-27 17:53:07,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 191 transitions, 2141 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:07,828 INFO L231 Difference]: Finished difference. Result has 129 places, 161 transitions, 1787 flow [2024-06-27 17:53:07,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1787, PETRI_PLACES=129, PETRI_TRANSITIONS=161} [2024-06-27 17:53:07,828 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 81 predicate places. [2024-06-27 17:53:07,829 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 161 transitions, 1787 flow [2024-06-27 17:53:07,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:07,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:07,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:07,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:53:07,829 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:07,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:07,830 INFO L85 PathProgramCache]: Analyzing trace with hash -419980028, now seen corresponding path program 2 times [2024-06-27 17:53:07,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:07,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938863691] [2024-06-27 17:53:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:07,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:07,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:07,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938863691] [2024-06-27 17:53:07,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938863691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:07,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:07,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:07,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095388985] [2024-06-27 17:53:07,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:07,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:07,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:07,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:07,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:07,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:07,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 161 transitions, 1787 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:07,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:07,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:07,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:08,237 INFO L124 PetriNetUnfolderBase]: 1921/3319 cut-off events. [2024-06-27 17:53:08,237 INFO L125 PetriNetUnfolderBase]: For 36649/36649 co-relation queries the response was YES. [2024-06-27 17:53:08,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15884 conditions, 3319 events. 1921/3319 cut-off events. For 36649/36649 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21100 event pairs, 656 based on Foata normal form. 2/3278 useless extension candidates. Maximal degree in co-relation 15828. Up to 2749 conditions per place. [2024-06-27 17:53:08,258 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 148 selfloop transitions, 27 changer transitions 0/188 dead transitions. [2024-06-27 17:53:08,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 188 transitions, 2199 flow [2024-06-27 17:53:08,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-27 17:53:08,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2024-06-27 17:53:08,260 INFO L175 Difference]: Start difference. First operand has 129 places, 161 transitions, 1787 flow. Second operand 7 states and 192 transitions. [2024-06-27 17:53:08,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 188 transitions, 2199 flow [2024-06-27 17:53:08,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 188 transitions, 2061 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:08,302 INFO L231 Difference]: Finished difference. Result has 133 places, 161 transitions, 1711 flow [2024-06-27 17:53:08,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1649, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1711, PETRI_PLACES=133, PETRI_TRANSITIONS=161} [2024-06-27 17:53:08,303 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 85 predicate places. [2024-06-27 17:53:08,303 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 161 transitions, 1711 flow [2024-06-27 17:53:08,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:08,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:08,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:08,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:53:08,304 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:08,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:08,304 INFO L85 PathProgramCache]: Analyzing trace with hash -450057670, now seen corresponding path program 2 times [2024-06-27 17:53:08,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:08,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882901311] [2024-06-27 17:53:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:08,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:08,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:08,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882901311] [2024-06-27 17:53:08,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882901311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:08,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:08,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:08,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110825027] [2024-06-27 17:53:08,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:08,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:08,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:08,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:08,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:08,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:08,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 161 transitions, 1711 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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 17:53:08,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:08,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:08,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:08,673 INFO L124 PetriNetUnfolderBase]: 1945/3222 cut-off events. [2024-06-27 17:53:08,673 INFO L125 PetriNetUnfolderBase]: For 38631/38640 co-relation queries the response was YES. [2024-06-27 17:53:08,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15582 conditions, 3222 events. 1945/3222 cut-off events. For 38631/38640 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19815 event pairs, 407 based on Foata normal form. 8/3208 useless extension candidates. Maximal degree in co-relation 15526. Up to 2486 conditions per place. [2024-06-27 17:53:08,694 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 118 selfloop transitions, 63 changer transitions 0/194 dead transitions. [2024-06-27 17:53:08,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 194 transitions, 2289 flow [2024-06-27 17:53:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:53:08,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6493506493506493 [2024-06-27 17:53:08,695 INFO L175 Difference]: Start difference. First operand has 133 places, 161 transitions, 1711 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:53:08,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 194 transitions, 2289 flow [2024-06-27 17:53:08,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 194 transitions, 2235 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:08,752 INFO L231 Difference]: Finished difference. Result has 134 places, 165 transitions, 1844 flow [2024-06-27 17:53:08,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1844, PETRI_PLACES=134, PETRI_TRANSITIONS=165} [2024-06-27 17:53:08,757 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 86 predicate places. [2024-06-27 17:53:08,757 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 165 transitions, 1844 flow [2024-06-27 17:53:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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 17:53:08,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:08,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:08,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:53:08,758 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:08,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:08,758 INFO L85 PathProgramCache]: Analyzing trace with hash -793539884, now seen corresponding path program 3 times [2024-06-27 17:53:08,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:08,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642042334] [2024-06-27 17:53:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:08,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:08,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:08,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642042334] [2024-06-27 17:53:08,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642042334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:08,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:08,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:08,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751231848] [2024-06-27 17:53:08,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:08,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:08,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:08,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:08,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:08,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:08,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 165 transitions, 1844 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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 17:53:08,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:08,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:08,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:09,201 INFO L124 PetriNetUnfolderBase]: 1939/3221 cut-off events. [2024-06-27 17:53:09,202 INFO L125 PetriNetUnfolderBase]: For 41437/41446 co-relation queries the response was YES. [2024-06-27 17:53:09,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15915 conditions, 3221 events. 1939/3221 cut-off events. For 41437/41446 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19812 event pairs, 405 based on Foata normal form. 8/3208 useless extension candidates. Maximal degree in co-relation 15858. Up to 2481 conditions per place. [2024-06-27 17:53:09,222 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 118 selfloop transitions, 62 changer transitions 0/193 dead transitions. [2024-06-27 17:53:09,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 193 transitions, 2322 flow [2024-06-27 17:53:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:53:09,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6704545454545454 [2024-06-27 17:53:09,223 INFO L175 Difference]: Start difference. First operand has 134 places, 165 transitions, 1844 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:53:09,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 193 transitions, 2322 flow [2024-06-27 17:53:09,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 193 transitions, 2208 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:09,278 INFO L231 Difference]: Finished difference. Result has 136 places, 165 transitions, 1862 flow [2024-06-27 17:53:09,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1862, PETRI_PLACES=136, PETRI_TRANSITIONS=165} [2024-06-27 17:53:09,279 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 88 predicate places. [2024-06-27 17:53:09,279 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 165 transitions, 1862 flow [2024-06-27 17:53:09,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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 17:53:09,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:09,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:09,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:53:09,280 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:09,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:09,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1756453590, now seen corresponding path program 3 times [2024-06-27 17:53:09,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:09,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411221206] [2024-06-27 17:53:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:09,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:09,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:09,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411221206] [2024-06-27 17:53:09,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411221206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:09,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:09,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:09,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014827761] [2024-06-27 17:53:09,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:09,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:09,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:09,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:09,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 165 transitions, 1862 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:09,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:09,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:09,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:09,645 INFO L124 PetriNetUnfolderBase]: 1950/3229 cut-off events. [2024-06-27 17:53:09,645 INFO L125 PetriNetUnfolderBase]: For 43406/43412 co-relation queries the response was YES. [2024-06-27 17:53:09,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16140 conditions, 3229 events. 1950/3229 cut-off events. For 43406/43412 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 19850 event pairs, 458 based on Foata normal form. 2/3206 useless extension candidates. Maximal degree in co-relation 16082. Up to 2333 conditions per place. [2024-06-27 17:53:09,667 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 89 selfloop transitions, 93 changer transitions 0/195 dead transitions. [2024-06-27 17:53:09,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 195 transitions, 2485 flow [2024-06-27 17:53:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:09,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:53:09,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:53:09,668 INFO L175 Difference]: Start difference. First operand has 136 places, 165 transitions, 1862 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:53:09,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 195 transitions, 2485 flow [2024-06-27 17:53:09,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 195 transitions, 2294 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:09,727 INFO L231 Difference]: Finished difference. Result has 135 places, 168 transitions, 1898 flow [2024-06-27 17:53:09,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1898, PETRI_PLACES=135, PETRI_TRANSITIONS=168} [2024-06-27 17:53:09,727 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 87 predicate places. [2024-06-27 17:53:09,728 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 168 transitions, 1898 flow [2024-06-27 17:53:09,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:09,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:09,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:09,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:53:09,728 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:09,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:09,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1492132514, now seen corresponding path program 4 times [2024-06-27 17:53:09,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:09,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574232680] [2024-06-27 17:53:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:09,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:09,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:09,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574232680] [2024-06-27 17:53:09,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574232680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:09,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:09,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:09,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129255250] [2024-06-27 17:53:09,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:09,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:09,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:09,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:09,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:09,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:09,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 168 transitions, 1898 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:09,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:09,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:09,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:10,090 INFO L124 PetriNetUnfolderBase]: 1942/3216 cut-off events. [2024-06-27 17:53:10,090 INFO L125 PetriNetUnfolderBase]: For 44436/44442 co-relation queries the response was YES. [2024-06-27 17:53:10,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16114 conditions, 3216 events. 1942/3216 cut-off events. For 44436/44442 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19783 event pairs, 459 based on Foata normal form. 3/3194 useless extension candidates. Maximal degree in co-relation 16055. Up to 2328 conditions per place. [2024-06-27 17:53:10,114 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 89 selfloop transitions, 89 changer transitions 0/191 dead transitions. [2024-06-27 17:53:10,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 191 transitions, 2418 flow [2024-06-27 17:53:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:53:10,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2024-06-27 17:53:10,115 INFO L175 Difference]: Start difference. First operand has 135 places, 168 transitions, 1898 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:53:10,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 191 transitions, 2418 flow [2024-06-27 17:53:10,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 191 transitions, 2156 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:10,184 INFO L231 Difference]: Finished difference. Result has 136 places, 168 transitions, 1822 flow [2024-06-27 17:53:10,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1822, PETRI_PLACES=136, PETRI_TRANSITIONS=168} [2024-06-27 17:53:10,185 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 88 predicate places. [2024-06-27 17:53:10,185 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 168 transitions, 1822 flow [2024-06-27 17:53:10,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:10,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:10,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:10,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:53:10,185 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:10,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1659267068, now seen corresponding path program 5 times [2024-06-27 17:53:10,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:10,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531996592] [2024-06-27 17:53:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:10,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:10,254 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 17:53:10,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:10,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531996592] [2024-06-27 17:53:10,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531996592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:10,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:10,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:10,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263963498] [2024-06-27 17:53:10,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:10,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:10,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:10,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:10,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:10,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:10,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 168 transitions, 1822 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:10,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:10,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:10,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:10,574 INFO L124 PetriNetUnfolderBase]: 1936/3185 cut-off events. [2024-06-27 17:53:10,575 INFO L125 PetriNetUnfolderBase]: For 43522/43531 co-relation queries the response was YES. [2024-06-27 17:53:10,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15817 conditions, 3185 events. 1936/3185 cut-off events. For 43522/43531 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19426 event pairs, 394 based on Foata normal form. 8/3180 useless extension candidates. Maximal degree in co-relation 15758. Up to 2482 conditions per place. [2024-06-27 17:53:10,594 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 121 selfloop transitions, 65 changer transitions 0/199 dead transitions. [2024-06-27 17:53:10,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2326 flow [2024-06-27 17:53:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:53:10,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6856060606060606 [2024-06-27 17:53:10,596 INFO L175 Difference]: Start difference. First operand has 136 places, 168 transitions, 1822 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:53:10,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2326 flow [2024-06-27 17:53:10,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 2125 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:10,670 INFO L231 Difference]: Finished difference. Result has 137 places, 168 transitions, 1764 flow [2024-06-27 17:53:10,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1764, PETRI_PLACES=137, PETRI_TRANSITIONS=168} [2024-06-27 17:53:10,671 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 89 predicate places. [2024-06-27 17:53:10,671 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 168 transitions, 1764 flow [2024-06-27 17:53:10,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:10,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:10,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:10,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:53:10,672 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:10,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1653553148, now seen corresponding path program 6 times [2024-06-27 17:53:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:10,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427170329] [2024-06-27 17:53:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:10,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:10,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427170329] [2024-06-27 17:53:10,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427170329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:10,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:10,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:10,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116631863] [2024-06-27 17:53:10,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:10,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:10,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:10,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:10,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:10,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:10,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 168 transitions, 1764 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:10,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:10,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:10,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:11,064 INFO L124 PetriNetUnfolderBase]: 1912/3177 cut-off events. [2024-06-27 17:53:11,064 INFO L125 PetriNetUnfolderBase]: For 44780/44780 co-relation queries the response was YES. [2024-06-27 17:53:11,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15392 conditions, 3177 events. 1912/3177 cut-off events. For 44780/44780 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19574 event pairs, 382 based on Foata normal form. 4/3169 useless extension candidates. Maximal degree in co-relation 15332. Up to 2458 conditions per place. [2024-06-27 17:53:11,086 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 126 selfloop transitions, 68 changer transitions 0/207 dead transitions. [2024-06-27 17:53:11,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 207 transitions, 2246 flow [2024-06-27 17:53:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 17:53:11,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6948051948051948 [2024-06-27 17:53:11,088 INFO L175 Difference]: Start difference. First operand has 137 places, 168 transitions, 1764 flow. Second operand 7 states and 214 transitions. [2024-06-27 17:53:11,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 207 transitions, 2246 flow [2024-06-27 17:53:11,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 207 transitions, 2132 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:11,153 INFO L231 Difference]: Finished difference. Result has 139 places, 168 transitions, 1807 flow [2024-06-27 17:53:11,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1807, PETRI_PLACES=139, PETRI_TRANSITIONS=168} [2024-06-27 17:53:11,154 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 91 predicate places. [2024-06-27 17:53:11,154 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 168 transitions, 1807 flow [2024-06-27 17:53:11,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:11,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:11,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:11,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:53:11,155 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:11,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1950000870, now seen corresponding path program 1 times [2024-06-27 17:53:11,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:11,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978676608] [2024-06-27 17:53:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:11,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:11,232 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 17:53:11,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:11,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978676608] [2024-06-27 17:53:11,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978676608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:11,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:11,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:11,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255246488] [2024-06-27 17:53:11,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:11,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:11,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:11,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:11,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:11,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:11,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 168 transitions, 1807 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:11,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:11,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:11,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:11,558 INFO L124 PetriNetUnfolderBase]: 1930/3210 cut-off events. [2024-06-27 17:53:11,558 INFO L125 PetriNetUnfolderBase]: For 43969/43969 co-relation queries the response was YES. [2024-06-27 17:53:11,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15661 conditions, 3210 events. 1930/3210 cut-off events. For 43969/43969 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19769 event pairs, 605 based on Foata normal form. 2/3198 useless extension candidates. Maximal degree in co-relation 15601. Up to 2756 conditions per place. [2024-06-27 17:53:11,620 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 166 selfloop transitions, 20 changer transitions 0/199 dead transitions. [2024-06-27 17:53:11,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 199 transitions, 2345 flow [2024-06-27 17:53:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-27 17:53:11,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6287878787878788 [2024-06-27 17:53:11,621 INFO L175 Difference]: Start difference. First operand has 139 places, 168 transitions, 1807 flow. Second operand 6 states and 166 transitions. [2024-06-27 17:53:11,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 199 transitions, 2345 flow [2024-06-27 17:53:11,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 199 transitions, 2140 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:11,696 INFO L231 Difference]: Finished difference. Result has 136 places, 172 transitions, 1699 flow [2024-06-27 17:53:11,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1699, PETRI_PLACES=136, PETRI_TRANSITIONS=172} [2024-06-27 17:53:11,696 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 88 predicate places. [2024-06-27 17:53:11,697 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 172 transitions, 1699 flow [2024-06-27 17:53:11,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:11,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:11,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:11,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:53:11,697 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:11,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:11,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1947143910, now seen corresponding path program 2 times [2024-06-27 17:53:11,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:11,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726423737] [2024-06-27 17:53:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:11,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:11,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:11,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726423737] [2024-06-27 17:53:11,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726423737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:11,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:11,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:11,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217385787] [2024-06-27 17:53:11,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:11,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:11,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:11,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 172 transitions, 1699 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:11,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:11,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:11,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:12,056 INFO L124 PetriNetUnfolderBase]: 1948/3216 cut-off events. [2024-06-27 17:53:12,056 INFO L125 PetriNetUnfolderBase]: For 40725/40725 co-relation queries the response was YES. [2024-06-27 17:53:12,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15324 conditions, 3216 events. 1948/3216 cut-off events. For 40725/40725 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 19793 event pairs, 658 based on Foata normal form. 2/3203 useless extension candidates. Maximal degree in co-relation 15265. Up to 2833 conditions per place. [2024-06-27 17:53:12,079 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 166 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2024-06-27 17:53:12,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 196 transitions, 2141 flow [2024-06-27 17:53:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 17:53:12,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098484848484849 [2024-06-27 17:53:12,080 INFO L175 Difference]: Start difference. First operand has 136 places, 172 transitions, 1699 flow. Second operand 6 states and 161 transitions. [2024-06-27 17:53:12,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 196 transitions, 2141 flow [2024-06-27 17:53:12,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 196 transitions, 2091 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 17:53:12,150 INFO L231 Difference]: Finished difference. Result has 140 places, 174 transitions, 1718 flow [2024-06-27 17:53:12,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1718, PETRI_PLACES=140, PETRI_TRANSITIONS=174} [2024-06-27 17:53:12,150 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 92 predicate places. [2024-06-27 17:53:12,150 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 174 transitions, 1718 flow [2024-06-27 17:53:12,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:12,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:12,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:12,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:53:12,151 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:12,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:12,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1970757172, now seen corresponding path program 3 times [2024-06-27 17:53:12,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:12,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542455285] [2024-06-27 17:53:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:12,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:12,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:12,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542455285] [2024-06-27 17:53:12,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542455285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:12,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:12,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:12,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914196564] [2024-06-27 17:53:12,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:12,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:12,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:12,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:12,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 174 transitions, 1718 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:12,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:12,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:12,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:12,573 INFO L124 PetriNetUnfolderBase]: 1943/3176 cut-off events. [2024-06-27 17:53:12,573 INFO L125 PetriNetUnfolderBase]: For 41529/41529 co-relation queries the response was YES. [2024-06-27 17:53:12,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15240 conditions, 3176 events. 1943/3176 cut-off events. For 41529/41529 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19270 event pairs, 319 based on Foata normal form. 2/3173 useless extension candidates. Maximal degree in co-relation 15179. Up to 2807 conditions per place. [2024-06-27 17:53:12,597 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 167 selfloop transitions, 16 changer transitions 0/196 dead transitions. [2024-06-27 17:53:12,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 196 transitions, 2136 flow [2024-06-27 17:53:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-06-27 17:53:12,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2024-06-27 17:53:12,598 INFO L175 Difference]: Start difference. First operand has 140 places, 174 transitions, 1718 flow. Second operand 5 states and 142 transitions. [2024-06-27 17:53:12,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 196 transitions, 2136 flow [2024-06-27 17:53:12,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 196 transitions, 2087 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:12,679 INFO L231 Difference]: Finished difference. Result has 141 places, 174 transitions, 1709 flow [2024-06-27 17:53:12,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1709, PETRI_PLACES=141, PETRI_TRANSITIONS=174} [2024-06-27 17:53:12,680 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 93 predicate places. [2024-06-27 17:53:12,680 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 174 transitions, 1709 flow [2024-06-27 17:53:12,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:12,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:12,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:12,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:53:12,681 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:12,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash 902955528, now seen corresponding path program 1 times [2024-06-27 17:53:12,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:12,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051164959] [2024-06-27 17:53:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:12,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:12,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:12,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051164959] [2024-06-27 17:53:12,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051164959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:12,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:12,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:12,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569615361] [2024-06-27 17:53:12,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:12,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:12,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:12,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:12,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:12,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 174 transitions, 1709 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:12,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:12,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:12,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:13,172 INFO L124 PetriNetUnfolderBase]: 1940/3209 cut-off events. [2024-06-27 17:53:13,172 INFO L125 PetriNetUnfolderBase]: For 43181/43181 co-relation queries the response was YES. [2024-06-27 17:53:13,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15276 conditions, 3209 events. 1940/3209 cut-off events. For 43181/43181 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19708 event pairs, 434 based on Foata normal form. 1/3181 useless extension candidates. Maximal degree in co-relation 15214. Up to 2344 conditions per place. [2024-06-27 17:53:13,197 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 99 selfloop transitions, 97 changer transitions 0/209 dead transitions. [2024-06-27 17:53:13,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 209 transitions, 2307 flow [2024-06-27 17:53:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:13,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 17:53:13,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6688311688311688 [2024-06-27 17:53:13,213 INFO L175 Difference]: Start difference. First operand has 141 places, 174 transitions, 1709 flow. Second operand 7 states and 206 transitions. [2024-06-27 17:53:13,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 209 transitions, 2307 flow [2024-06-27 17:53:13,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 209 transitions, 2264 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:13,324 INFO L231 Difference]: Finished difference. Result has 144 places, 174 transitions, 1866 flow [2024-06-27 17:53:13,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1866, PETRI_PLACES=144, PETRI_TRANSITIONS=174} [2024-06-27 17:53:13,325 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 96 predicate places. [2024-06-27 17:53:13,325 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 174 transitions, 1866 flow [2024-06-27 17:53:13,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:13,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:13,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:13,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:53:13,325 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:13,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:13,326 INFO L85 PathProgramCache]: Analyzing trace with hash -400507876, now seen corresponding path program 1 times [2024-06-27 17:53:13,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:13,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042221565] [2024-06-27 17:53:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:13,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:13,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:13,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042221565] [2024-06-27 17:53:13,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042221565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:13,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:13,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:13,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421740142] [2024-06-27 17:53:13,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:13,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:13,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:13,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:13,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:13,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 174 transitions, 1866 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:13,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:13,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:13,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:13,881 INFO L124 PetriNetUnfolderBase]: 2415/3934 cut-off events. [2024-06-27 17:53:13,881 INFO L125 PetriNetUnfolderBase]: For 75627/75627 co-relation queries the response was YES. [2024-06-27 17:53:13,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19823 conditions, 3934 events. 2415/3934 cut-off events. For 75627/75627 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24791 event pairs, 477 based on Foata normal form. 10/3917 useless extension candidates. Maximal degree in co-relation 19760. Up to 2168 conditions per place. [2024-06-27 17:53:13,908 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 112 selfloop transitions, 102 changer transitions 0/227 dead transitions. [2024-06-27 17:53:13,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 227 transitions, 2678 flow [2024-06-27 17:53:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-27 17:53:13,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7077922077922078 [2024-06-27 17:53:13,909 INFO L175 Difference]: Start difference. First operand has 144 places, 174 transitions, 1866 flow. Second operand 7 states and 218 transitions. [2024-06-27 17:53:13,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 227 transitions, 2678 flow [2024-06-27 17:53:14,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 227 transitions, 2425 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:14,029 INFO L231 Difference]: Finished difference. Result has 144 places, 178 transitions, 1882 flow [2024-06-27 17:53:14,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1882, PETRI_PLACES=144, PETRI_TRANSITIONS=178} [2024-06-27 17:53:14,029 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 96 predicate places. [2024-06-27 17:53:14,029 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 178 transitions, 1882 flow [2024-06-27 17:53:14,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:14,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:14,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:14,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:53:14,030 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:14,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:14,030 INFO L85 PathProgramCache]: Analyzing trace with hash -392889316, now seen corresponding path program 2 times [2024-06-27 17:53:14,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:14,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440264487] [2024-06-27 17:53:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:14,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:14,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:14,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440264487] [2024-06-27 17:53:14,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440264487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:14,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:14,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:14,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473539202] [2024-06-27 17:53:14,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:14,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:14,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:14,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:14,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:14,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:14,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 178 transitions, 1882 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:14,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:14,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:14,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:14,536 INFO L124 PetriNetUnfolderBase]: 2497/4056 cut-off events. [2024-06-27 17:53:14,536 INFO L125 PetriNetUnfolderBase]: For 81081/81081 co-relation queries the response was YES. [2024-06-27 17:53:14,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20655 conditions, 4056 events. 2497/4056 cut-off events. For 81081/81081 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 25652 event pairs, 588 based on Foata normal form. 10/4039 useless extension candidates. Maximal degree in co-relation 20592. Up to 3105 conditions per place. [2024-06-27 17:53:14,563 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 107 selfloop transitions, 99 changer transitions 0/219 dead transitions. [2024-06-27 17:53:14,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 219 transitions, 2558 flow [2024-06-27 17:53:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:53:14,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-27 17:53:14,565 INFO L175 Difference]: Start difference. First operand has 144 places, 178 transitions, 1882 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:53:14,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 219 transitions, 2558 flow [2024-06-27 17:53:14,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 219 transitions, 2344 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:14,674 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 1908 flow [2024-06-27 17:53:14,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1908, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2024-06-27 17:53:14,675 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 99 predicate places. [2024-06-27 17:53:14,675 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 1908 flow [2024-06-27 17:53:14,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:14,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:14,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:14,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:53:14,675 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:14,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash -282088000, now seen corresponding path program 2 times [2024-06-27 17:53:14,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:14,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986666257] [2024-06-27 17:53:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:14,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:14,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:14,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986666257] [2024-06-27 17:53:14,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986666257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:14,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:14,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:14,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017898701] [2024-06-27 17:53:14,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:14,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:14,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:14,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:14,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:14,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 1908 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:14,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:14,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:14,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:15,143 INFO L124 PetriNetUnfolderBase]: 2508/4109 cut-off events. [2024-06-27 17:53:15,143 INFO L125 PetriNetUnfolderBase]: For 79769/79769 co-relation queries the response was YES. [2024-06-27 17:53:15,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20893 conditions, 4109 events. 2508/4109 cut-off events. For 79769/79769 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 26243 event pairs, 615 based on Foata normal form. 1/4080 useless extension candidates. Maximal degree in co-relation 20829. Up to 3199 conditions per place. [2024-06-27 17:53:15,174 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 106 selfloop transitions, 96 changer transitions 0/215 dead transitions. [2024-06-27 17:53:15,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 215 transitions, 2561 flow [2024-06-27 17:53:15,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 17:53:15,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2024-06-27 17:53:15,176 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 1908 flow. Second operand 7 states and 203 transitions. [2024-06-27 17:53:15,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 215 transitions, 2561 flow [2024-06-27 17:53:15,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 215 transitions, 2345 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:15,280 INFO L231 Difference]: Finished difference. Result has 149 places, 183 transitions, 1929 flow [2024-06-27 17:53:15,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1929, PETRI_PLACES=149, PETRI_TRANSITIONS=183} [2024-06-27 17:53:15,280 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 101 predicate places. [2024-06-27 17:53:15,280 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 183 transitions, 1929 flow [2024-06-27 17:53:15,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:15,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:15,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:15,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:53:15,281 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:15,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:15,281 INFO L85 PathProgramCache]: Analyzing trace with hash -134601346, now seen corresponding path program 3 times [2024-06-27 17:53:15,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:15,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134443621] [2024-06-27 17:53:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:15,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:15,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:15,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134443621] [2024-06-27 17:53:15,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134443621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:15,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:15,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:15,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936024577] [2024-06-27 17:53:15,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:15,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:15,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:15,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:15,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:15,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:15,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 183 transitions, 1929 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:15,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:15,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:15,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:15,866 INFO L124 PetriNetUnfolderBase]: 2590/4231 cut-off events. [2024-06-27 17:53:15,867 INFO L125 PetriNetUnfolderBase]: For 88783/88783 co-relation queries the response was YES. [2024-06-27 17:53:15,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21410 conditions, 4231 events. 2590/4231 cut-off events. For 88783/88783 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27112 event pairs, 705 based on Foata normal form. 10/4230 useless extension candidates. Maximal degree in co-relation 21345. Up to 3675 conditions per place. [2024-06-27 17:53:15,894 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 177 selfloop transitions, 29 changer transitions 0/219 dead transitions. [2024-06-27 17:53:15,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 219 transitions, 2459 flow [2024-06-27 17:53:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 17:53:15,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-27 17:53:15,895 INFO L175 Difference]: Start difference. First operand has 149 places, 183 transitions, 1929 flow. Second operand 8 states and 218 transitions. [2024-06-27 17:53:15,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 219 transitions, 2459 flow [2024-06-27 17:53:16,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 219 transitions, 2304 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:16,006 INFO L231 Difference]: Finished difference. Result has 153 places, 185 transitions, 1874 flow [2024-06-27 17:53:16,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1874, PETRI_PLACES=153, PETRI_TRANSITIONS=185} [2024-06-27 17:53:16,007 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 105 predicate places. [2024-06-27 17:53:16,007 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 185 transitions, 1874 flow [2024-06-27 17:53:16,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:16,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:16,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:16,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:53:16,008 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:16,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:16,008 INFO L85 PathProgramCache]: Analyzing trace with hash -556905622, now seen corresponding path program 3 times [2024-06-27 17:53:16,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:16,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458671502] [2024-06-27 17:53:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:16,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:16,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:16,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458671502] [2024-06-27 17:53:16,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458671502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:16,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:16,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:16,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169349293] [2024-06-27 17:53:16,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:16,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:16,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:16,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:16,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:16,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 185 transitions, 1874 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:16,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:16,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:16,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:16,510 INFO L124 PetriNetUnfolderBase]: 2601/4219 cut-off events. [2024-06-27 17:53:16,511 INFO L125 PetriNetUnfolderBase]: For 88201/88207 co-relation queries the response was YES. [2024-06-27 17:53:16,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21337 conditions, 4219 events. 2601/4219 cut-off events. For 88201/88207 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26947 event pairs, 626 based on Foata normal form. 2/4189 useless extension candidates. Maximal degree in co-relation 21271. Up to 3329 conditions per place. [2024-06-27 17:53:16,542 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 106 selfloop transitions, 98 changer transitions 0/217 dead transitions. [2024-06-27 17:53:16,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 217 transitions, 2528 flow [2024-06-27 17:53:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:53:16,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:53:16,544 INFO L175 Difference]: Start difference. First operand has 153 places, 185 transitions, 1874 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:53:16,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 217 transitions, 2528 flow [2024-06-27 17:53:16,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 217 transitions, 2454 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:16,712 INFO L231 Difference]: Finished difference. Result has 154 places, 188 transitions, 2040 flow [2024-06-27 17:53:16,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2040, PETRI_PLACES=154, PETRI_TRANSITIONS=188} [2024-06-27 17:53:16,713 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 106 predicate places. [2024-06-27 17:53:16,713 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 188 transitions, 2040 flow [2024-06-27 17:53:16,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:16,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:16,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:16,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:53:16,713 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:16,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:16,714 INFO L85 PathProgramCache]: Analyzing trace with hash 354036140, now seen corresponding path program 4 times [2024-06-27 17:53:16,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:16,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913920095] [2024-06-27 17:53:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:16,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:16,768 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 17:53:16,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:16,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913920095] [2024-06-27 17:53:16,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913920095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:16,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:16,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:16,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413690643] [2024-06-27 17:53:16,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:16,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:16,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:16,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:16,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:16,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:16,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 188 transitions, 2040 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:16,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:16,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:16,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:17,210 INFO L124 PetriNetUnfolderBase]: 2595/4199 cut-off events. [2024-06-27 17:53:17,210 INFO L125 PetriNetUnfolderBase]: For 92038/92044 co-relation queries the response was YES. [2024-06-27 17:53:17,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21587 conditions, 4199 events. 2595/4199 cut-off events. For 92038/92044 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26752 event pairs, 637 based on Foata normal form. 3/4175 useless extension candidates. Maximal degree in co-relation 21520. Up to 3324 conditions per place. [2024-06-27 17:53:17,242 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 110 selfloop transitions, 94 changer transitions 0/217 dead transitions. [2024-06-27 17:53:17,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 217 transitions, 2660 flow [2024-06-27 17:53:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:17,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-27 17:53:17,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306818181818182 [2024-06-27 17:53:17,244 INFO L175 Difference]: Start difference. First operand has 154 places, 188 transitions, 2040 flow. Second operand 8 states and 222 transitions. [2024-06-27 17:53:17,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 217 transitions, 2660 flow [2024-06-27 17:53:17,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 217 transitions, 2503 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:17,375 INFO L231 Difference]: Finished difference. Result has 158 places, 188 transitions, 2078 flow [2024-06-27 17:53:17,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2078, PETRI_PLACES=158, PETRI_TRANSITIONS=188} [2024-06-27 17:53:17,376 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 110 predicate places. [2024-06-27 17:53:17,475 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 188 transitions, 2078 flow [2024-06-27 17:53:17,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:17,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:17,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:17,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:53:17,476 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:17,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash -800507394, now seen corresponding path program 4 times [2024-06-27 17:53:17,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:17,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129841429] [2024-06-27 17:53:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:17,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:17,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:17,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129841429] [2024-06-27 17:53:17,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129841429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:17,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:17,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:17,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586685856] [2024-06-27 17:53:17,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:17,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:17,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:17,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:17,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:17,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:17,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 188 transitions, 2078 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:17,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:17,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:17,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:18,071 INFO L124 PetriNetUnfolderBase]: 2814/4534 cut-off events. [2024-06-27 17:53:18,072 INFO L125 PetriNetUnfolderBase]: For 120812/120812 co-relation queries the response was YES. [2024-06-27 17:53:18,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22412 conditions, 4534 events. 2814/4534 cut-off events. For 120812/120812 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29314 event pairs, 501 based on Foata normal form. 44/4570 useless extension candidates. Maximal degree in co-relation 22343. Up to 3127 conditions per place. [2024-06-27 17:53:18,106 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 151 selfloop transitions, 76 changer transitions 0/240 dead transitions. [2024-06-27 17:53:18,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 240 transitions, 2682 flow [2024-06-27 17:53:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:18,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-06-27 17:53:18,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6960227272727273 [2024-06-27 17:53:18,108 INFO L175 Difference]: Start difference. First operand has 158 places, 188 transitions, 2078 flow. Second operand 8 states and 245 transitions. [2024-06-27 17:53:18,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 240 transitions, 2682 flow [2024-06-27 17:53:18,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 240 transitions, 2358 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:18,257 INFO L231 Difference]: Finished difference. Result has 158 places, 189 transitions, 1939 flow [2024-06-27 17:53:18,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1939, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2024-06-27 17:53:18,258 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 110 predicate places. [2024-06-27 17:53:18,258 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 1939 flow [2024-06-27 17:53:18,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:18,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:18,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:18,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:53:18,258 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:18,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:18,259 INFO L85 PathProgramCache]: Analyzing trace with hash 91654233, now seen corresponding path program 1 times [2024-06-27 17:53:18,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:18,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96768232] [2024-06-27 17:53:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:18,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:18,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:18,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96768232] [2024-06-27 17:53:18,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96768232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:18,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:18,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:18,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122584954] [2024-06-27 17:53:18,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:18,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:18,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:18,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:18,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 1939 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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 17:53:18,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:18,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:18,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:18,754 INFO L124 PetriNetUnfolderBase]: 2832/4602 cut-off events. [2024-06-27 17:53:18,755 INFO L125 PetriNetUnfolderBase]: For 93103/93103 co-relation queries the response was YES. [2024-06-27 17:53:18,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22733 conditions, 4602 events. 2832/4602 cut-off events. For 93103/93103 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 30096 event pairs, 789 based on Foata normal form. 2/4583 useless extension candidates. Maximal degree in co-relation 22663. Up to 4153 conditions per place. [2024-06-27 17:53:18,788 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 180 selfloop transitions, 20 changer transitions 0/213 dead transitions. [2024-06-27 17:53:18,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 213 transitions, 2421 flow [2024-06-27 17:53:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-27 17:53:18,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-06-27 17:53:18,790 INFO L175 Difference]: Start difference. First operand has 158 places, 189 transitions, 1939 flow. Second operand 5 states and 144 transitions. [2024-06-27 17:53:18,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 213 transitions, 2421 flow [2024-06-27 17:53:18,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 213 transitions, 2262 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:18,959 INFO L231 Difference]: Finished difference. Result has 157 places, 191 transitions, 1859 flow [2024-06-27 17:53:18,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1859, PETRI_PLACES=157, PETRI_TRANSITIONS=191} [2024-06-27 17:53:18,960 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 109 predicate places. [2024-06-27 17:53:18,960 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 191 transitions, 1859 flow [2024-06-27 17:53:18,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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 17:53:18,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:18,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:18,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:53:18,961 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:18,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:18,961 INFO L85 PathProgramCache]: Analyzing trace with hash 104986713, now seen corresponding path program 2 times [2024-06-27 17:53:18,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:18,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331136165] [2024-06-27 17:53:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:18,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:19,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:19,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331136165] [2024-06-27 17:53:19,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331136165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:19,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:19,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:19,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039950993] [2024-06-27 17:53:19,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:19,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:19,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:19,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:19,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 191 transitions, 1859 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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 17:53:19,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:19,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:19,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:19,540 INFO L124 PetriNetUnfolderBase]: 2827/4683 cut-off events. [2024-06-27 17:53:19,540 INFO L125 PetriNetUnfolderBase]: For 89662/89671 co-relation queries the response was YES. [2024-06-27 17:53:19,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21977 conditions, 4683 events. 2827/4683 cut-off events. For 89662/89671 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 30968 event pairs, 1162 based on Foata normal form. 8/4644 useless extension candidates. Maximal degree in co-relation 21906. Up to 4100 conditions per place. [2024-06-27 17:53:19,582 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 177 selfloop transitions, 20 changer transitions 0/210 dead transitions. [2024-06-27 17:53:19,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 210 transitions, 2325 flow [2024-06-27 17:53:19,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-27 17:53:19,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-06-27 17:53:19,584 INFO L175 Difference]: Start difference. First operand has 157 places, 191 transitions, 1859 flow. Second operand 5 states and 137 transitions. [2024-06-27 17:53:19,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 210 transitions, 2325 flow [2024-06-27 17:53:19,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 210 transitions, 2262 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:19,721 INFO L231 Difference]: Finished difference. Result has 159 places, 193 transitions, 1879 flow [2024-06-27 17:53:19,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1879, PETRI_PLACES=159, PETRI_TRANSITIONS=193} [2024-06-27 17:53:19,722 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 111 predicate places. [2024-06-27 17:53:19,722 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 193 transitions, 1879 flow [2024-06-27 17:53:19,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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 17:53:19,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:19,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:19,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:53:19,723 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:19,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:19,723 INFO L85 PathProgramCache]: Analyzing trace with hash -320483905, now seen corresponding path program 1 times [2024-06-27 17:53:19,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:19,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533026799] [2024-06-27 17:53:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:19,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:19,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:19,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533026799] [2024-06-27 17:53:19,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533026799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:19,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:19,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:19,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343078079] [2024-06-27 17:53:19,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:19,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:19,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:19,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:19,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:19,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:19,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 193 transitions, 1879 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:19,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:19,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:19,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:20,502 INFO L124 PetriNetUnfolderBase]: 3701/6005 cut-off events. [2024-06-27 17:53:20,502 INFO L125 PetriNetUnfolderBase]: For 175807/175813 co-relation queries the response was YES. [2024-06-27 17:53:20,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29652 conditions, 6005 events. 3701/6005 cut-off events. For 175807/175813 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 41466 event pairs, 832 based on Foata normal form. 37/6008 useless extension candidates. Maximal degree in co-relation 29580. Up to 3125 conditions per place. [2024-06-27 17:53:20,556 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 136 selfloop transitions, 100 changer transitions 0/249 dead transitions. [2024-06-27 17:53:20,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 249 transitions, 2929 flow [2024-06-27 17:53:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 17:53:20,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7012987012987013 [2024-06-27 17:53:20,558 INFO L175 Difference]: Start difference. First operand has 159 places, 193 transitions, 1879 flow. Second operand 7 states and 216 transitions. [2024-06-27 17:53:20,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 249 transitions, 2929 flow [2024-06-27 17:53:20,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 249 transitions, 2862 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:20,786 INFO L231 Difference]: Finished difference. Result has 164 places, 198 transitions, 2114 flow [2024-06-27 17:53:20,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2114, PETRI_PLACES=164, PETRI_TRANSITIONS=198} [2024-06-27 17:53:20,788 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 116 predicate places. [2024-06-27 17:53:20,789 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 198 transitions, 2114 flow [2024-06-27 17:53:20,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:20,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:20,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:20,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:53:20,789 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:20,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:20,790 INFO L85 PathProgramCache]: Analyzing trace with hash -231770275, now seen corresponding path program 2 times [2024-06-27 17:53:20,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:20,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780086808] [2024-06-27 17:53:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:20,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:20,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:20,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780086808] [2024-06-27 17:53:20,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780086808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:20,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:20,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:20,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161093186] [2024-06-27 17:53:20,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:20,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:20,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:20,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:20,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:20,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:20,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 198 transitions, 2114 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:20,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:20,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:20,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:21,545 INFO L124 PetriNetUnfolderBase]: 4007/6644 cut-off events. [2024-06-27 17:53:21,545 INFO L125 PetriNetUnfolderBase]: For 195639/195645 co-relation queries the response was YES. [2024-06-27 17:53:21,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32711 conditions, 6644 events. 4007/6644 cut-off events. For 195639/195645 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 47367 event pairs, 1359 based on Foata normal form. 43/6653 useless extension candidates. Maximal degree in co-relation 32637. Up to 5082 conditions per place. [2024-06-27 17:53:21,595 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 122 selfloop transitions, 97 changer transitions 0/232 dead transitions. [2024-06-27 17:53:21,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 232 transitions, 2836 flow [2024-06-27 17:53:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 17:53:21,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2024-06-27 17:53:21,597 INFO L175 Difference]: Start difference. First operand has 164 places, 198 transitions, 2114 flow. Second operand 7 states and 203 transitions. [2024-06-27 17:53:21,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 232 transitions, 2836 flow [2024-06-27 17:53:21,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 232 transitions, 2628 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:21,854 INFO L231 Difference]: Finished difference. Result has 168 places, 200 transitions, 2147 flow [2024-06-27 17:53:21,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2147, PETRI_PLACES=168, PETRI_TRANSITIONS=200} [2024-06-27 17:53:21,855 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 120 predicate places. [2024-06-27 17:53:21,855 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 200 transitions, 2147 flow [2024-06-27 17:53:21,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:21,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:21,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:21,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:53:21,856 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:21,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:21,856 INFO L85 PathProgramCache]: Analyzing trace with hash -231918145, now seen corresponding path program 3 times [2024-06-27 17:53:21,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:21,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056643988] [2024-06-27 17:53:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:21,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:21,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:21,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056643988] [2024-06-27 17:53:21,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056643988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:21,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:21,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:21,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693533324] [2024-06-27 17:53:21,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:21,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:21,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:21,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:21,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:21,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:21,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 200 transitions, 2147 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:21,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:21,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:21,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:22,817 INFO L124 PetriNetUnfolderBase]: 4475/7279 cut-off events. [2024-06-27 17:53:22,818 INFO L125 PetriNetUnfolderBase]: For 217069/217075 co-relation queries the response was YES. [2024-06-27 17:53:22,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36377 conditions, 7279 events. 4475/7279 cut-off events. For 217069/217075 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 52558 event pairs, 1277 based on Foata normal form. 37/7282 useless extension candidates. Maximal degree in co-relation 36302. Up to 5072 conditions per place. [2024-06-27 17:53:22,877 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 134 selfloop transitions, 96 changer transitions 0/243 dead transitions. [2024-06-27 17:53:22,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 243 transitions, 3045 flow [2024-06-27 17:53:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:53:22,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6753246753246753 [2024-06-27 17:53:22,879 INFO L175 Difference]: Start difference. First operand has 168 places, 200 transitions, 2147 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:53:22,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 243 transitions, 3045 flow [2024-06-27 17:53:23,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 243 transitions, 2832 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:23,240 INFO L231 Difference]: Finished difference. Result has 171 places, 204 transitions, 2226 flow [2024-06-27 17:53:23,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2226, PETRI_PLACES=171, PETRI_TRANSITIONS=204} [2024-06-27 17:53:23,240 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 123 predicate places. [2024-06-27 17:53:23,240 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 204 transitions, 2226 flow [2024-06-27 17:53:23,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:23,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:23,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:23,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:53:23,241 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:23,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:23,241 INFO L85 PathProgramCache]: Analyzing trace with hash 97368153, now seen corresponding path program 4 times [2024-06-27 17:53:23,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:23,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463395694] [2024-06-27 17:53:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:23,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:23,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:23,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463395694] [2024-06-27 17:53:23,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463395694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:23,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:23,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:23,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585424095] [2024-06-27 17:53:23,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:23,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:23,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:23,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:23,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:23,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:23,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 204 transitions, 2226 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:23,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:23,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:23,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:24,248 INFO L124 PetriNetUnfolderBase]: 4781/7727 cut-off events. [2024-06-27 17:53:24,249 INFO L125 PetriNetUnfolderBase]: For 237805/237814 co-relation queries the response was YES. [2024-06-27 17:53:24,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38543 conditions, 7727 events. 4781/7727 cut-off events. For 237805/237814 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 56069 event pairs, 1411 based on Foata normal form. 48/7752 useless extension candidates. Maximal degree in co-relation 38466. Up to 6454 conditions per place. [2024-06-27 17:53:24,319 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 164 selfloop transitions, 65 changer transitions 0/242 dead transitions. [2024-06-27 17:53:24,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 242 transitions, 2820 flow [2024-06-27 17:53:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:53:24,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6448863636363636 [2024-06-27 17:53:24,321 INFO L175 Difference]: Start difference. First operand has 171 places, 204 transitions, 2226 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:53:24,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 242 transitions, 2820 flow [2024-06-27 17:53:24,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 242 transitions, 2671 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:24,701 INFO L231 Difference]: Finished difference. Result has 176 places, 206 transitions, 2260 flow [2024-06-27 17:53:24,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2260, PETRI_PLACES=176, PETRI_TRANSITIONS=206} [2024-06-27 17:53:24,702 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 128 predicate places. [2024-06-27 17:53:24,702 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 206 transitions, 2260 flow [2024-06-27 17:53:24,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:24,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:24,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:24,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:53:24,702 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:24,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash -101933637, now seen corresponding path program 5 times [2024-06-27 17:53:24,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:24,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654055180] [2024-06-27 17:53:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:24,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:24,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:24,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654055180] [2024-06-27 17:53:24,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654055180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:24,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:24,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:24,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004869559] [2024-06-27 17:53:24,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:24,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:24,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:24,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:24,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:24,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:24,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 206 transitions, 2260 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:24,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:24,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:24,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:25,648 INFO L124 PetriNetUnfolderBase]: 5064/8191 cut-off events. [2024-06-27 17:53:25,649 INFO L125 PetriNetUnfolderBase]: For 247000/247009 co-relation queries the response was YES. [2024-06-27 17:53:25,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40438 conditions, 8191 events. 5064/8191 cut-off events. For 247000/247009 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 60129 event pairs, 1505 based on Foata normal form. 48/8215 useless extension candidates. Maximal degree in co-relation 40359. Up to 6895 conditions per place. [2024-06-27 17:53:25,717 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 164 selfloop transitions, 67 changer transitions 0/244 dead transitions. [2024-06-27 17:53:25,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 244 transitions, 2864 flow [2024-06-27 17:53:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:53:25,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6655844155844156 [2024-06-27 17:53:25,724 INFO L175 Difference]: Start difference. First operand has 176 places, 206 transitions, 2260 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:53:25,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 244 transitions, 2864 flow [2024-06-27 17:53:26,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 244 transitions, 2707 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:26,164 INFO L231 Difference]: Finished difference. Result has 177 places, 208 transitions, 2294 flow [2024-06-27 17:53:26,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2294, PETRI_PLACES=177, PETRI_TRANSITIONS=208} [2024-06-27 17:53:26,165 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 129 predicate places. [2024-06-27 17:53:26,165 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 208 transitions, 2294 flow [2024-06-27 17:53:26,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:26,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:26,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:26,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:53:26,165 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:26,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:26,166 INFO L85 PathProgramCache]: Analyzing trace with hash -102081507, now seen corresponding path program 6 times [2024-06-27 17:53:26,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:26,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969015431] [2024-06-27 17:53:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:26,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:26,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:26,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969015431] [2024-06-27 17:53:26,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969015431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:26,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:26,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:26,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316618881] [2024-06-27 17:53:26,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:26,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:26,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:26,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:26,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 208 transitions, 2294 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:26,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:26,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:26,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:27,173 INFO L124 PetriNetUnfolderBase]: 5597/9214 cut-off events. [2024-06-27 17:53:27,173 INFO L125 PetriNetUnfolderBase]: For 281765/281774 co-relation queries the response was YES. [2024-06-27 17:53:27,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44644 conditions, 9214 events. 5597/9214 cut-off events. For 281765/281774 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 70363 event pairs, 1544 based on Foata normal form. 42/9229 useless extension candidates. Maximal degree in co-relation 44564. Up to 5900 conditions per place. [2024-06-27 17:53:27,255 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 170 selfloop transitions, 74 changer transitions 0/257 dead transitions. [2024-06-27 17:53:27,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 257 transitions, 3072 flow [2024-06-27 17:53:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 17:53:27,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6948051948051948 [2024-06-27 17:53:27,256 INFO L175 Difference]: Start difference. First operand has 177 places, 208 transitions, 2294 flow. Second operand 7 states and 214 transitions. [2024-06-27 17:53:27,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 257 transitions, 3072 flow [2024-06-27 17:53:27,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 257 transitions, 2907 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:27,733 INFO L231 Difference]: Finished difference. Result has 180 places, 211 transitions, 2386 flow [2024-06-27 17:53:27,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=180, PETRI_TRANSITIONS=211} [2024-06-27 17:53:27,734 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 132 predicate places. [2024-06-27 17:53:27,734 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 211 transitions, 2386 flow [2024-06-27 17:53:27,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:27,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:27,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:27,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:53:27,735 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:27,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:27,735 INFO L85 PathProgramCache]: Analyzing trace with hash 104992665, now seen corresponding path program 1 times [2024-06-27 17:53:27,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:27,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121162187] [2024-06-27 17:53:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:27,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:27,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:27,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121162187] [2024-06-27 17:53:27,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121162187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:27,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:27,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534146047] [2024-06-27 17:53:27,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:27,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:27,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:27,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:27,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:27,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:27,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 211 transitions, 2386 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:27,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:27,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:27,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:28,885 INFO L124 PetriNetUnfolderBase]: 6123/9971 cut-off events. [2024-06-27 17:53:28,886 INFO L125 PetriNetUnfolderBase]: For 322057/322066 co-relation queries the response was YES. [2024-06-27 17:53:28,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48919 conditions, 9971 events. 6123/9971 cut-off events. For 322057/322066 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 76918 event pairs, 1873 based on Foata normal form. 42/10001 useless extension candidates. Maximal degree in co-relation 48837. Up to 7083 conditions per place. [2024-06-27 17:53:28,975 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 176 selfloop transitions, 67 changer transitions 0/256 dead transitions. [2024-06-27 17:53:28,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 256 transitions, 3124 flow [2024-06-27 17:53:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 17:53:28,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2024-06-27 17:53:28,976 INFO L175 Difference]: Start difference. First operand has 180 places, 211 transitions, 2386 flow. Second operand 8 states and 232 transitions. [2024-06-27 17:53:28,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 256 transitions, 3124 flow [2024-06-27 17:53:29,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 256 transitions, 2860 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:29,671 INFO L231 Difference]: Finished difference. Result has 183 places, 213 transitions, 2323 flow [2024-06-27 17:53:29,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2323, PETRI_PLACES=183, PETRI_TRANSITIONS=213} [2024-06-27 17:53:29,672 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 135 predicate places. [2024-06-27 17:53:29,673 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 213 transitions, 2323 flow [2024-06-27 17:53:29,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:29,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:29,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:29,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:53:29,677 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:29,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:29,677 INFO L85 PathProgramCache]: Analyzing trace with hash 989102701, now seen corresponding path program 1 times [2024-06-27 17:53:29,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:29,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043434953] [2024-06-27 17:53:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:29,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:29,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:29,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043434953] [2024-06-27 17:53:29,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043434953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:29,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:29,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:53:29,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316664262] [2024-06-27 17:53:29,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:29,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:53:29,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:29,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:53:29,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:53:29,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 44 [2024-06-27 17:53:29,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 213 transitions, 2323 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:29,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:29,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 44 [2024-06-27 17:53:29,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:30,918 INFO L124 PetriNetUnfolderBase]: 5488/11587 cut-off events. [2024-06-27 17:53:30,918 INFO L125 PetriNetUnfolderBase]: For 69173/69672 co-relation queries the response was YES. [2024-06-27 17:53:30,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34200 conditions, 11587 events. 5488/11587 cut-off events. For 69173/69672 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 113866 event pairs, 1122 based on Foata normal form. 555/11600 useless extension candidates. Maximal degree in co-relation 34117. Up to 4490 conditions per place. [2024-06-27 17:53:30,994 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 30 selfloop transitions, 64 changer transitions 0/227 dead transitions. [2024-06-27 17:53:30,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 227 transitions, 2557 flow [2024-06-27 17:53:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:53:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:53:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-27 17:53:30,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7556818181818182 [2024-06-27 17:53:30,996 INFO L175 Difference]: Start difference. First operand has 183 places, 213 transitions, 2323 flow. Second operand 4 states and 133 transitions. [2024-06-27 17:53:30,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 227 transitions, 2557 flow [2024-06-27 17:53:31,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 227 transitions, 2355 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:31,196 INFO L231 Difference]: Finished difference. Result has 182 places, 214 transitions, 2383 flow [2024-06-27 17:53:31,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2383, PETRI_PLACES=182, PETRI_TRANSITIONS=214} [2024-06-27 17:53:31,196 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 134 predicate places. [2024-06-27 17:53:31,197 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 214 transitions, 2383 flow [2024-06-27 17:53:31,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:31,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:31,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:31,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:53:31,197 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:31,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash -890090121, now seen corresponding path program 1 times [2024-06-27 17:53:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:31,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588715362] [2024-06-27 17:53:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:31,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:31,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:31,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588715362] [2024-06-27 17:53:31,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588715362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:31,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:31,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:31,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452788981] [2024-06-27 17:53:31,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:31,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:31,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:31,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:31,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:31,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:31,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 214 transitions, 2383 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:31,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:31,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:31,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:32,422 INFO L124 PetriNetUnfolderBase]: 6569/11274 cut-off events. [2024-06-27 17:53:32,422 INFO L125 PetriNetUnfolderBase]: For 298716/298784 co-relation queries the response was YES. [2024-06-27 17:53:32,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52740 conditions, 11274 events. 6569/11274 cut-off events. For 298716/298784 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 93456 event pairs, 3547 based on Foata normal form. 35/10918 useless extension candidates. Maximal degree in co-relation 52656. Up to 10077 conditions per place. [2024-06-27 17:53:32,548 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 133 selfloop transitions, 91 changer transitions 0/238 dead transitions. [2024-06-27 17:53:32,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 238 transitions, 3114 flow [2024-06-27 17:53:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:53:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:53:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 17:53:32,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782828282828283 [2024-06-27 17:53:32,550 INFO L175 Difference]: Start difference. First operand has 182 places, 214 transitions, 2383 flow. Second operand 9 states and 229 transitions. [2024-06-27 17:53:32,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 238 transitions, 3114 flow [2024-06-27 17:53:33,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 238 transitions, 3040 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:53:33,159 INFO L231 Difference]: Finished difference. Result has 189 places, 217 transitions, 2546 flow [2024-06-27 17:53:33,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2546, PETRI_PLACES=189, PETRI_TRANSITIONS=217} [2024-06-27 17:53:33,160 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 141 predicate places. [2024-06-27 17:53:33,160 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 217 transitions, 2546 flow [2024-06-27 17:53:33,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:33,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:33,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:33,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:53:33,160 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:33,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:33,161 INFO L85 PathProgramCache]: Analyzing trace with hash -830315755, now seen corresponding path program 2 times [2024-06-27 17:53:33,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:33,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419047083] [2024-06-27 17:53:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:33,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:33,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:33,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419047083] [2024-06-27 17:53:33,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419047083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:33,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:33,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:33,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393787765] [2024-06-27 17:53:33,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:33,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:33,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:33,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:33,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 217 transitions, 2546 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:33,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:33,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:33,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:34,376 INFO L124 PetriNetUnfolderBase]: 6566/11270 cut-off events. [2024-06-27 17:53:34,376 INFO L125 PetriNetUnfolderBase]: For 297273/297337 co-relation queries the response was YES. [2024-06-27 17:53:34,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53024 conditions, 11270 events. 6566/11270 cut-off events. For 297273/297337 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 93415 event pairs, 3547 based on Foata normal form. 33/10912 useless extension candidates. Maximal degree in co-relation 52939. Up to 10074 conditions per place. [2024-06-27 17:53:34,487 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 131 selfloop transitions, 90 changer transitions 0/235 dead transitions. [2024-06-27 17:53:34,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 235 transitions, 3126 flow [2024-06-27 17:53:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 17:53:34,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 17:53:34,489 INFO L175 Difference]: Start difference. First operand has 189 places, 217 transitions, 2546 flow. Second operand 7 states and 187 transitions. [2024-06-27 17:53:34,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 235 transitions, 3126 flow [2024-06-27 17:53:35,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 235 transitions, 2793 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:35,139 INFO L231 Difference]: Finished difference. Result has 187 places, 217 transitions, 2399 flow [2024-06-27 17:53:35,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2399, PETRI_PLACES=187, PETRI_TRANSITIONS=217} [2024-06-27 17:53:35,139 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 139 predicate places. [2024-06-27 17:53:35,139 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 217 transitions, 2399 flow [2024-06-27 17:53:35,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:35,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:35,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:35,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:53:35,140 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:35,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1066583371, now seen corresponding path program 1 times [2024-06-27 17:53:35,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:35,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218644489] [2024-06-27 17:53:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:35,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:35,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:35,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218644489] [2024-06-27 17:53:35,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218644489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:35,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:35,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:35,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90623002] [2024-06-27 17:53:35,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:35,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:35,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:35,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:35,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:35,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:35,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 217 transitions, 2399 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:35,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:35,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:35,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:36,598 INFO L124 PetriNetUnfolderBase]: 7415/12954 cut-off events. [2024-06-27 17:53:36,603 INFO L125 PetriNetUnfolderBase]: For 418000/418068 co-relation queries the response was YES. [2024-06-27 17:53:36,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61194 conditions, 12954 events. 7415/12954 cut-off events. For 418000/418068 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 111075 event pairs, 3786 based on Foata normal form. 62/12611 useless extension candidates. Maximal degree in co-relation 61109. Up to 8235 conditions per place. [2024-06-27 17:53:36,715 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 152 selfloop transitions, 98 changer transitions 0/264 dead transitions. [2024-06-27 17:53:36,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 264 transitions, 3305 flow [2024-06-27 17:53:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:53:36,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.672077922077922 [2024-06-27 17:53:36,719 INFO L175 Difference]: Start difference. First operand has 187 places, 217 transitions, 2399 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:53:36,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 264 transitions, 3305 flow [2024-06-27 17:53:37,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 264 transitions, 3125 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:37,580 INFO L231 Difference]: Finished difference. Result has 189 places, 220 transitions, 2524 flow [2024-06-27 17:53:37,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2524, PETRI_PLACES=189, PETRI_TRANSITIONS=220} [2024-06-27 17:53:37,584 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 141 predicate places. [2024-06-27 17:53:37,584 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 220 transitions, 2524 flow [2024-06-27 17:53:37,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:37,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:37,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:37,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:53:37,585 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:37,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash -830408011, now seen corresponding path program 2 times [2024-06-27 17:53:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:37,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203650200] [2024-06-27 17:53:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:37,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:37,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:37,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203650200] [2024-06-27 17:53:37,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203650200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:37,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:37,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:37,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851251061] [2024-06-27 17:53:37,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:37,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:37,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:37,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:37,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:37,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:37,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 220 transitions, 2524 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:37,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:37,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:37,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:39,225 INFO L124 PetriNetUnfolderBase]: 7970/13783 cut-off events. [2024-06-27 17:53:39,225 INFO L125 PetriNetUnfolderBase]: For 481116/481184 co-relation queries the response was YES. [2024-06-27 17:53:39,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66963 conditions, 13783 events. 7970/13783 cut-off events. For 481116/481184 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 118787 event pairs, 4416 based on Foata normal form. 62/13409 useless extension candidates. Maximal degree in co-relation 66876. Up to 11326 conditions per place. [2024-06-27 17:53:39,330 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 150 selfloop transitions, 93 changer transitions 0/257 dead transitions. [2024-06-27 17:53:39,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 257 transitions, 3370 flow [2024-06-27 17:53:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:53:39,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6493506493506493 [2024-06-27 17:53:39,332 INFO L175 Difference]: Start difference. First operand has 189 places, 220 transitions, 2524 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:53:39,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 257 transitions, 3370 flow [2024-06-27 17:53:40,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 257 transitions, 3239 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:40,378 INFO L231 Difference]: Finished difference. Result has 193 places, 222 transitions, 2635 flow [2024-06-27 17:53:40,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2393, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2635, PETRI_PLACES=193, PETRI_TRANSITIONS=222} [2024-06-27 17:53:40,379 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 145 predicate places. [2024-06-27 17:53:40,379 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 222 transitions, 2635 flow [2024-06-27 17:53:40,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:40,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:40,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:40,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:53:40,379 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:40,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:40,382 INFO L85 PathProgramCache]: Analyzing trace with hash -830111341, now seen corresponding path program 3 times [2024-06-27 17:53:40,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:40,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995132092] [2024-06-27 17:53:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:40,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:40,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:40,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995132092] [2024-06-27 17:53:40,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995132092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:40,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:40,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:40,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291176715] [2024-06-27 17:53:40,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:40,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:40,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:40,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:40,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:40,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:40,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 222 transitions, 2635 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:40,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:40,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:40,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:42,111 INFO L124 PetriNetUnfolderBase]: 7901/13644 cut-off events. [2024-06-27 17:53:42,111 INFO L125 PetriNetUnfolderBase]: For 459779/459847 co-relation queries the response was YES. [2024-06-27 17:53:42,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65407 conditions, 13644 events. 7901/13644 cut-off events. For 459779/459847 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 117713 event pairs, 4560 based on Foata normal form. 66/13275 useless extension candidates. Maximal degree in co-relation 65318. Up to 11817 conditions per place. [2024-06-27 17:53:42,231 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 143 selfloop transitions, 91 changer transitions 0/248 dead transitions. [2024-06-27 17:53:42,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 248 transitions, 3281 flow [2024-06-27 17:53:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-27 17:53:42,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2024-06-27 17:53:42,245 INFO L175 Difference]: Start difference. First operand has 193 places, 222 transitions, 2635 flow. Second operand 7 states and 192 transitions. [2024-06-27 17:53:42,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 248 transitions, 3281 flow [2024-06-27 17:53:43,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 248 transitions, 3135 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:43,584 INFO L231 Difference]: Finished difference. Result has 197 places, 222 transitions, 2677 flow [2024-06-27 17:53:43,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2677, PETRI_PLACES=197, PETRI_TRANSITIONS=222} [2024-06-27 17:53:43,584 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 149 predicate places. [2024-06-27 17:53:43,584 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 222 transitions, 2677 flow [2024-06-27 17:53:43,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:43,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:43,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:43,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:53:43,585 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:43,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1520343895, now seen corresponding path program 1 times [2024-06-27 17:53:43,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:43,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844869181] [2024-06-27 17:53:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:43,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:43,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:43,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844869181] [2024-06-27 17:53:43,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844869181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:43,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:43,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:43,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097963346] [2024-06-27 17:53:43,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:43,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:43,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:43,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:43,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:43,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:43,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 222 transitions, 2677 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:43,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:43,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:43,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:45,318 INFO L124 PetriNetUnfolderBase]: 8026/14101 cut-off events. [2024-06-27 17:53:45,318 INFO L125 PetriNetUnfolderBase]: For 451572/451595 co-relation queries the response was YES. [2024-06-27 17:53:45,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67520 conditions, 14101 events. 8026/14101 cut-off events. For 451572/451595 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 122530 event pairs, 4147 based on Foata normal form. 16/13633 useless extension candidates. Maximal degree in co-relation 67429. Up to 11259 conditions per place. [2024-06-27 17:53:45,455 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 144 selfloop transitions, 110 changer transitions 0/268 dead transitions. [2024-06-27 17:53:45,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 268 transitions, 3644 flow [2024-06-27 17:53:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:53:45,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6753246753246753 [2024-06-27 17:53:45,457 INFO L175 Difference]: Start difference. First operand has 197 places, 222 transitions, 2677 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:53:45,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 268 transitions, 3644 flow [2024-06-27 17:53:46,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 268 transitions, 3456 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:46,725 INFO L231 Difference]: Finished difference. Result has 199 places, 229 transitions, 2879 flow [2024-06-27 17:53:46,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2879, PETRI_PLACES=199, PETRI_TRANSITIONS=229} [2024-06-27 17:53:46,728 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 151 predicate places. [2024-06-27 17:53:46,728 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 229 transitions, 2879 flow [2024-06-27 17:53:46,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:46,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:46,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:46,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:53:46,728 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:46,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1505495929, now seen corresponding path program 2 times [2024-06-27 17:53:46,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:46,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4345784] [2024-06-27 17:53:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:46,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:46,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:46,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4345784] [2024-06-27 17:53:46,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4345784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:46,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:46,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:46,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854206437] [2024-06-27 17:53:46,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:46,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:46,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:46,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 229 transitions, 2879 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:46,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:46,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:46,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:48,827 INFO L124 PetriNetUnfolderBase]: 7981/13790 cut-off events. [2024-06-27 17:53:48,827 INFO L125 PetriNetUnfolderBase]: For 457441/457468 co-relation queries the response was YES. [2024-06-27 17:53:48,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67660 conditions, 13790 events. 7981/13790 cut-off events. For 457441/457468 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 118818 event pairs, 4404 based on Foata normal form. 16/13356 useless extension candidates. Maximal degree in co-relation 67567. Up to 12241 conditions per place. [2024-06-27 17:53:48,924 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 138 selfloop transitions, 104 changer transitions 0/256 dead transitions. [2024-06-27 17:53:48,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 256 transitions, 3545 flow [2024-06-27 17:53:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 17:53:48,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6396103896103896 [2024-06-27 17:53:48,925 INFO L175 Difference]: Start difference. First operand has 199 places, 229 transitions, 2879 flow. Second operand 7 states and 197 transitions. [2024-06-27 17:53:48,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 256 transitions, 3545 flow [2024-06-27 17:53:50,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 256 transitions, 3316 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:50,359 INFO L231 Difference]: Finished difference. Result has 202 places, 229 transitions, 2864 flow [2024-06-27 17:53:50,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2864, PETRI_PLACES=202, PETRI_TRANSITIONS=229} [2024-06-27 17:53:50,360 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 154 predicate places. [2024-06-27 17:53:50,360 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 229 transitions, 2864 flow [2024-06-27 17:53:50,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:50,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:50,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:50,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 17:53:50,361 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:50,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:50,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1582532619, now seen corresponding path program 3 times [2024-06-27 17:53:50,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:50,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044094729] [2024-06-27 17:53:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:50,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:50,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:50,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044094729] [2024-06-27 17:53:50,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044094729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:50,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:50,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:50,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128084181] [2024-06-27 17:53:50,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:50,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:50,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:50,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:50,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:50,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:50,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 229 transitions, 2864 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:50,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:50,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:50,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:52,536 INFO L124 PetriNetUnfolderBase]: 7989/13709 cut-off events. [2024-06-27 17:53:52,536 INFO L125 PetriNetUnfolderBase]: For 456517/456550 co-relation queries the response was YES. [2024-06-27 17:53:52,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67348 conditions, 13709 events. 7989/13709 cut-off events. For 456517/456550 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 117533 event pairs, 4512 based on Foata normal form. 14/13256 useless extension candidates. Maximal degree in co-relation 67254. Up to 12344 conditions per place. [2024-06-27 17:53:52,653 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 134 selfloop transitions, 99 changer transitions 0/247 dead transitions. [2024-06-27 17:53:52,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 247 transitions, 3520 flow [2024-06-27 17:53:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 17:53:52,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038961038961039 [2024-06-27 17:53:52,654 INFO L175 Difference]: Start difference. First operand has 202 places, 229 transitions, 2864 flow. Second operand 7 states and 186 transitions. [2024-06-27 17:53:52,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 247 transitions, 3520 flow [2024-06-27 17:53:53,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 247 transitions, 3290 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:53,838 INFO L231 Difference]: Finished difference. Result has 204 places, 232 transitions, 2888 flow [2024-06-27 17:53:53,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2640, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2888, PETRI_PLACES=204, PETRI_TRANSITIONS=232} [2024-06-27 17:53:53,839 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 156 predicate places. [2024-06-27 17:53:53,839 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 232 transitions, 2888 flow [2024-06-27 17:53:53,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:53,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:53,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:53,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 17:53:53,840 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:53,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1915890045, now seen corresponding path program 3 times [2024-06-27 17:53:53,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:53,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100994569] [2024-06-27 17:53:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:53,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:53,945 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 17:53:53,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:53,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100994569] [2024-06-27 17:53:53,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100994569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:53,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:53,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:53,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707647012] [2024-06-27 17:53:53,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:53,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:53,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:53,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:53,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 232 transitions, 2888 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:53,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:53,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:53,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:55,934 INFO L124 PetriNetUnfolderBase]: 8084/13941 cut-off events. [2024-06-27 17:53:55,935 INFO L125 PetriNetUnfolderBase]: For 486407/486418 co-relation queries the response was YES. [2024-06-27 17:53:56,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68316 conditions, 13941 events. 8084/13941 cut-off events. For 486407/486418 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 119749 event pairs, 4427 based on Foata normal form. 16/13476 useless extension candidates. Maximal degree in co-relation 68221. Up to 12618 conditions per place. [2024-06-27 17:53:56,169 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 215 selfloop transitions, 29 changer transitions 0/258 dead transitions. [2024-06-27 17:53:56,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 258 transitions, 3489 flow [2024-06-27 17:53:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 17:53:56,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-27 17:53:56,178 INFO L175 Difference]: Start difference. First operand has 204 places, 232 transitions, 2888 flow. Second operand 8 states and 208 transitions. [2024-06-27 17:53:56,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 258 transitions, 3489 flow [2024-06-27 17:53:57,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 258 transitions, 3314 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:57,079 INFO L231 Difference]: Finished difference. Result has 208 places, 234 transitions, 2824 flow [2024-06-27 17:53:57,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2824, PETRI_PLACES=208, PETRI_TRANSITIONS=234} [2024-06-27 17:53:57,080 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 160 predicate places. [2024-06-27 17:53:57,080 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 234 transitions, 2824 flow [2024-06-27 17:53:57,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:57,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:57,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:57,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 17:53:57,080 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:57,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash -154782257, now seen corresponding path program 4 times [2024-06-27 17:53:57,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:57,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117677411] [2024-06-27 17:53:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:57,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:57,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:57,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117677411] [2024-06-27 17:53:57,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117677411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:57,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:57,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:57,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62422692] [2024-06-27 17:53:57,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:57,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:57,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:57,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:57,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:57,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:53:57,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 234 transitions, 2824 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:57,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:57,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:53:57,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:59,229 INFO L124 PetriNetUnfolderBase]: 8081/13865 cut-off events. [2024-06-27 17:53:59,229 INFO L125 PetriNetUnfolderBase]: For 488172/488205 co-relation queries the response was YES. [2024-06-27 17:53:59,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68360 conditions, 13865 events. 8081/13865 cut-off events. For 488172/488205 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 118909 event pairs, 4500 based on Foata normal form. 14/13403 useless extension candidates. Maximal degree in co-relation 68264. Up to 12486 conditions per place. [2024-06-27 17:53:59,340 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 132 selfloop transitions, 104 changer transitions 0/250 dead transitions. [2024-06-27 17:53:59,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 250 transitions, 3334 flow [2024-06-27 17:53:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:53:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:53:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 17:53:59,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782828282828283 [2024-06-27 17:53:59,341 INFO L175 Difference]: Start difference. First operand has 208 places, 234 transitions, 2824 flow. Second operand 9 states and 229 transitions. [2024-06-27 17:53:59,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 250 transitions, 3334 flow [2024-06-27 17:54:00,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 250 transitions, 3256 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:00,542 INFO L231 Difference]: Finished difference. Result has 211 places, 234 transitions, 2960 flow [2024-06-27 17:54:00,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2746, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2960, PETRI_PLACES=211, PETRI_TRANSITIONS=234} [2024-06-27 17:54:00,544 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 163 predicate places. [2024-06-27 17:54:00,545 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 234 transitions, 2960 flow [2024-06-27 17:54:00,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:00,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:00,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:00,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 17:54:00,545 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:00,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:00,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1922200777, now seen corresponding path program 4 times [2024-06-27 17:54:00,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:00,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513888003] [2024-06-27 17:54:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:00,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:00,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:00,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513888003] [2024-06-27 17:54:00,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513888003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:00,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:00,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:00,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115363527] [2024-06-27 17:54:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:00,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:00,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:00,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:00,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:54:00,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 234 transitions, 2960 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:00,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:00,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:54:00,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:02,700 INFO L124 PetriNetUnfolderBase]: 8358/14372 cut-off events. [2024-06-27 17:54:02,701 INFO L125 PetriNetUnfolderBase]: For 556784/556813 co-relation queries the response was YES. [2024-06-27 17:54:02,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70576 conditions, 14372 events. 8358/14372 cut-off events. For 556784/556813 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 124212 event pairs, 4684 based on Foata normal form. 54/13930 useless extension candidates. Maximal degree in co-relation 70479. Up to 12585 conditions per place. [2024-06-27 17:54:03,018 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 183 selfloop transitions, 64 changer transitions 0/261 dead transitions. [2024-06-27 17:54:03,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 261 transitions, 3557 flow [2024-06-27 17:54:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 17:54:03,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107954545454546 [2024-06-27 17:54:03,019 INFO L175 Difference]: Start difference. First operand has 211 places, 234 transitions, 2960 flow. Second operand 8 states and 215 transitions. [2024-06-27 17:54:03,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 261 transitions, 3557 flow [2024-06-27 17:54:04,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 261 transitions, 3207 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 17:54:04,085 INFO L231 Difference]: Finished difference. Result has 208 places, 235 transitions, 2771 flow [2024-06-27 17:54:04,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2771, PETRI_PLACES=208, PETRI_TRANSITIONS=235} [2024-06-27 17:54:04,086 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 160 predicate places. [2024-06-27 17:54:04,086 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 235 transitions, 2771 flow [2024-06-27 17:54:04,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:04,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:04,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:04,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 17:54:04,086 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:04,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1912369747, now seen corresponding path program 5 times [2024-06-27 17:54:04,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:04,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914249490] [2024-06-27 17:54:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:04,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:04,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:04,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914249490] [2024-06-27 17:54:04,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914249490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:04,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:04,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:04,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675298893] [2024-06-27 17:54:04,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:04,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:04,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:04,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:04,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:54:04,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 235 transitions, 2771 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:04,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:04,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:54:04,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:06,061 INFO L124 PetriNetUnfolderBase]: 8282/14284 cut-off events. [2024-06-27 17:54:06,061 INFO L125 PetriNetUnfolderBase]: For 519692/519728 co-relation queries the response was YES. [2024-06-27 17:54:06,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68417 conditions, 14284 events. 8282/14284 cut-off events. For 519692/519728 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 123163 event pairs, 4540 based on Foata normal form. 56/13842 useless extension candidates. Maximal degree in co-relation 68321. Up to 12469 conditions per place. [2024-06-27 17:54:06,368 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 186 selfloop transitions, 63 changer transitions 0/263 dead transitions. [2024-06-27 17:54:06,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 263 transitions, 3353 flow [2024-06-27 17:54:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 17:54:06,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331168831168831 [2024-06-27 17:54:06,369 INFO L175 Difference]: Start difference. First operand has 208 places, 235 transitions, 2771 flow. Second operand 7 states and 195 transitions. [2024-06-27 17:54:06,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 263 transitions, 3353 flow [2024-06-27 17:54:07,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 263 transitions, 3215 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:07,286 INFO L231 Difference]: Finished difference. Result has 209 places, 235 transitions, 2765 flow [2024-06-27 17:54:07,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2765, PETRI_PLACES=209, PETRI_TRANSITIONS=235} [2024-06-27 17:54:07,287 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 161 predicate places. [2024-06-27 17:54:07,287 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 235 transitions, 2765 flow [2024-06-27 17:54:07,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:07,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:07,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:07,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 17:54:07,288 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:07,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1912073077, now seen corresponding path program 6 times [2024-06-27 17:54:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:07,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136518607] [2024-06-27 17:54:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:07,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:07,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136518607] [2024-06-27 17:54:07,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136518607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:07,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:07,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:07,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974139637] [2024-06-27 17:54:07,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:07,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:07,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:07,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:07,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:07,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:54:07,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 235 transitions, 2765 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:07,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:07,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:54:07,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:09,553 INFO L124 PetriNetUnfolderBase]: 8451/14792 cut-off events. [2024-06-27 17:54:09,554 INFO L125 PetriNetUnfolderBase]: For 516431/516460 co-relation queries the response was YES. [2024-06-27 17:54:09,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69088 conditions, 14792 events. 8451/14792 cut-off events. For 516431/516460 co-relation queries the response was YES. Maximal size of possible extension queue 1214. Compared 130048 event pairs, 4279 based on Foata normal form. 52/14350 useless extension candidates. Maximal degree in co-relation 68991. Up to 11087 conditions per place. [2024-06-27 17:54:09,673 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 191 selfloop transitions, 69 changer transitions 0/274 dead transitions. [2024-06-27 17:54:09,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 274 transitions, 3411 flow [2024-06-27 17:54:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:54:09,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6655844155844156 [2024-06-27 17:54:09,674 INFO L175 Difference]: Start difference. First operand has 209 places, 235 transitions, 2765 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:54:09,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 274 transitions, 3411 flow [2024-06-27 17:54:10,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 274 transitions, 3273 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:10,558 INFO L231 Difference]: Finished difference. Result has 211 places, 235 transitions, 2770 flow [2024-06-27 17:54:10,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2627, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2770, PETRI_PLACES=211, PETRI_TRANSITIONS=235} [2024-06-27 17:54:10,558 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 163 predicate places. [2024-06-27 17:54:10,558 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 235 transitions, 2770 flow [2024-06-27 17:54:10,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:10,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:10,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:10,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 17:54:10,559 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:10,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:10,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1922569739, now seen corresponding path program 1 times [2024-06-27 17:54:10,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:10,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879413583] [2024-06-27 17:54:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:10,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:10,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:10,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879413583] [2024-06-27 17:54:10,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879413583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:10,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:10,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:10,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351112557] [2024-06-27 17:54:10,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:10,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:10,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:10,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:10,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:54:10,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 235 transitions, 2770 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:10,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:10,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:54:10,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:12,808 INFO L124 PetriNetUnfolderBase]: 8377/14408 cut-off events. [2024-06-27 17:54:12,809 INFO L125 PetriNetUnfolderBase]: For 479651/479680 co-relation queries the response was YES. [2024-06-27 17:54:13,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66922 conditions, 14408 events. 8377/14408 cut-off events. For 479651/479680 co-relation queries the response was YES. Maximal size of possible extension queue 1200. Compared 124478 event pairs, 4461 based on Foata normal form. 50/13962 useless extension candidates. Maximal degree in co-relation 66824. Up to 10163 conditions per place. [2024-06-27 17:54:13,230 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 186 selfloop transitions, 69 changer transitions 0/269 dead transitions. [2024-06-27 17:54:13,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 269 transitions, 3392 flow [2024-06-27 17:54:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-27 17:54:13,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306818181818182 [2024-06-27 17:54:13,231 INFO L175 Difference]: Start difference. First operand has 211 places, 235 transitions, 2770 flow. Second operand 8 states and 222 transitions. [2024-06-27 17:54:13,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 269 transitions, 3392 flow [2024-06-27 17:54:14,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 269 transitions, 3117 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 17:54:14,290 INFO L231 Difference]: Finished difference. Result has 212 places, 235 transitions, 2640 flow [2024-06-27 17:54:14,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2640, PETRI_PLACES=212, PETRI_TRANSITIONS=235} [2024-06-27 17:54:14,291 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 164 predicate places. [2024-06-27 17:54:14,291 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 235 transitions, 2640 flow [2024-06-27 17:54:14,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:14,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:14,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:14,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 17:54:14,292 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:14,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash -87055495, now seen corresponding path program 4 times [2024-06-27 17:54:14,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:14,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876733235] [2024-06-27 17:54:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:14,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:14,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:14,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876733235] [2024-06-27 17:54:14,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876733235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:14,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:14,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:14,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542208392] [2024-06-27 17:54:14,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:14,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:14,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:14,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:14,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:54:14,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 235 transitions, 2640 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:14,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:14,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:54:14,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:16,412 INFO L124 PetriNetUnfolderBase]: 8634/14810 cut-off events. [2024-06-27 17:54:16,413 INFO L125 PetriNetUnfolderBase]: For 480860/480905 co-relation queries the response was YES. [2024-06-27 17:54:16,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70129 conditions, 14810 events. 8634/14810 cut-off events. For 480860/480905 co-relation queries the response was YES. Maximal size of possible extension queue 1232. Compared 128205 event pairs, 4845 based on Foata normal form. 15/14327 useless extension candidates. Maximal degree in co-relation 70031. Up to 13085 conditions per place. [2024-06-27 17:54:16,528 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 147 selfloop transitions, 110 changer transitions 0/271 dead transitions. [2024-06-27 17:54:16,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 271 transitions, 3487 flow [2024-06-27 17:54:16,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:54:16,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:54:16,529 INFO L175 Difference]: Start difference. First operand has 212 places, 235 transitions, 2640 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:54:16,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 271 transitions, 3487 flow [2024-06-27 17:54:17,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 271 transitions, 3288 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 17:54:17,479 INFO L231 Difference]: Finished difference. Result has 212 places, 241 transitions, 2815 flow [2024-06-27 17:54:17,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2815, PETRI_PLACES=212, PETRI_TRANSITIONS=241} [2024-06-27 17:54:17,479 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 164 predicate places. [2024-06-27 17:54:17,479 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 241 transitions, 2815 flow [2024-06-27 17:54:17,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:17,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:17,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:17,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 17:54:17,480 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:17,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:17,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1338678373, now seen corresponding path program 5 times [2024-06-27 17:54:17,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:17,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185803024] [2024-06-27 17:54:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:17,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:17,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:17,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185803024] [2024-06-27 17:54:17,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185803024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:17,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:17,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:17,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936442334] [2024-06-27 17:54:17,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:17,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:17,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:17,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:17,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:17,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:54:17,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 241 transitions, 2815 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:17,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:17,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:54:17,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:19,728 INFO L124 PetriNetUnfolderBase]: 8655/14847 cut-off events. [2024-06-27 17:54:19,729 INFO L125 PetriNetUnfolderBase]: For 496604/496641 co-relation queries the response was YES. [2024-06-27 17:54:19,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70767 conditions, 14847 events. 8655/14847 cut-off events. For 496604/496641 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 128830 event pairs, 4857 based on Foata normal form. 15/14361 useless extension candidates. Maximal degree in co-relation 70668. Up to 13382 conditions per place. [2024-06-27 17:54:19,850 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 144 selfloop transitions, 105 changer transitions 0/263 dead transitions. [2024-06-27 17:54:19,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 263 transitions, 3412 flow [2024-06-27 17:54:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 17:54:19,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6103896103896104 [2024-06-27 17:54:19,851 INFO L175 Difference]: Start difference. First operand has 212 places, 241 transitions, 2815 flow. Second operand 7 states and 188 transitions. [2024-06-27 17:54:19,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 263 transitions, 3412 flow [2024-06-27 17:54:21,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 263 transitions, 3159 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:21,220 INFO L231 Difference]: Finished difference. Result has 215 places, 243 transitions, 2828 flow [2024-06-27 17:54:21,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2828, PETRI_PLACES=215, PETRI_TRANSITIONS=243} [2024-06-27 17:54:21,220 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 167 predicate places. [2024-06-27 17:54:21,221 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 243 transitions, 2828 flow [2024-06-27 17:54:21,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:21,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:21,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:21,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 17:54:21,221 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:21,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1241578187, now seen corresponding path program 6 times [2024-06-27 17:54:21,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:21,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006170275] [2024-06-27 17:54:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:21,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:21,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:21,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006170275] [2024-06-27 17:54:21,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006170275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:21,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:21,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:21,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851300241] [2024-06-27 17:54:21,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:21,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:21,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:21,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:21,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:21,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:54:21,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 243 transitions, 2828 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:21,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:21,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:54:21,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:23,453 INFO L124 PetriNetUnfolderBase]: 8676/14888 cut-off events. [2024-06-27 17:54:23,454 INFO L125 PetriNetUnfolderBase]: For 509848/509885 co-relation queries the response was YES. [2024-06-27 17:54:23,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70878 conditions, 14888 events. 8676/14888 cut-off events. For 509848/509885 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 129207 event pairs, 4436 based on Foata normal form. 15/14423 useless extension candidates. Maximal degree in co-relation 70778. Up to 7650 conditions per place. [2024-06-27 17:54:23,606 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 141 selfloop transitions, 129 changer transitions 0/284 dead transitions. [2024-06-27 17:54:23,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 284 transitions, 3783 flow [2024-06-27 17:54:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 17:54:23,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6688311688311688 [2024-06-27 17:54:23,608 INFO L175 Difference]: Start difference. First operand has 215 places, 243 transitions, 2828 flow. Second operand 7 states and 206 transitions. [2024-06-27 17:54:23,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 284 transitions, 3783 flow [2024-06-27 17:54:24,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 284 transitions, 3552 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:24,905 INFO L231 Difference]: Finished difference. Result has 217 places, 245 transitions, 2903 flow [2024-06-27 17:54:24,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2903, PETRI_PLACES=217, PETRI_TRANSITIONS=245} [2024-06-27 17:54:24,906 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 169 predicate places. [2024-06-27 17:54:24,906 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 245 transitions, 2903 flow [2024-06-27 17:54:24,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:24,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:24,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:24,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 17:54:24,907 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:24,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:24,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1345078407, now seen corresponding path program 7 times [2024-06-27 17:54:24,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:24,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703246892] [2024-06-27 17:54:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:24,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:24,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:24,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703246892] [2024-06-27 17:54:24,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703246892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:24,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:24,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:24,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329097754] [2024-06-27 17:54:24,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:24,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:24,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:24,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:24,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:25,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:54:25,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 245 transitions, 2903 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:25,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:25,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:54:25,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:27,257 INFO L124 PetriNetUnfolderBase]: 8651/14847 cut-off events. [2024-06-27 17:54:27,257 INFO L125 PetriNetUnfolderBase]: For 524059/524096 co-relation queries the response was YES. [2024-06-27 17:54:27,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71235 conditions, 14847 events. 8651/14847 cut-off events. For 524059/524096 co-relation queries the response was YES. Maximal size of possible extension queue 1232. Compared 128939 event pairs, 4288 based on Foata normal form. 21/14384 useless extension candidates. Maximal degree in co-relation 71134. Up to 7636 conditions per place. [2024-06-27 17:54:27,365 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 149 selfloop transitions, 121 changer transitions 0/284 dead transitions. [2024-06-27 17:54:27,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 284 transitions, 3699 flow [2024-06-27 17:54:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 17:54:27,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6688311688311688 [2024-06-27 17:54:27,367 INFO L175 Difference]: Start difference. First operand has 217 places, 245 transitions, 2903 flow. Second operand 7 states and 206 transitions. [2024-06-27 17:54:27,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 284 transitions, 3699 flow [2024-06-27 17:54:28,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 284 transitions, 3378 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:28,427 INFO L231 Difference]: Finished difference. Result has 219 places, 245 transitions, 2830 flow [2024-06-27 17:54:28,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2830, PETRI_PLACES=219, PETRI_TRANSITIONS=245} [2024-06-27 17:54:28,428 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 171 predicate places. [2024-06-27 17:54:28,428 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 245 transitions, 2830 flow [2024-06-27 17:54:28,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:28,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:28,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:28,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 17:54:28,429 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:28,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:28,429 INFO L85 PathProgramCache]: Analyzing trace with hash -731897681, now seen corresponding path program 8 times [2024-06-27 17:54:28,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:28,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871556058] [2024-06-27 17:54:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:28,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:28,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:28,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871556058] [2024-06-27 17:54:28,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871556058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:28,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:28,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:28,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221523424] [2024-06-27 17:54:28,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:28,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:28,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:28,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:28,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:28,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:54:28,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 245 transitions, 2830 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:28,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:28,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:54:28,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:30,610 INFO L124 PetriNetUnfolderBase]: 8628/14804 cut-off events. [2024-06-27 17:54:30,611 INFO L125 PetriNetUnfolderBase]: For 518310/518347 co-relation queries the response was YES. [2024-06-27 17:54:30,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69804 conditions, 14804 events. 8628/14804 cut-off events. For 518310/518347 co-relation queries the response was YES. Maximal size of possible extension queue 1229. Compared 128414 event pairs, 4846 based on Foata normal form. 23/14327 useless extension candidates. Maximal degree in co-relation 69703. Up to 13261 conditions per place. [2024-06-27 17:54:30,734 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 150 selfloop transitions, 101 changer transitions 0/265 dead transitions. [2024-06-27 17:54:30,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 265 transitions, 3392 flow [2024-06-27 17:54:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 17:54:30,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168831168831169 [2024-06-27 17:54:30,735 INFO L175 Difference]: Start difference. First operand has 219 places, 245 transitions, 2830 flow. Second operand 7 states and 190 transitions. [2024-06-27 17:54:30,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 265 transitions, 3392 flow [2024-06-27 17:54:31,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 265 transitions, 3130 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:31,588 INFO L231 Difference]: Finished difference. Result has 220 places, 245 transitions, 2776 flow [2024-06-27 17:54:31,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2568, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2776, PETRI_PLACES=220, PETRI_TRANSITIONS=245} [2024-06-27 17:54:31,589 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 172 predicate places. [2024-06-27 17:54:31,589 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 245 transitions, 2776 flow [2024-06-27 17:54:31,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:31,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:31,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:31,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 17:54:31,590 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:31,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:31,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1514435893, now seen corresponding path program 9 times [2024-06-27 17:54:31,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:31,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985072931] [2024-06-27 17:54:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:31,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:31,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985072931] [2024-06-27 17:54:31,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985072931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:31,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:31,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:31,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725059745] [2024-06-27 17:54:31,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:31,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:31,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:31,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:54:31,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 245 transitions, 2776 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:31,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:31,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:54:31,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand