./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe013_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/safe013_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe013_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:25:22,422 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:25:22,486 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:25:22,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:25:22,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:25:22,516 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:25:22,516 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:25:22,516 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:25:22,517 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:25:22,520 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:25:22,520 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:25:22,520 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:25:22,521 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:25:22,522 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:25:22,522 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:25:22,523 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:25:22,523 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:25:22,523 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:25:22,523 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:25:22,523 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:25:22,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:25:22,525 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:25:22,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:25:22,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:25:22,525 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:25:22,526 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:25:22,526 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:25:22,526 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:25:22,526 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:25:22,527 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:25:22,527 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:25:22,528 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:25:22,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:25:22,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:25:22,528 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:25:22,528 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:25:22,528 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:25:22,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:25:22,529 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:25:22,529 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:25:22,529 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:25:22,529 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:25:22,530 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:25:22,530 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:25:22,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:25:22,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:25:22,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:25:22,760 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:25:22,764 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:25:22,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe013_tso.yml/witness.yml [2024-06-27 19:25:22,877 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:25:22,877 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:25:22,877 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-06-27 19:25:23,840 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:25:24,029 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:25:24,044 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-06-27 19:25:24,059 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dd2539fb/bffc1be7cf654f88b1c17ef339a9ab28/FLAGa2006dee1 [2024-06-27 19:25:24,068 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dd2539fb/bffc1be7cf654f88b1c17ef339a9ab28 [2024-06-27 19:25:24,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:25:24,070 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:25:24,071 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:25:24,071 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:25:24,074 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:25:24,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:25:22" (1/2) ... [2024-06-27 19:25:24,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a53a044 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:25:24, skipping insertion in model container [2024-06-27 19:25:24,078 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:25:22" (1/2) ... [2024-06-27 19:25:24,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ef22a9c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:25:24, skipping insertion in model container [2024-06-27 19:25:24,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:25:24" (2/2) ... [2024-06-27 19:25:24,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a53a044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24, skipping insertion in model container [2024-06-27 19:25:24,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:25:24" (2/2) ... [2024-06-27 19:25:24,080 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:25:24,121 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:25:24,122 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 19:25:24,122 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 19:25:24,123 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 19:25:24,123 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:25:24,123 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 19:25:24,160 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:25:24,483 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:25:24,490 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:25:24,549 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:25:24,582 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:25:24,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24 WrapperNode [2024-06-27 19:25:24,583 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:25:24,584 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:25:24,584 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:25:24,584 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:25:24,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,611 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,641 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-27 19:25:24,641 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:25:24,642 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:25:24,643 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:25:24,643 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:25:24,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,657 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,672 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 19:25:24,677 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,678 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,682 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,689 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,690 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,694 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:25:24,702 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:25:24,702 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:25:24,703 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:25:24,703 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (1/1) ... [2024-06-27 19:25:24,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:25:24,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:25:24,727 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 19:25:24,734 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 19:25:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:25:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:25:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:25:24,758 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:25:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:25:24,759 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:25:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:25:24,759 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:25:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:25:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:25:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:25:24,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:25:24,761 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 19:25:24,878 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:25:24,880 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:25:25,011 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:25:25,011 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:25:25,075 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:25:25,084 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:25:25,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:25:25 BoogieIcfgContainer [2024-06-27 19:25:25,085 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:25:25,086 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:25:25,086 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:25:25,089 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:25:25,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:25:22" (1/4) ... [2024-06-27 19:25:25,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7d1de5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:25:25, skipping insertion in model container [2024-06-27 19:25:25,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:25:24" (2/4) ... [2024-06-27 19:25:25,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7d1de5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:25:25, skipping insertion in model container [2024-06-27 19:25:25,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:24" (3/4) ... [2024-06-27 19:25:25,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7d1de5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:25:25, skipping insertion in model container [2024-06-27 19:25:25,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:25:25" (4/4) ... [2024-06-27 19:25:25,091 INFO L112 eAbstractionObserver]: Analyzing ICFG safe013_tso.i [2024-06-27 19:25:25,106 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:25:25,106 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:25:25,106 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:25:25,141 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:25:25,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 19:25:25,205 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 19:25:25,206 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:25:25,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:25:25,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 19:25:25,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 19:25:25,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:25:25,227 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;@2759899b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:25:25,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:25:25,229 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:25:25,230 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:25:25,230 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:25:25,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:25,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:25:25,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:25,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:25,234 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-27 19:25:25,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:25,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836366047] [2024-06-27 19:25:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:25,505 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 19:25:25,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:25,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836366047] [2024-06-27 19:25:25,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836366047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:25,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:25,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:25:25,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433827395] [2024-06-27 19:25:25,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:25,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:25:25,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:25,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:25:25,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:25:25,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 19:25:25,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 19:25:25,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:25,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 19:25:25,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:25,693 INFO L124 PetriNetUnfolderBase]: 603/1012 cut-off events. [2024-06-27 19:25:25,694 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 19:25:25,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2004 conditions, 1012 events. 603/1012 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5140 event pairs, 376 based on Foata normal form. 1/949 useless extension candidates. Maximal degree in co-relation 1992. Up to 929 conditions per place. [2024-06-27 19:25:25,706 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 28 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 19:25:25,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 163 flow [2024-06-27 19:25:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:25:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:25:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-27 19:25:25,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2024-06-27 19:25:25,717 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 86 transitions. [2024-06-27 19:25:25,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 163 flow [2024-06-27 19:25:25,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:25,721 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 19:25:25,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 19:25:25,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 19:25:25,726 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 19:25:25,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 19:25:25,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:25,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:25,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:25:25,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:25,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:25,728 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-27 19:25:25,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:25,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105351643] [2024-06-27 19:25:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:25,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:25,863 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 19:25:25,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:25,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105351643] [2024-06-27 19:25:25,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105351643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:25,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:25,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:25:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281414920] [2024-06-27 19:25:25,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:25,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:25:25,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:25,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:25:25,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:25:25,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 19:25:25,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:25,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:25,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 19:25:25,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:26,054 INFO L124 PetriNetUnfolderBase]: 604/1021 cut-off events. [2024-06-27 19:25:26,054 INFO L125 PetriNetUnfolderBase]: For 205/213 co-relation queries the response was YES. [2024-06-27 19:25:26,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2329 conditions, 1021 events. 604/1021 cut-off events. For 205/213 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5196 event pairs, 320 based on Foata normal form. 7/994 useless extension candidates. Maximal degree in co-relation 2317. Up to 903 conditions per place. [2024-06-27 19:25:26,061 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 37 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2024-06-27 19:25:26,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 260 flow [2024-06-27 19:25:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:25:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:25:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-27 19:25:26,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134146341463414 [2024-06-27 19:25:26,065 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 117 transitions. [2024-06-27 19:25:26,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 260 flow [2024-06-27 19:25:26,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:25:26,068 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-27 19:25:26,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-27 19:25:26,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-27 19:25:26,069 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-27 19:25:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:26,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:26,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:26,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:25:26,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:26,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:26,072 INFO L85 PathProgramCache]: Analyzing trace with hash 627187612, now seen corresponding path program 1 times [2024-06-27 19:25:26,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:26,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283627265] [2024-06-27 19:25:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:26,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:26,168 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 19:25:26,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:26,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283627265] [2024-06-27 19:25:26,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283627265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:26,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:26,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:25:26,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862999884] [2024-06-27 19:25:26,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:26,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:25:26,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:26,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:25:26,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:25:26,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:26,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:26,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:26,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:26,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:26,304 INFO L124 PetriNetUnfolderBase]: 773/1281 cut-off events. [2024-06-27 19:25:26,304 INFO L125 PetriNetUnfolderBase]: For 881/898 co-relation queries the response was YES. [2024-06-27 19:25:26,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3475 conditions, 1281 events. 773/1281 cut-off events. For 881/898 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6366 event pairs, 428 based on Foata normal form. 8/1287 useless extension candidates. Maximal degree in co-relation 3460. Up to 1172 conditions per place. [2024-06-27 19:25:26,311 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-27 19:25:26,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 310 flow [2024-06-27 19:25:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:25:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:25:26,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-27 19:25:26,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:25:26,315 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 4 states and 106 transitions. [2024-06-27 19:25:26,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 310 flow [2024-06-27 19:25:26,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 306 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:25:26,319 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 210 flow [2024-06-27 19:25:26,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2024-06-27 19:25:26,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-27 19:25:26,320 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 210 flow [2024-06-27 19:25:26,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:26,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:26,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:26,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:25:26,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:26,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:26,322 INFO L85 PathProgramCache]: Analyzing trace with hash 816716713, now seen corresponding path program 1 times [2024-06-27 19:25:26,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:26,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274239238] [2024-06-27 19:25:26,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:26,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:26,485 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 19:25:26,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:26,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274239238] [2024-06-27 19:25:26,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274239238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:26,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:26,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:26,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463657651] [2024-06-27 19:25:26,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:26,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:26,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:26,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:26,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:26,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:26,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:26,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:26,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:26,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:26,709 INFO L124 PetriNetUnfolderBase]: 802/1335 cut-off events. [2024-06-27 19:25:26,709 INFO L125 PetriNetUnfolderBase]: For 1490/1512 co-relation queries the response was YES. [2024-06-27 19:25:26,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3944 conditions, 1335 events. 802/1335 cut-off events. For 1490/1512 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6698 event pairs, 229 based on Foata normal form. 23/1353 useless extension candidates. Maximal degree in co-relation 3926. Up to 1101 conditions per place. [2024-06-27 19:25:26,716 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2024-06-27 19:25:26,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 468 flow [2024-06-27 19:25:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-27 19:25:26,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2024-06-27 19:25:26,718 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 210 flow. Second operand 6 states and 167 transitions. [2024-06-27 19:25:26,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 468 flow [2024-06-27 19:25:26,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 82 transitions, 450 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:26,724 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 272 flow [2024-06-27 19:25:26,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-27 19:25:26,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-27 19:25:26,725 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 272 flow [2024-06-27 19:25:26,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:26,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:26,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:26,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:25:26,726 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:26,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:26,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2032019753, now seen corresponding path program 1 times [2024-06-27 19:25:26,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:26,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341614136] [2024-06-27 19:25:26,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:26,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:26,799 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 19:25:26,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:26,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341614136] [2024-06-27 19:25:26,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341614136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:26,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:26,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:26,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641050635] [2024-06-27 19:25:26,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:26,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:26,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:26,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:26,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:26,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 19:25:26,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:26,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:26,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:26,979 INFO L124 PetriNetUnfolderBase]: 950/1575 cut-off events. [2024-06-27 19:25:26,980 INFO L125 PetriNetUnfolderBase]: For 2550/2550 co-relation queries the response was YES. [2024-06-27 19:25:26,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5016 conditions, 1575 events. 950/1575 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8084 event pairs, 374 based on Foata normal form. 2/1575 useless extension candidates. Maximal degree in co-relation 4996. Up to 1425 conditions per place. [2024-06-27 19:25:26,989 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 57 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-27 19:25:26,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 490 flow [2024-06-27 19:25:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 19:25:26,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-27 19:25:26,991 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 272 flow. Second operand 5 states and 124 transitions. [2024-06-27 19:25:26,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 490 flow [2024-06-27 19:25:26,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 450 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:26,994 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 328 flow [2024-06-27 19:25:26,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=328, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2024-06-27 19:25:26,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-27 19:25:26,995 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 328 flow [2024-06-27 19:25:26,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 19:25:26,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:26,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:26,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:25:26,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:26,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:26,996 INFO L85 PathProgramCache]: Analyzing trace with hash 25667815, now seen corresponding path program 1 times [2024-06-27 19:25:26,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:26,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679394114] [2024-06-27 19:25:26,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:26,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:27,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:27,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679394114] [2024-06-27 19:25:27,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679394114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:27,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:27,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:27,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821878580] [2024-06-27 19:25:27,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:27,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:27,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:27,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:27,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:27,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:27,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:27,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:27,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:27,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:27,244 INFO L124 PetriNetUnfolderBase]: 918/1519 cut-off events. [2024-06-27 19:25:27,245 INFO L125 PetriNetUnfolderBase]: For 3396/3428 co-relation queries the response was YES. [2024-06-27 19:25:27,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5232 conditions, 1519 events. 918/1519 cut-off events. For 3396/3428 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7767 event pairs, 311 based on Foata normal form. 15/1517 useless extension candidates. Maximal degree in co-relation 5209. Up to 1303 conditions per place. [2024-06-27 19:25:27,254 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 25 changer transitions 0/95 dead transitions. [2024-06-27 19:25:27,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 654 flow [2024-06-27 19:25:27,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:27,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-27 19:25:27,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-27 19:25:27,255 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 328 flow. Second operand 5 states and 140 transitions. [2024-06-27 19:25:27,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 654 flow [2024-06-27 19:25:27,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 95 transitions, 648 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 19:25:27,260 INFO L231 Difference]: Finished difference. Result has 64 places, 73 transitions, 480 flow [2024-06-27 19:25:27,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=64, PETRI_TRANSITIONS=73} [2024-06-27 19:25:27,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-27 19:25:27,261 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 73 transitions, 480 flow [2024-06-27 19:25:27,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:27,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:27,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:27,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:25:27,261 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:27,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2119657435, now seen corresponding path program 2 times [2024-06-27 19:25:27,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083557657] [2024-06-27 19:25:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:27,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:27,330 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 19:25:27,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:27,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083557657] [2024-06-27 19:25:27,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083557657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:27,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:27,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:27,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870812342] [2024-06-27 19:25:27,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:27,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:27,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:27,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:27,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:27,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 73 transitions, 480 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:27,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:27,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:27,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:27,490 INFO L124 PetriNetUnfolderBase]: 932/1541 cut-off events. [2024-06-27 19:25:27,490 INFO L125 PetriNetUnfolderBase]: For 4997/5025 co-relation queries the response was YES. [2024-06-27 19:25:27,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6001 conditions, 1541 events. 932/1541 cut-off events. For 4997/5025 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7972 event pairs, 311 based on Foata normal form. 15/1542 useless extension candidates. Maximal degree in co-relation 5974. Up to 1328 conditions per place. [2024-06-27 19:25:27,501 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 56 selfloop transitions, 24 changer transitions 0/92 dead transitions. [2024-06-27 19:25:27,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 720 flow [2024-06-27 19:25:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-27 19:25:27,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:25:27,502 INFO L175 Difference]: Start difference. First operand has 64 places, 73 transitions, 480 flow. Second operand 5 states and 135 transitions. [2024-06-27 19:25:27,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 720 flow [2024-06-27 19:25:27,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 692 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-27 19:25:27,509 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 536 flow [2024-06-27 19:25:27,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-27 19:25:27,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-27 19:25:27,510 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 536 flow [2024-06-27 19:25:27,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:27,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:27,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:27,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:25:27,511 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:27,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:27,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1882737432, now seen corresponding path program 1 times [2024-06-27 19:25:27,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:27,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485171936] [2024-06-27 19:25:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:27,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:27,593 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 19:25:27,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:27,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485171936] [2024-06-27 19:25:27,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485171936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:27,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:27,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:27,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820214430] [2024-06-27 19:25:27,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:27,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:27,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:27,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:27,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:27,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 536 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:27,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:27,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:27,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:27,787 INFO L124 PetriNetUnfolderBase]: 983/1631 cut-off events. [2024-06-27 19:25:27,787 INFO L125 PetriNetUnfolderBase]: For 5759/5762 co-relation queries the response was YES. [2024-06-27 19:25:27,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 1631 events. 983/1631 cut-off events. For 5759/5762 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8404 event pairs, 347 based on Foata normal form. 2/1629 useless extension candidates. Maximal degree in co-relation 6258. Up to 1415 conditions per place. [2024-06-27 19:25:27,796 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 84 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-27 19:25:27,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 112 transitions, 912 flow [2024-06-27 19:25:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:25:27,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-27 19:25:27,797 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 536 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:25:27,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 112 transitions, 912 flow [2024-06-27 19:25:27,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 112 transitions, 852 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:27,805 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 628 flow [2024-06-27 19:25:27,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=628, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2024-06-27 19:25:27,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-27 19:25:27,806 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 628 flow [2024-06-27 19:25:27,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:27,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:27,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:27,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:25:27,806 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:27,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:27,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1269945300, now seen corresponding path program 2 times [2024-06-27 19:25:27,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:27,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853879267] [2024-06-27 19:25:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:27,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:27,889 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 19:25:27,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:27,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853879267] [2024-06-27 19:25:27,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853879267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:27,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:27,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:27,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272630858] [2024-06-27 19:25:27,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:27,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:27,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:27,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:27,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:27,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:27,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 628 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:27,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:27,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:27,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:28,062 INFO L124 PetriNetUnfolderBase]: 994/1647 cut-off events. [2024-06-27 19:25:28,063 INFO L125 PetriNetUnfolderBase]: For 6980/6980 co-relation queries the response was YES. [2024-06-27 19:25:28,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6698 conditions, 1647 events. 994/1647 cut-off events. For 6980/6980 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8479 event pairs, 346 based on Foata normal form. 2/1644 useless extension candidates. Maximal degree in co-relation 6664. Up to 1427 conditions per place. [2024-06-27 19:25:28,074 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 26 changer transitions 0/114 dead transitions. [2024-06-27 19:25:28,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 964 flow [2024-06-27 19:25:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:25:28,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-27 19:25:28,075 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 628 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:25:28,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 964 flow [2024-06-27 19:25:28,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 930 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:28,092 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 706 flow [2024-06-27 19:25:28,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=706, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2024-06-27 19:25:28,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-27 19:25:28,093 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 706 flow [2024-06-27 19:25:28,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:28,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:28,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:28,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:25:28,093 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:28,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:28,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1438885400, now seen corresponding path program 3 times [2024-06-27 19:25:28,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:28,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470055081] [2024-06-27 19:25:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:28,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:28,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:28,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470055081] [2024-06-27 19:25:28,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470055081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:28,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:28,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:28,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384847628] [2024-06-27 19:25:28,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:28,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:28,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:28,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:28,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:28,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 706 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:28,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:28,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:28,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:28,352 INFO L124 PetriNetUnfolderBase]: 989/1640 cut-off events. [2024-06-27 19:25:28,352 INFO L125 PetriNetUnfolderBase]: For 8010/8010 co-relation queries the response was YES. [2024-06-27 19:25:28,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 1640 events. 989/1640 cut-off events. For 8010/8010 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8423 event pairs, 346 based on Foata normal form. 2/1637 useless extension candidates. Maximal degree in co-relation 6788. Up to 1422 conditions per place. [2024-06-27 19:25:28,363 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 79 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-06-27 19:25:28,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 112 transitions, 962 flow [2024-06-27 19:25:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:25:28,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:25:28,364 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 706 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:25:28,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 112 transitions, 962 flow [2024-06-27 19:25:28,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 934 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 19:25:28,374 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 736 flow [2024-06-27 19:25:28,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=736, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2024-06-27 19:25:28,375 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-27 19:25:28,375 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 736 flow [2024-06-27 19:25:28,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:28,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:28,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:28,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:25:28,376 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:28,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:28,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1439162230, now seen corresponding path program 1 times [2024-06-27 19:25:28,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:28,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498061120] [2024-06-27 19:25:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:28,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:28,463 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 19:25:28,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:28,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498061120] [2024-06-27 19:25:28,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498061120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:28,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:28,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:28,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375491352] [2024-06-27 19:25:28,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:28,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:28,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:28,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:28,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:28,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:28,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 736 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:28,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:28,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:28,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:28,687 INFO L124 PetriNetUnfolderBase]: 981/1633 cut-off events. [2024-06-27 19:25:28,687 INFO L125 PetriNetUnfolderBase]: For 9255/9255 co-relation queries the response was YES. [2024-06-27 19:25:28,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6887 conditions, 1633 events. 981/1633 cut-off events. For 9255/9255 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8411 event pairs, 323 based on Foata normal form. 4/1635 useless extension candidates. Maximal degree in co-relation 6849. Up to 1452 conditions per place. [2024-06-27 19:25:28,698 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 95 selfloop transitions, 12 changer transitions 0/115 dead transitions. [2024-06-27 19:25:28,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 1016 flow [2024-06-27 19:25:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:28,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:25:28,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-27 19:25:28,699 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 736 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:25:28,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 1016 flow [2024-06-27 19:25:28,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 115 transitions, 966 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:28,711 INFO L231 Difference]: Finished difference. Result has 87 places, 95 transitions, 737 flow [2024-06-27 19:25:28,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=737, PETRI_PLACES=87, PETRI_TRANSITIONS=95} [2024-06-27 19:25:28,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-27 19:25:28,712 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 95 transitions, 737 flow [2024-06-27 19:25:28,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:28,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:28,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:28,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:25:28,712 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:28,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:28,713 INFO L85 PathProgramCache]: Analyzing trace with hash -460282662, now seen corresponding path program 1 times [2024-06-27 19:25:28,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:28,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462690993] [2024-06-27 19:25:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:28,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:28,803 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 19:25:28,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:28,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462690993] [2024-06-27 19:25:28,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462690993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:28,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:28,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:28,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328758701] [2024-06-27 19:25:28,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:28,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:28,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:28,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:28,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 95 transitions, 737 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:28,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:28,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:28,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:29,034 INFO L124 PetriNetUnfolderBase]: 954/1592 cut-off events. [2024-06-27 19:25:29,035 INFO L125 PetriNetUnfolderBase]: For 11527/11550 co-relation queries the response was YES. [2024-06-27 19:25:29,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7072 conditions, 1592 events. 954/1592 cut-off events. For 11527/11550 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8279 event pairs, 280 based on Foata normal form. 18/1563 useless extension candidates. Maximal degree in co-relation 7033. Up to 1343 conditions per place. [2024-06-27 19:25:29,044 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 81 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-27 19:25:29,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 125 transitions, 1065 flow [2024-06-27 19:25:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-27 19:25:29,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 19:25:29,045 INFO L175 Difference]: Start difference. First operand has 87 places, 95 transitions, 737 flow. Second operand 6 states and 164 transitions. [2024-06-27 19:25:29,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 125 transitions, 1065 flow [2024-06-27 19:25:29,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 125 transitions, 1032 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:29,057 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 799 flow [2024-06-27 19:25:29,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=799, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2024-06-27 19:25:29,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-27 19:25:29,059 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 799 flow [2024-06-27 19:25:29,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:29,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:29,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:29,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:25:29,060 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:29,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:29,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1103016314, now seen corresponding path program 2 times [2024-06-27 19:25:29,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:29,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335341647] [2024-06-27 19:25:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:29,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:29,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:29,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335341647] [2024-06-27 19:25:29,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335341647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:29,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:29,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:29,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39005727] [2024-06-27 19:25:29,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:29,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:29,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:29,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:29,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:29,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:29,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 799 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:29,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:29,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:29,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:29,325 INFO L124 PetriNetUnfolderBase]: 982/1644 cut-off events. [2024-06-27 19:25:29,325 INFO L125 PetriNetUnfolderBase]: For 13780/13816 co-relation queries the response was YES. [2024-06-27 19:25:29,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7717 conditions, 1644 events. 982/1644 cut-off events. For 13780/13816 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8662 event pairs, 281 based on Foata normal form. 25/1616 useless extension candidates. Maximal degree in co-relation 7677. Up to 1275 conditions per place. [2024-06-27 19:25:29,336 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 47 changer transitions 0/135 dead transitions. [2024-06-27 19:25:29,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 1259 flow [2024-06-27 19:25:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-27 19:25:29,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2024-06-27 19:25:29,338 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 799 flow. Second operand 6 states and 167 transitions. [2024-06-27 19:25:29,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 1259 flow [2024-06-27 19:25:29,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 135 transitions, 1194 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:29,353 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 940 flow [2024-06-27 19:25:29,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=940, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2024-06-27 19:25:29,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-27 19:25:29,354 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 940 flow [2024-06-27 19:25:29,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:29,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:29,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:29,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:25:29,355 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:29,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:29,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1176313978, now seen corresponding path program 3 times [2024-06-27 19:25:29,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:29,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753101696] [2024-06-27 19:25:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:29,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:29,457 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 19:25:29,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:29,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753101696] [2024-06-27 19:25:29,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753101696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:29,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:29,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:29,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819473713] [2024-06-27 19:25:29,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:29,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:29,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:29,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:29,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:29,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:29,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 940 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:29,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:29,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:29,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:29,651 INFO L124 PetriNetUnfolderBase]: 985/1644 cut-off events. [2024-06-27 19:25:29,651 INFO L125 PetriNetUnfolderBase]: For 16035/16067 co-relation queries the response was YES. [2024-06-27 19:25:29,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8184 conditions, 1644 events. 985/1644 cut-off events. For 16035/16067 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8730 event pairs, 294 based on Foata normal form. 19/1607 useless extension candidates. Maximal degree in co-relation 8143. Up to 1283 conditions per place. [2024-06-27 19:25:29,662 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 43 changer transitions 0/131 dead transitions. [2024-06-27 19:25:29,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 131 transitions, 1268 flow [2024-06-27 19:25:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 19:25:29,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6544715447154471 [2024-06-27 19:25:29,664 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 940 flow. Second operand 6 states and 161 transitions. [2024-06-27 19:25:29,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 131 transitions, 1268 flow [2024-06-27 19:25:29,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 131 transitions, 1211 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 19:25:29,682 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 979 flow [2024-06-27 19:25:29,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=979, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-06-27 19:25:29,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-27 19:25:29,683 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 979 flow [2024-06-27 19:25:29,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:29,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:29,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:29,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:25:29,684 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:29,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1698585732, now seen corresponding path program 1 times [2024-06-27 19:25:29,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:29,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102894122] [2024-06-27 19:25:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:29,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:29,754 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 19:25:29,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102894122] [2024-06-27 19:25:29,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102894122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:29,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:29,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:29,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633368003] [2024-06-27 19:25:29,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:29,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:29,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:29,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:29,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 979 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 19:25:29,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:29,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:29,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:29,917 INFO L124 PetriNetUnfolderBase]: 942/1582 cut-off events. [2024-06-27 19:25:29,917 INFO L125 PetriNetUnfolderBase]: For 15408/15413 co-relation queries the response was YES. [2024-06-27 19:25:29,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7831 conditions, 1582 events. 942/1582 cut-off events. For 15408/15413 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8330 event pairs, 288 based on Foata normal form. 7/1580 useless extension candidates. Maximal degree in co-relation 7787. Up to 1339 conditions per place. [2024-06-27 19:25:29,926 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 81 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-06-27 19:25:29,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 119 transitions, 1203 flow [2024-06-27 19:25:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:25:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:25:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-27 19:25:29,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-27 19:25:29,928 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 979 flow. Second operand 4 states and 105 transitions. [2024-06-27 19:25:29,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 119 transitions, 1203 flow [2024-06-27 19:25:29,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 119 transitions, 1113 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:29,944 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 936 flow [2024-06-27 19:25:29,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=936, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-06-27 19:25:29,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-27 19:25:29,945 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 936 flow [2024-06-27 19:25:29,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 19:25:29,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:29,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:29,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:25:29,946 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:29,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:29,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1123743863, now seen corresponding path program 1 times [2024-06-27 19:25:29,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:29,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11751629] [2024-06-27 19:25:29,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:29,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:30,047 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 19:25:30,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:30,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11751629] [2024-06-27 19:25:30,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11751629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:30,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:30,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:30,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208920203] [2024-06-27 19:25:30,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:30,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:30,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:30,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:30,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:30,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:30,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 936 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:30,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:30,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:30,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:30,254 INFO L124 PetriNetUnfolderBase]: 1008/1669 cut-off events. [2024-06-27 19:25:30,254 INFO L125 PetriNetUnfolderBase]: For 16463/16463 co-relation queries the response was YES. [2024-06-27 19:25:30,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8190 conditions, 1669 events. 1008/1669 cut-off events. For 16463/16463 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8538 event pairs, 301 based on Foata normal form. 2/1669 useless extension candidates. Maximal degree in co-relation 8145. Up to 1476 conditions per place. [2024-06-27 19:25:30,264 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 124 selfloop transitions, 16 changer transitions 0/148 dead transitions. [2024-06-27 19:25:30,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 148 transitions, 1354 flow [2024-06-27 19:25:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:25:30,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:25:30,265 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 936 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:25:30,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 148 transitions, 1354 flow [2024-06-27 19:25:30,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 148 transitions, 1304 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:30,283 INFO L231 Difference]: Finished difference. Result has 102 places, 119 transitions, 1012 flow [2024-06-27 19:25:30,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1012, PETRI_PLACES=102, PETRI_TRANSITIONS=119} [2024-06-27 19:25:30,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-27 19:25:30,284 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 119 transitions, 1012 flow [2024-06-27 19:25:30,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:30,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:30,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:30,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:25:30,284 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:30,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:30,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1236042889, now seen corresponding path program 2 times [2024-06-27 19:25:30,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:30,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970439395] [2024-06-27 19:25:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:30,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:30,364 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 19:25:30,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:30,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970439395] [2024-06-27 19:25:30,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970439395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:30,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:30,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:30,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188200617] [2024-06-27 19:25:30,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:30,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:30,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:30,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:30,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:30,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 119 transitions, 1012 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:30,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:30,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:30,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:30,575 INFO L124 PetriNetUnfolderBase]: 1035/1718 cut-off events. [2024-06-27 19:25:30,575 INFO L125 PetriNetUnfolderBase]: For 18944/18947 co-relation queries the response was YES. [2024-06-27 19:25:30,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8785 conditions, 1718 events. 1035/1718 cut-off events. For 18944/18947 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8866 event pairs, 303 based on Foata normal form. 2/1716 useless extension candidates. Maximal degree in co-relation 8738. Up to 1393 conditions per place. [2024-06-27 19:25:30,587 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 113 selfloop transitions, 42 changer transitions 0/163 dead transitions. [2024-06-27 19:25:30,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 163 transitions, 1628 flow [2024-06-27 19:25:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:30,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:30,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:25:30,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:25:30,588 INFO L175 Difference]: Start difference. First operand has 102 places, 119 transitions, 1012 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:25:30,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 163 transitions, 1628 flow [2024-06-27 19:25:30,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 163 transitions, 1582 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:30,609 INFO L231 Difference]: Finished difference. Result has 108 places, 132 transitions, 1200 flow [2024-06-27 19:25:30,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1200, PETRI_PLACES=108, PETRI_TRANSITIONS=132} [2024-06-27 19:25:30,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-27 19:25:30,609 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 132 transitions, 1200 flow [2024-06-27 19:25:30,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:30,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:30,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:30,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:25:30,610 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:30,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1236250279, now seen corresponding path program 3 times [2024-06-27 19:25:30,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:30,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131462899] [2024-06-27 19:25:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:30,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:30,695 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 19:25:30,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:30,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131462899] [2024-06-27 19:25:30,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131462899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:30,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:30,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:30,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219622147] [2024-06-27 19:25:30,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:30,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:30,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:30,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:30,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:30,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:30,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 132 transitions, 1200 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:30,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:30,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:30,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:30,897 INFO L124 PetriNetUnfolderBase]: 1030/1711 cut-off events. [2024-06-27 19:25:30,897 INFO L125 PetriNetUnfolderBase]: For 21300/21303 co-relation queries the response was YES. [2024-06-27 19:25:30,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9254 conditions, 1711 events. 1030/1711 cut-off events. For 21300/21303 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8808 event pairs, 303 based on Foata normal form. 2/1709 useless extension candidates. Maximal degree in co-relation 9204. Up to 1388 conditions per place. [2024-06-27 19:25:30,908 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 112 selfloop transitions, 41 changer transitions 0/161 dead transitions. [2024-06-27 19:25:30,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 161 transitions, 1647 flow [2024-06-27 19:25:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:25:30,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:25:30,909 INFO L175 Difference]: Start difference. First operand has 108 places, 132 transitions, 1200 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:25:30,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 161 transitions, 1647 flow [2024-06-27 19:25:30,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 161 transitions, 1605 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 19:25:30,934 INFO L231 Difference]: Finished difference. Result has 114 places, 132 transitions, 1248 flow [2024-06-27 19:25:30,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1248, PETRI_PLACES=114, PETRI_TRANSITIONS=132} [2024-06-27 19:25:30,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-27 19:25:30,935 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 132 transitions, 1248 flow [2024-06-27 19:25:30,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:30,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:30,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:30,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:25:30,936 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:30,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:30,936 INFO L85 PathProgramCache]: Analyzing trace with hash 166448715, now seen corresponding path program 1 times [2024-06-27 19:25:30,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:30,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200478960] [2024-06-27 19:25:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:30,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:31,021 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 19:25:31,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:31,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200478960] [2024-06-27 19:25:31,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200478960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:31,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:31,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:31,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228532517] [2024-06-27 19:25:31,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:31,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:31,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:31,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:31,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:31,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:31,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 132 transitions, 1248 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:31,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:31,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:31,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:31,296 INFO L124 PetriNetUnfolderBase]: 1047/1738 cut-off events. [2024-06-27 19:25:31,296 INFO L125 PetriNetUnfolderBase]: For 23661/23664 co-relation queries the response was YES. [2024-06-27 19:25:31,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9533 conditions, 1738 events. 1047/1738 cut-off events. For 23661/23664 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8977 event pairs, 299 based on Foata normal form. 4/1738 useless extension candidates. Maximal degree in co-relation 9481. Up to 1487 conditions per place. [2024-06-27 19:25:31,308 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 126 selfloop transitions, 27 changer transitions 0/161 dead transitions. [2024-06-27 19:25:31,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 161 transitions, 1636 flow [2024-06-27 19:25:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:25:31,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:25:31,310 INFO L175 Difference]: Start difference. First operand has 114 places, 132 transitions, 1248 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:25:31,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 161 transitions, 1636 flow [2024-06-27 19:25:31,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 161 transitions, 1540 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:31,339 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 1231 flow [2024-06-27 19:25:31,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1231, PETRI_PLACES=116, PETRI_TRANSITIONS=134} [2024-06-27 19:25:31,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-27 19:25:31,340 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 1231 flow [2024-06-27 19:25:31,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:31,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:31,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:31,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:25:31,341 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:31,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash 390237973, now seen corresponding path program 4 times [2024-06-27 19:25:31,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:31,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258694545] [2024-06-27 19:25:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:31,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:31,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:31,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258694545] [2024-06-27 19:25:31,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258694545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:31,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:31,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:31,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481598092] [2024-06-27 19:25:31,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:31,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:31,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:31,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:31,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:31,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 1231 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:31,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:31,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:31,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:31,604 INFO L124 PetriNetUnfolderBase]: 1074/1777 cut-off events. [2024-06-27 19:25:31,604 INFO L125 PetriNetUnfolderBase]: For 25678/25678 co-relation queries the response was YES. [2024-06-27 19:25:31,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9966 conditions, 1777 events. 1074/1777 cut-off events. For 25678/25678 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9250 event pairs, 307 based on Foata normal form. 2/1771 useless extension candidates. Maximal degree in co-relation 9913. Up to 1444 conditions per place. [2024-06-27 19:25:31,618 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 113 selfloop transitions, 47 changer transitions 0/168 dead transitions. [2024-06-27 19:25:31,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 168 transitions, 1840 flow [2024-06-27 19:25:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:25:31,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-27 19:25:31,620 INFO L175 Difference]: Start difference. First operand has 116 places, 134 transitions, 1231 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:25:31,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 168 transitions, 1840 flow [2024-06-27 19:25:31,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 1779 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:31,648 INFO L231 Difference]: Finished difference. Result has 119 places, 141 transitions, 1360 flow [2024-06-27 19:25:31,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1360, PETRI_PLACES=119, PETRI_TRANSITIONS=141} [2024-06-27 19:25:31,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-27 19:25:31,649 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 141 transitions, 1360 flow [2024-06-27 19:25:31,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:31,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:31,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:31,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:25:31,650 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:31,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:31,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1225809913, now seen corresponding path program 5 times [2024-06-27 19:25:31,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:31,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684879224] [2024-06-27 19:25:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:31,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:31,723 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 19:25:31,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:31,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684879224] [2024-06-27 19:25:31,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684879224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:31,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:31,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:31,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146029003] [2024-06-27 19:25:31,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:31,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:31,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:31,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:31,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:31,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:31,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 141 transitions, 1360 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:31,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:31,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:31,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:31,928 INFO L124 PetriNetUnfolderBase]: 1069/1770 cut-off events. [2024-06-27 19:25:31,929 INFO L125 PetriNetUnfolderBase]: For 27722/27722 co-relation queries the response was YES. [2024-06-27 19:25:31,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10106 conditions, 1770 events. 1069/1770 cut-off events. For 27722/27722 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9170 event pairs, 307 based on Foata normal form. 2/1764 useless extension candidates. Maximal degree in co-relation 10051. Up to 1439 conditions per place. [2024-06-27 19:25:31,941 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 108 selfloop transitions, 51 changer transitions 0/167 dead transitions. [2024-06-27 19:25:31,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 1832 flow [2024-06-27 19:25:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:25:31,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:25:31,943 INFO L175 Difference]: Start difference. First operand has 119 places, 141 transitions, 1360 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:25:31,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 1832 flow [2024-06-27 19:25:31,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 167 transitions, 1680 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:31,980 INFO L231 Difference]: Finished difference. Result has 121 places, 142 transitions, 1332 flow [2024-06-27 19:25:31,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1332, PETRI_PLACES=121, PETRI_TRANSITIONS=142} [2024-06-27 19:25:31,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-27 19:25:31,980 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 142 transitions, 1332 flow [2024-06-27 19:25:31,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:31,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:31,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:31,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:25:31,981 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:31,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:31,981 INFO L85 PathProgramCache]: Analyzing trace with hash -210790055, now seen corresponding path program 6 times [2024-06-27 19:25:31,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:31,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277219015] [2024-06-27 19:25:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:31,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:32,055 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 19:25:32,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:32,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277219015] [2024-06-27 19:25:32,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277219015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:32,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:32,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:32,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284357942] [2024-06-27 19:25:32,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:32,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:32,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:32,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:32,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:32,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:32,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 142 transitions, 1332 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:32,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:32,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:32,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:32,281 INFO L124 PetriNetUnfolderBase]: 1064/1763 cut-off events. [2024-06-27 19:25:32,281 INFO L125 PetriNetUnfolderBase]: For 29136/29136 co-relation queries the response was YES. [2024-06-27 19:25:32,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10039 conditions, 1763 events. 1064/1763 cut-off events. For 29136/29136 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9146 event pairs, 307 based on Foata normal form. 2/1757 useless extension candidates. Maximal degree in co-relation 9984. Up to 1434 conditions per place. [2024-06-27 19:25:32,293 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 108 selfloop transitions, 49 changer transitions 0/165 dead transitions. [2024-06-27 19:25:32,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 165 transitions, 1704 flow [2024-06-27 19:25:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:25:32,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:25:32,294 INFO L175 Difference]: Start difference. First operand has 121 places, 142 transitions, 1332 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:25:32,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 165 transitions, 1704 flow [2024-06-27 19:25:32,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 165 transitions, 1608 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:32,324 INFO L231 Difference]: Finished difference. Result has 124 places, 142 transitions, 1342 flow [2024-06-27 19:25:32,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1342, PETRI_PLACES=124, PETRI_TRANSITIONS=142} [2024-06-27 19:25:32,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-27 19:25:32,325 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 142 transitions, 1342 flow [2024-06-27 19:25:32,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:32,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:32,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:32,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:25:32,326 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:32,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash 482416039, now seen corresponding path program 2 times [2024-06-27 19:25:32,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:32,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75592062] [2024-06-27 19:25:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:32,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:32,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:32,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75592062] [2024-06-27 19:25:32,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75592062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:32,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:32,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:32,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483721304] [2024-06-27 19:25:32,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:32,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:32,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:32,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:32,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:32,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:32,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 142 transitions, 1342 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:32,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:32,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:32,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:32,668 INFO L124 PetriNetUnfolderBase]: 1081/1795 cut-off events. [2024-06-27 19:25:32,668 INFO L125 PetriNetUnfolderBase]: For 32063/32063 co-relation queries the response was YES. [2024-06-27 19:25:32,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10250 conditions, 1795 events. 1081/1795 cut-off events. For 32063/32063 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9340 event pairs, 300 based on Foata normal form. 4/1794 useless extension candidates. Maximal degree in co-relation 10194. Up to 1539 conditions per place. [2024-06-27 19:25:32,682 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 133 selfloop transitions, 27 changer transitions 0/168 dead transitions. [2024-06-27 19:25:32,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 168 transitions, 1740 flow [2024-06-27 19:25:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:25:32,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:25:32,684 INFO L175 Difference]: Start difference. First operand has 124 places, 142 transitions, 1342 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:25:32,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 168 transitions, 1740 flow [2024-06-27 19:25:32,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 168 transitions, 1644 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:32,727 INFO L231 Difference]: Finished difference. Result has 126 places, 144 transitions, 1329 flow [2024-06-27 19:25:32,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1329, PETRI_PLACES=126, PETRI_TRANSITIONS=144} [2024-06-27 19:25:32,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-27 19:25:32,728 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 144 transitions, 1329 flow [2024-06-27 19:25:32,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:32,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:32,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:32,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:25:32,729 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:32,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash 738916549, now seen corresponding path program 3 times [2024-06-27 19:25:32,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:32,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204339512] [2024-06-27 19:25:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:32,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:32,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204339512] [2024-06-27 19:25:32,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204339512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:32,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271561920] [2024-06-27 19:25:32,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:32,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:32,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:32,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:32,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 144 transitions, 1329 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:32,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:32,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:32,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:33,058 INFO L124 PetriNetUnfolderBase]: 1098/1827 cut-off events. [2024-06-27 19:25:33,059 INFO L125 PetriNetUnfolderBase]: For 34674/34674 co-relation queries the response was YES. [2024-06-27 19:25:33,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10528 conditions, 1827 events. 1098/1827 cut-off events. For 34674/34674 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9560 event pairs, 305 based on Foata normal form. 4/1826 useless extension candidates. Maximal degree in co-relation 10471. Up to 1566 conditions per place. [2024-06-27 19:25:33,073 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 134 selfloop transitions, 28 changer transitions 0/170 dead transitions. [2024-06-27 19:25:33,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 170 transitions, 1735 flow [2024-06-27 19:25:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:25:33,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:25:33,075 INFO L175 Difference]: Start difference. First operand has 126 places, 144 transitions, 1329 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:25:33,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 170 transitions, 1735 flow [2024-06-27 19:25:33,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 170 transitions, 1670 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:33,114 INFO L231 Difference]: Finished difference. Result has 128 places, 146 transitions, 1353 flow [2024-06-27 19:25:33,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1353, PETRI_PLACES=128, PETRI_TRANSITIONS=146} [2024-06-27 19:25:33,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-27 19:25:33,116 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 146 transitions, 1353 flow [2024-06-27 19:25:33,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:33,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:33,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:33,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:25:33,116 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:33,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:33,117 INFO L85 PathProgramCache]: Analyzing trace with hash 55448981, now seen corresponding path program 4 times [2024-06-27 19:25:33,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:33,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684398814] [2024-06-27 19:25:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:33,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:33,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:33,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684398814] [2024-06-27 19:25:33,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684398814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:33,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:33,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:33,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520785148] [2024-06-27 19:25:33,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:33,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:33,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:33,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:33,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:33,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 146 transitions, 1353 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:33,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:33,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:33,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:33,429 INFO L124 PetriNetUnfolderBase]: 1090/1814 cut-off events. [2024-06-27 19:25:33,430 INFO L125 PetriNetUnfolderBase]: For 36952/36952 co-relation queries the response was YES. [2024-06-27 19:25:33,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10571 conditions, 1814 events. 1090/1814 cut-off events. For 36952/36952 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9521 event pairs, 274 based on Foata normal form. 4/1813 useless extension candidates. Maximal degree in co-relation 10513. Up to 1477 conditions per place. [2024-06-27 19:25:33,443 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 130 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-27 19:25:33,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 173 transitions, 1771 flow [2024-06-27 19:25:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:25:33,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:25:33,445 INFO L175 Difference]: Start difference. First operand has 128 places, 146 transitions, 1353 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:25:33,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 173 transitions, 1771 flow [2024-06-27 19:25:33,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 173 transitions, 1700 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:33,482 INFO L231 Difference]: Finished difference. Result has 130 places, 148 transitions, 1389 flow [2024-06-27 19:25:33,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1389, PETRI_PLACES=130, PETRI_TRANSITIONS=148} [2024-06-27 19:25:33,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-27 19:25:33,482 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 148 transitions, 1389 flow [2024-06-27 19:25:33,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:33,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:33,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:33,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:25:33,483 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:33,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:33,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1358205659, now seen corresponding path program 1 times [2024-06-27 19:25:33,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:33,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908802227] [2024-06-27 19:25:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:33,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:33,581 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 19:25:33,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:33,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908802227] [2024-06-27 19:25:33,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908802227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:33,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:33,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:33,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203970036] [2024-06-27 19:25:33,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:33,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:33,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:33,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:33,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 148 transitions, 1389 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:33,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:33,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:33,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:33,948 INFO L124 PetriNetUnfolderBase]: 1169/1956 cut-off events. [2024-06-27 19:25:33,949 INFO L125 PetriNetUnfolderBase]: For 50770/50810 co-relation queries the response was YES. [2024-06-27 19:25:33,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11898 conditions, 1956 events. 1169/1956 cut-off events. For 50770/50810 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10521 event pairs, 188 based on Foata normal form. 18/1922 useless extension candidates. Maximal degree in co-relation 11839. Up to 1444 conditions per place. [2024-06-27 19:25:33,963 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 127 selfloop transitions, 35 changer transitions 0/195 dead transitions. [2024-06-27 19:25:33,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 195 transitions, 2003 flow [2024-06-27 19:25:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 19:25:33,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-27 19:25:33,965 INFO L175 Difference]: Start difference. First operand has 130 places, 148 transitions, 1389 flow. Second operand 8 states and 218 transitions. [2024-06-27 19:25:33,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 195 transitions, 2003 flow [2024-06-27 19:25:34,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 195 transitions, 1914 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:34,008 INFO L231 Difference]: Finished difference. Result has 133 places, 152 transitions, 1433 flow [2024-06-27 19:25:34,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1433, PETRI_PLACES=133, PETRI_TRANSITIONS=152} [2024-06-27 19:25:34,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-27 19:25:34,009 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 152 transitions, 1433 flow [2024-06-27 19:25:34,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:34,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:34,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:34,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:25:34,010 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:34,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash 687561159, now seen corresponding path program 2 times [2024-06-27 19:25:34,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:34,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44981067] [2024-06-27 19:25:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:34,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:34,097 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 19:25:34,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44981067] [2024-06-27 19:25:34,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44981067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:34,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:34,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:34,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953099286] [2024-06-27 19:25:34,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:34,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:34,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:34,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:34,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:34,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:34,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 152 transitions, 1433 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:34,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:34,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:34,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:34,378 INFO L124 PetriNetUnfolderBase]: 1139/1910 cut-off events. [2024-06-27 19:25:34,379 INFO L125 PetriNetUnfolderBase]: For 50367/50406 co-relation queries the response was YES. [2024-06-27 19:25:34,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 1910 events. 1139/1910 cut-off events. For 50367/50406 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10293 event pairs, 263 based on Foata normal form. 16/1873 useless extension candidates. Maximal degree in co-relation 11552. Up to 1560 conditions per place. [2024-06-27 19:25:34,391 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 31 changer transitions 0/185 dead transitions. [2024-06-27 19:25:34,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 185 transitions, 1837 flow [2024-06-27 19:25:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:25:34,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:25:34,393 INFO L175 Difference]: Start difference. First operand has 133 places, 152 transitions, 1433 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:25:34,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 185 transitions, 1837 flow [2024-06-27 19:25:34,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 185 transitions, 1781 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:34,436 INFO L231 Difference]: Finished difference. Result has 136 places, 152 transitions, 1448 flow [2024-06-27 19:25:34,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1448, PETRI_PLACES=136, PETRI_TRANSITIONS=152} [2024-06-27 19:25:34,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-27 19:25:34,437 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 152 transitions, 1448 flow [2024-06-27 19:25:34,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:34,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:34,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:34,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:25:34,437 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:34,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash 330942841, now seen corresponding path program 3 times [2024-06-27 19:25:34,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:34,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247952437] [2024-06-27 19:25:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:34,512 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 19:25:34,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:34,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247952437] [2024-06-27 19:25:34,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247952437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:34,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:34,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:34,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553699127] [2024-06-27 19:25:34,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:34,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:34,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:34,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:34,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:34,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 152 transitions, 1448 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:34,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:34,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:34,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:34,773 INFO L124 PetriNetUnfolderBase]: 1186/1983 cut-off events. [2024-06-27 19:25:34,773 INFO L125 PetriNetUnfolderBase]: For 54695/54728 co-relation queries the response was YES. [2024-06-27 19:25:34,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12146 conditions, 1983 events. 1186/1983 cut-off events. For 54695/54728 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10744 event pairs, 271 based on Foata normal form. 14/1936 useless extension candidates. Maximal degree in co-relation 12084. Up to 1536 conditions per place. [2024-06-27 19:25:34,785 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 95 selfloop transitions, 57 changer transitions 0/185 dead transitions. [2024-06-27 19:25:34,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 185 transitions, 1930 flow [2024-06-27 19:25:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 19:25:34,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6655052264808362 [2024-06-27 19:25:34,788 INFO L175 Difference]: Start difference. First operand has 136 places, 152 transitions, 1448 flow. Second operand 7 states and 191 transitions. [2024-06-27 19:25:34,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 185 transitions, 1930 flow [2024-06-27 19:25:34,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 185 transitions, 1861 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:34,837 INFO L231 Difference]: Finished difference. Result has 137 places, 154 transitions, 1536 flow [2024-06-27 19:25:34,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1536, PETRI_PLACES=137, PETRI_TRANSITIONS=154} [2024-06-27 19:25:34,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-27 19:25:34,838 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 154 transitions, 1536 flow [2024-06-27 19:25:34,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:34,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:34,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:34,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:25:34,839 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:34,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:34,839 INFO L85 PathProgramCache]: Analyzing trace with hash -793957989, now seen corresponding path program 4 times [2024-06-27 19:25:34,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:34,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631708537] [2024-06-27 19:25:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:34,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:34,910 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 19:25:34,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:34,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631708537] [2024-06-27 19:25:34,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631708537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:34,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:34,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:34,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233541676] [2024-06-27 19:25:34,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:34,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:34,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:34,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:34,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:34,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:34,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 1536 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:34,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:34,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:34,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:35,196 INFO L124 PetriNetUnfolderBase]: 1214/2023 cut-off events. [2024-06-27 19:25:35,196 INFO L125 PetriNetUnfolderBase]: For 56970/57003 co-relation queries the response was YES. [2024-06-27 19:25:35,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12565 conditions, 2023 events. 1214/2023 cut-off events. For 56970/57003 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11046 event pairs, 281 based on Foata normal form. 14/1973 useless extension candidates. Maximal degree in co-relation 12502. Up to 1570 conditions per place. [2024-06-27 19:25:35,209 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 98 selfloop transitions, 53 changer transitions 0/184 dead transitions. [2024-06-27 19:25:35,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 184 transitions, 2014 flow [2024-06-27 19:25:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:25:35,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-27 19:25:35,210 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 1536 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:25:35,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 184 transitions, 2014 flow [2024-06-27 19:25:35,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 184 transitions, 1891 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:35,255 INFO L231 Difference]: Finished difference. Result has 139 places, 156 transitions, 1566 flow [2024-06-27 19:25:35,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1566, PETRI_PLACES=139, PETRI_TRANSITIONS=156} [2024-06-27 19:25:35,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-27 19:25:35,256 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 156 transitions, 1566 flow [2024-06-27 19:25:35,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:35,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:35,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:35,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:25:35,258 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:35,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:35,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1251514325, now seen corresponding path program 1 times [2024-06-27 19:25:35,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:35,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751831130] [2024-06-27 19:25:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:35,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:35,366 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 19:25:35,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:35,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751831130] [2024-06-27 19:25:35,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751831130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:35,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:35,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:35,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943965246] [2024-06-27 19:25:35,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:35,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:35,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:35,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:35,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:35,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:35,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 156 transitions, 1566 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:35,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:35,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:35,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:35,648 INFO L124 PetriNetUnfolderBase]: 1279/2135 cut-off events. [2024-06-27 19:25:35,649 INFO L125 PetriNetUnfolderBase]: For 50409/50409 co-relation queries the response was YES. [2024-06-27 19:25:35,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12954 conditions, 2135 events. 1279/2135 cut-off events. For 50409/50409 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11580 event pairs, 301 based on Foata normal form. 1/2134 useless extension candidates. Maximal degree in co-relation 12890. Up to 1916 conditions per place. [2024-06-27 19:25:35,662 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 151 selfloop transitions, 20 changer transitions 0/179 dead transitions. [2024-06-27 19:25:35,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 179 transitions, 2100 flow [2024-06-27 19:25:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:35,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:25:35,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-27 19:25:35,663 INFO L175 Difference]: Start difference. First operand has 139 places, 156 transitions, 1566 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:25:35,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 179 transitions, 2100 flow [2024-06-27 19:25:35,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 179 transitions, 1981 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:35,718 INFO L231 Difference]: Finished difference. Result has 140 places, 162 transitions, 1591 flow [2024-06-27 19:25:35,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1591, PETRI_PLACES=140, PETRI_TRANSITIONS=162} [2024-06-27 19:25:35,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-27 19:25:35,719 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 162 transitions, 1591 flow [2024-06-27 19:25:35,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:35,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:35,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:35,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:25:35,720 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:35,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:35,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1251394355, now seen corresponding path program 2 times [2024-06-27 19:25:35,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:35,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448703654] [2024-06-27 19:25:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:35,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:35,794 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 19:25:35,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:35,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448703654] [2024-06-27 19:25:35,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448703654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:35,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:35,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:35,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130513398] [2024-06-27 19:25:35,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:35,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:35,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:35,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:35,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:35,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:35,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 162 transitions, 1591 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:35,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:35,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:35,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:36,047 INFO L124 PetriNetUnfolderBase]: 1289/2151 cut-off events. [2024-06-27 19:25:36,047 INFO L125 PetriNetUnfolderBase]: For 52872/52872 co-relation queries the response was YES. [2024-06-27 19:25:36,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13017 conditions, 2151 events. 1289/2151 cut-off events. For 52872/52872 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11665 event pairs, 301 based on Foata normal form. 1/2150 useless extension candidates. Maximal degree in co-relation 12952. Up to 1942 conditions per place. [2024-06-27 19:25:36,062 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 155 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-06-27 19:25:36,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 181 transitions, 2057 flow [2024-06-27 19:25:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:25:36,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-27 19:25:36,063 INFO L175 Difference]: Start difference. First operand has 140 places, 162 transitions, 1591 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:25:36,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 181 transitions, 2057 flow [2024-06-27 19:25:36,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 181 transitions, 1981 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:36,117 INFO L231 Difference]: Finished difference. Result has 144 places, 168 transitions, 1651 flow [2024-06-27 19:25:36,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1651, PETRI_PLACES=144, PETRI_TRANSITIONS=168} [2024-06-27 19:25:36,118 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-27 19:25:36,118 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 168 transitions, 1651 flow [2024-06-27 19:25:36,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:36,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:36,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:36,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:25:36,118 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:36,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:36,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1155580831, now seen corresponding path program 1 times [2024-06-27 19:25:36,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:36,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686624475] [2024-06-27 19:25:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:36,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:36,194 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 19:25:36,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:36,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686624475] [2024-06-27 19:25:36,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686624475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:36,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:36,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:36,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420208500] [2024-06-27 19:25:36,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:36,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:36,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:36,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:36,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:36,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:36,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 168 transitions, 1651 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:36,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:36,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:36,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:36,495 INFO L124 PetriNetUnfolderBase]: 1314/2187 cut-off events. [2024-06-27 19:25:36,495 INFO L125 PetriNetUnfolderBase]: For 56403/56403 co-relation queries the response was YES. [2024-06-27 19:25:36,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13289 conditions, 2187 events. 1314/2187 cut-off events. For 56403/56403 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11909 event pairs, 310 based on Foata normal form. 2/2184 useless extension candidates. Maximal degree in co-relation 13222. Up to 1887 conditions per place. [2024-06-27 19:25:36,513 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 143 selfloop transitions, 42 changer transitions 0/193 dead transitions. [2024-06-27 19:25:36,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 193 transitions, 2217 flow [2024-06-27 19:25:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:25:36,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 19:25:36,514 INFO L175 Difference]: Start difference. First operand has 144 places, 168 transitions, 1651 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:25:36,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 193 transitions, 2217 flow [2024-06-27 19:25:36,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 193 transitions, 2153 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:36,590 INFO L231 Difference]: Finished difference. Result has 148 places, 179 transitions, 1799 flow [2024-06-27 19:25:36,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1799, PETRI_PLACES=148, PETRI_TRANSITIONS=179} [2024-06-27 19:25:36,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-27 19:25:36,590 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 179 transitions, 1799 flow [2024-06-27 19:25:36,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:36,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:36,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:36,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:25:36,591 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:36,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash 245960603, now seen corresponding path program 3 times [2024-06-27 19:25:36,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:36,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549357104] [2024-06-27 19:25:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:36,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:36,670 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 19:25:36,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:36,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549357104] [2024-06-27 19:25:36,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549357104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:36,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:36,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:36,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945543365] [2024-06-27 19:25:36,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:36,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:36,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:36,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:36,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 179 transitions, 1799 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:36,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:36,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:36,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:36,960 INFO L124 PetriNetUnfolderBase]: 1311/2186 cut-off events. [2024-06-27 19:25:36,960 INFO L125 PetriNetUnfolderBase]: For 58251/58251 co-relation queries the response was YES. [2024-06-27 19:25:36,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13435 conditions, 2186 events. 1311/2186 cut-off events. For 58251/58251 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11882 event pairs, 299 based on Foata normal form. 1/2185 useless extension candidates. Maximal degree in co-relation 13366. Up to 1961 conditions per place. [2024-06-27 19:25:36,978 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 163 selfloop transitions, 23 changer transitions 0/194 dead transitions. [2024-06-27 19:25:36,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 194 transitions, 2209 flow [2024-06-27 19:25:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-27 19:25:36,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-27 19:25:36,979 INFO L175 Difference]: Start difference. First operand has 148 places, 179 transitions, 1799 flow. Second operand 5 states and 126 transitions. [2024-06-27 19:25:36,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 194 transitions, 2209 flow [2024-06-27 19:25:37,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 194 transitions, 2130 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:37,045 INFO L231 Difference]: Finished difference. Result has 151 places, 179 transitions, 1780 flow [2024-06-27 19:25:37,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1780, PETRI_PLACES=151, PETRI_TRANSITIONS=179} [2024-06-27 19:25:37,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-27 19:25:37,045 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 179 transitions, 1780 flow [2024-06-27 19:25:37,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:37,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:37,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:37,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:25:37,046 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:37,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:37,046 INFO L85 PathProgramCache]: Analyzing trace with hash 208661279, now seen corresponding path program 2 times [2024-06-27 19:25:37,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:37,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57423851] [2024-06-27 19:25:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:37,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:37,110 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 19:25:37,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:37,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57423851] [2024-06-27 19:25:37,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57423851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:37,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:37,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:37,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425084363] [2024-06-27 19:25:37,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:37,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:37,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:37,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:37,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:37,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:37,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 179 transitions, 1780 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:37,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:37,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:37,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:37,348 INFO L124 PetriNetUnfolderBase]: 1321/2200 cut-off events. [2024-06-27 19:25:37,348 INFO L125 PetriNetUnfolderBase]: For 62806/62809 co-relation queries the response was YES. [2024-06-27 19:25:37,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13536 conditions, 2200 events. 1321/2200 cut-off events. For 62806/62809 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11980 event pairs, 329 based on Foata normal form. 4/2197 useless extension candidates. Maximal degree in co-relation 13466. Up to 1893 conditions per place. [2024-06-27 19:25:37,365 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 139 selfloop transitions, 46 changer transitions 0/193 dead transitions. [2024-06-27 19:25:37,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 193 transitions, 2286 flow [2024-06-27 19:25:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 19:25:37,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:25:37,366 INFO L175 Difference]: Start difference. First operand has 151 places, 179 transitions, 1780 flow. Second operand 5 states and 125 transitions. [2024-06-27 19:25:37,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 193 transitions, 2286 flow [2024-06-27 19:25:37,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 193 transitions, 2236 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:37,440 INFO L231 Difference]: Finished difference. Result has 152 places, 183 transitions, 1877 flow [2024-06-27 19:25:37,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1732, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1877, PETRI_PLACES=152, PETRI_TRANSITIONS=183} [2024-06-27 19:25:37,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-27 19:25:37,441 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 183 transitions, 1877 flow [2024-06-27 19:25:37,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:37,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:37,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:37,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:25:37,442 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:37,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:37,442 INFO L85 PathProgramCache]: Analyzing trace with hash 126910471, now seen corresponding path program 3 times [2024-06-27 19:25:37,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:37,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644888942] [2024-06-27 19:25:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:37,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:37,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:37,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644888942] [2024-06-27 19:25:37,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644888942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:37,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:37,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:37,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010799141] [2024-06-27 19:25:37,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:37,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:37,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:37,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:37,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 183 transitions, 1877 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:37,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:37,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:37,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:37,753 INFO L124 PetriNetUnfolderBase]: 1301/2165 cut-off events. [2024-06-27 19:25:37,753 INFO L125 PetriNetUnfolderBase]: For 60836/60836 co-relation queries the response was YES. [2024-06-27 19:25:37,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13399 conditions, 2165 events. 1301/2165 cut-off events. For 60836/60836 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11748 event pairs, 308 based on Foata normal form. 2/2162 useless extension candidates. Maximal degree in co-relation 13328. Up to 1864 conditions per place. [2024-06-27 19:25:37,771 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 141 selfloop transitions, 46 changer transitions 0/195 dead transitions. [2024-06-27 19:25:37,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 195 transitions, 2281 flow [2024-06-27 19:25:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:25:37,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-27 19:25:37,772 INFO L175 Difference]: Start difference. First operand has 152 places, 183 transitions, 1877 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:25:37,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 195 transitions, 2281 flow [2024-06-27 19:25:37,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 195 transitions, 2167 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:37,850 INFO L231 Difference]: Finished difference. Result has 154 places, 183 transitions, 1871 flow [2024-06-27 19:25:37,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1871, PETRI_PLACES=154, PETRI_TRANSITIONS=183} [2024-06-27 19:25:37,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-27 19:25:37,850 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 183 transitions, 1871 flow [2024-06-27 19:25:37,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:37,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:37,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:37,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:25:37,851 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:37,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:37,851 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-27 19:25:37,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:37,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533270509] [2024-06-27 19:25:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:37,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:37,931 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 19:25:37,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:37,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533270509] [2024-06-27 19:25:37,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533270509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:37,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:37,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:37,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931885139] [2024-06-27 19:25:37,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:37,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:37,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:37,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:37,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:37,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:37,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 183 transitions, 1871 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 19:25:37,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:37,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:37,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:38,194 INFO L124 PetriNetUnfolderBase]: 1263/2117 cut-off events. [2024-06-27 19:25:38,194 INFO L125 PetriNetUnfolderBase]: For 67652/67666 co-relation queries the response was YES. [2024-06-27 19:25:38,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13183 conditions, 2117 events. 1263/2117 cut-off events. For 67652/67666 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11657 event pairs, 312 based on Foata normal form. 24/2129 useless extension candidates. Maximal degree in co-relation 13112. Up to 1754 conditions per place. [2024-06-27 19:25:38,210 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 148 selfloop transitions, 22 changer transitions 0/198 dead transitions. [2024-06-27 19:25:38,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 198 transitions, 2283 flow [2024-06-27 19:25:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-27 19:25:38,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-27 19:25:38,211 INFO L175 Difference]: Start difference. First operand has 154 places, 183 transitions, 1871 flow. Second operand 5 states and 128 transitions. [2024-06-27 19:25:38,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 198 transitions, 2283 flow [2024-06-27 19:25:38,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 198 transitions, 2171 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:38,294 INFO L231 Difference]: Finished difference. Result has 155 places, 185 transitions, 1838 flow [2024-06-27 19:25:38,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1838, PETRI_PLACES=155, PETRI_TRANSITIONS=185} [2024-06-27 19:25:38,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-27 19:25:38,294 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 185 transitions, 1838 flow [2024-06-27 19:25:38,295 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 19:25:38,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:38,295 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 19:25:38,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:25:38,295 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:38,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:38,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1624697446, now seen corresponding path program 1 times [2024-06-27 19:25:38,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:38,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713096658] [2024-06-27 19:25:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:38,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:38,373 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 19:25:38,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:38,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713096658] [2024-06-27 19:25:38,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713096658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:38,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:38,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:38,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054481913] [2024-06-27 19:25:38,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:38,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:38,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:38,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:38,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:38,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:38,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 185 transitions, 1838 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:38,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:38,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:38,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:38,749 INFO L124 PetriNetUnfolderBase]: 1459/2432 cut-off events. [2024-06-27 19:25:38,749 INFO L125 PetriNetUnfolderBase]: For 75960/75960 co-relation queries the response was YES. [2024-06-27 19:25:38,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15066 conditions, 2432 events. 1459/2432 cut-off events. For 75960/75960 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13489 event pairs, 238 based on Foata normal form. 12/2442 useless extension candidates. Maximal degree in co-relation 14994. Up to 1912 conditions per place. [2024-06-27 19:25:38,767 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 210 selfloop transitions, 20 changer transitions 0/238 dead transitions. [2024-06-27 19:25:38,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 238 transitions, 2644 flow [2024-06-27 19:25:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:25:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:25:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:25:38,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-27 19:25:38,777 INFO L175 Difference]: Start difference. First operand has 155 places, 185 transitions, 1838 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:25:38,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 238 transitions, 2644 flow [2024-06-27 19:25:38,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 238 transitions, 2587 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:38,851 INFO L231 Difference]: Finished difference. Result has 163 places, 190 transitions, 1909 flow [2024-06-27 19:25:38,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1909, PETRI_PLACES=163, PETRI_TRANSITIONS=190} [2024-06-27 19:25:38,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-27 19:25:38,852 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 190 transitions, 1909 flow [2024-06-27 19:25:38,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:38,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:38,852 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 19:25:38,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:25:38,852 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:38,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1550389402, now seen corresponding path program 2 times [2024-06-27 19:25:38,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:38,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59023725] [2024-06-27 19:25:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:38,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:38,944 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 19:25:38,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:38,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59023725] [2024-06-27 19:25:38,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59023725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:38,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:38,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:38,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193009923] [2024-06-27 19:25:38,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:38,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:38,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:38,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:38,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:39,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:39,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 190 transitions, 1909 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:39,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:39,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:39,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:39,329 INFO L124 PetriNetUnfolderBase]: 1500/2503 cut-off events. [2024-06-27 19:25:39,329 INFO L125 PetriNetUnfolderBase]: For 80344/80344 co-relation queries the response was YES. [2024-06-27 19:25:39,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15608 conditions, 2503 events. 1500/2503 cut-off events. For 80344/80344 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13967 event pairs, 319 based on Foata normal form. 12/2513 useless extension candidates. Maximal degree in co-relation 15533. Up to 2046 conditions per place. [2024-06-27 19:25:39,350 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 209 selfloop transitions, 18 changer transitions 0/235 dead transitions. [2024-06-27 19:25:39,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 235 transitions, 2672 flow [2024-06-27 19:25:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:25:39,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:25:39,352 INFO L175 Difference]: Start difference. First operand has 163 places, 190 transitions, 1909 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:25:39,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 235 transitions, 2672 flow [2024-06-27 19:25:39,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 235 transitions, 2624 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:39,457 INFO L231 Difference]: Finished difference. Result has 168 places, 193 transitions, 1961 flow [2024-06-27 19:25:39,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1961, PETRI_PLACES=168, PETRI_TRANSITIONS=193} [2024-06-27 19:25:39,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-27 19:25:39,457 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 193 transitions, 1961 flow [2024-06-27 19:25:39,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:39,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:39,458 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 19:25:39,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:25:39,458 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:39,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash -762433420, now seen corresponding path program 3 times [2024-06-27 19:25:39,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:39,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448734305] [2024-06-27 19:25:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:39,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:39,559 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 19:25:39,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:39,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448734305] [2024-06-27 19:25:39,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448734305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:39,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:39,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:39,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493524507] [2024-06-27 19:25:39,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:39,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:39,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:39,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:39,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:39,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 193 transitions, 1961 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:39,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:39,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:39,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:39,938 INFO L124 PetriNetUnfolderBase]: 1472/2459 cut-off events. [2024-06-27 19:25:39,938 INFO L125 PetriNetUnfolderBase]: For 79047/79047 co-relation queries the response was YES. [2024-06-27 19:25:39,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15030 conditions, 2459 events. 1472/2459 cut-off events. For 79047/79047 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13659 event pairs, 320 based on Foata normal form. 16/2473 useless extension candidates. Maximal degree in co-relation 14952. Up to 2125 conditions per place. [2024-06-27 19:25:39,957 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 206 selfloop transitions, 17 changer transitions 0/231 dead transitions. [2024-06-27 19:25:39,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 231 transitions, 2541 flow [2024-06-27 19:25:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:25:39,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:25:39,958 INFO L175 Difference]: Start difference. First operand has 168 places, 193 transitions, 1961 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:25:39,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 231 transitions, 2541 flow [2024-06-27 19:25:40,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 231 transitions, 2481 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:40,063 INFO L231 Difference]: Finished difference. Result has 172 places, 194 transitions, 1966 flow [2024-06-27 19:25:40,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1966, PETRI_PLACES=172, PETRI_TRANSITIONS=194} [2024-06-27 19:25:40,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-27 19:25:40,063 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 194 transitions, 1966 flow [2024-06-27 19:25:40,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:40,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:40,064 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 19:25:40,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:25:40,064 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:40,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:40,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2094764292, now seen corresponding path program 4 times [2024-06-27 19:25:40,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:40,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193051209] [2024-06-27 19:25:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:40,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:40,154 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 19:25:40,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:40,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193051209] [2024-06-27 19:25:40,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193051209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:40,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:40,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:40,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080571699] [2024-06-27 19:25:40,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:40,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:40,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:40,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:40,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 194 transitions, 1966 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:40,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:40,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:40,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:40,501 INFO L124 PetriNetUnfolderBase]: 1530/2567 cut-off events. [2024-06-27 19:25:40,502 INFO L125 PetriNetUnfolderBase]: For 82957/82960 co-relation queries the response was YES. [2024-06-27 19:25:40,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15474 conditions, 2567 events. 1530/2567 cut-off events. For 82957/82960 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14545 event pairs, 345 based on Foata normal form. 16/2579 useless extension candidates. Maximal degree in co-relation 15394. Up to 2097 conditions per place. [2024-06-27 19:25:40,522 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 172 selfloop transitions, 49 changer transitions 0/229 dead transitions. [2024-06-27 19:25:40,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 229 transitions, 2530 flow [2024-06-27 19:25:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:25:40,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:25:40,524 INFO L175 Difference]: Start difference. First operand has 172 places, 194 transitions, 1966 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:25:40,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 229 transitions, 2530 flow [2024-06-27 19:25:40,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 229 transitions, 2499 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:40,654 INFO L231 Difference]: Finished difference. Result has 174 places, 195 transitions, 2060 flow [2024-06-27 19:25:40,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2060, PETRI_PLACES=174, PETRI_TRANSITIONS=195} [2024-06-27 19:25:40,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-27 19:25:40,655 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 195 transitions, 2060 flow [2024-06-27 19:25:40,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:40,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:40,655 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 19:25:40,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:25:40,656 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:40,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash 234226744, now seen corresponding path program 5 times [2024-06-27 19:25:40,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:40,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576280363] [2024-06-27 19:25:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:40,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:40,730 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 19:25:40,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:40,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576280363] [2024-06-27 19:25:40,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576280363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:40,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:40,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:40,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863125314] [2024-06-27 19:25:40,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:40,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:40,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:40,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:40,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:40,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:40,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 195 transitions, 2060 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:40,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:40,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:40,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:41,156 INFO L124 PetriNetUnfolderBase]: 1657/2790 cut-off events. [2024-06-27 19:25:41,156 INFO L125 PetriNetUnfolderBase]: For 96601/96604 co-relation queries the response was YES. [2024-06-27 19:25:41,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17284 conditions, 2790 events. 1657/2790 cut-off events. For 96601/96604 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16278 event pairs, 369 based on Foata normal form. 12/2798 useless extension candidates. Maximal degree in co-relation 17203. Up to 2095 conditions per place. [2024-06-27 19:25:41,176 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 51 changer transitions 0/237 dead transitions. [2024-06-27 19:25:41,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 237 transitions, 2832 flow [2024-06-27 19:25:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:41,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:25:41,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-27 19:25:41,177 INFO L175 Difference]: Start difference. First operand has 174 places, 195 transitions, 2060 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:25:41,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 237 transitions, 2832 flow [2024-06-27 19:25:41,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 237 transitions, 2725 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:41,325 INFO L231 Difference]: Finished difference. Result has 177 places, 198 transitions, 2123 flow [2024-06-27 19:25:41,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2123, PETRI_PLACES=177, PETRI_TRANSITIONS=198} [2024-06-27 19:25:41,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-27 19:25:41,326 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 198 transitions, 2123 flow [2024-06-27 19:25:41,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:41,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:41,326 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 19:25:41,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:25:41,327 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:41,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:41,327 INFO L85 PathProgramCache]: Analyzing trace with hash 677873572, now seen corresponding path program 6 times [2024-06-27 19:25:41,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:41,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678971572] [2024-06-27 19:25:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:41,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:41,413 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 19:25:41,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678971572] [2024-06-27 19:25:41,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678971572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:41,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:41,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:41,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352901211] [2024-06-27 19:25:41,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:41,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:41,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:41,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:41,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 198 transitions, 2123 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:41,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:41,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:41,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:41,784 INFO L124 PetriNetUnfolderBase]: 1629/2746 cut-off events. [2024-06-27 19:25:41,784 INFO L125 PetriNetUnfolderBase]: For 93764/93767 co-relation queries the response was YES. [2024-06-27 19:25:41,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16681 conditions, 2746 events. 1629/2746 cut-off events. For 93764/93767 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15971 event pairs, 370 based on Foata normal form. 16/2758 useless extension candidates. Maximal degree in co-relation 16598. Up to 2266 conditions per place. [2024-06-27 19:25:41,807 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 50 changer transitions 0/233 dead transitions. [2024-06-27 19:25:41,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 233 transitions, 2700 flow [2024-06-27 19:25:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:25:41,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:25:41,808 INFO L175 Difference]: Start difference. First operand has 177 places, 198 transitions, 2123 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:25:41,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 233 transitions, 2700 flow [2024-06-27 19:25:41,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 233 transitions, 2606 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:41,963 INFO L231 Difference]: Finished difference. Result has 181 places, 199 transitions, 2161 flow [2024-06-27 19:25:41,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2161, PETRI_PLACES=181, PETRI_TRANSITIONS=199} [2024-06-27 19:25:41,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-27 19:25:41,963 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 199 transitions, 2161 flow [2024-06-27 19:25:41,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:41,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:41,964 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 19:25:41,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:25:41,964 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:41,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:41,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1043442410, now seen corresponding path program 1 times [2024-06-27 19:25:41,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:41,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416236736] [2024-06-27 19:25:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:41,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:42,040 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 19:25:42,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:42,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416236736] [2024-06-27 19:25:42,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416236736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:42,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:42,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:42,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566238605] [2024-06-27 19:25:42,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:42,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:42,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:42,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:42,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:42,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 199 transitions, 2161 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:42,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:42,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:42,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:42,423 INFO L124 PetriNetUnfolderBase]: 1670/2817 cut-off events. [2024-06-27 19:25:42,424 INFO L125 PetriNetUnfolderBase]: For 94720/94723 co-relation queries the response was YES. [2024-06-27 19:25:42,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17078 conditions, 2817 events. 1670/2817 cut-off events. For 94720/94723 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16542 event pairs, 361 based on Foata normal form. 12/2825 useless extension candidates. Maximal degree in co-relation 16993. Up to 2066 conditions per place. [2024-06-27 19:25:42,447 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 54 changer transitions 0/237 dead transitions. [2024-06-27 19:25:42,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 237 transitions, 2761 flow [2024-06-27 19:25:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:25:42,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:25:42,449 INFO L175 Difference]: Start difference. First operand has 181 places, 199 transitions, 2161 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:25:42,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 237 transitions, 2761 flow [2024-06-27 19:25:42,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 237 transitions, 2662 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:42,638 INFO L231 Difference]: Finished difference. Result has 183 places, 200 transitions, 2200 flow [2024-06-27 19:25:42,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2200, PETRI_PLACES=183, PETRI_TRANSITIONS=200} [2024-06-27 19:25:42,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-27 19:25:42,639 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 200 transitions, 2200 flow [2024-06-27 19:25:42,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:42,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:42,639 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 19:25:42,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:25:42,640 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:42,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1131597110, now seen corresponding path program 7 times [2024-06-27 19:25:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:42,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634433682] [2024-06-27 19:25:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:42,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:42,730 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 19:25:42,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:42,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634433682] [2024-06-27 19:25:42,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634433682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:42,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:42,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:42,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412968135] [2024-06-27 19:25:42,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:42,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:42,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:42,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:42,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:42,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:42,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 200 transitions, 2200 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:42,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:42,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:42,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:43,170 INFO L124 PetriNetUnfolderBase]: 1728/2915 cut-off events. [2024-06-27 19:25:43,170 INFO L125 PetriNetUnfolderBase]: For 103380/103380 co-relation queries the response was YES. [2024-06-27 19:25:43,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17752 conditions, 2915 events. 1728/2915 cut-off events. For 103380/103380 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17399 event pairs, 401 based on Foata normal form. 16/2923 useless extension candidates. Maximal degree in co-relation 17666. Up to 2435 conditions per place. [2024-06-27 19:25:43,193 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 49 changer transitions 0/232 dead transitions. [2024-06-27 19:25:43,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 232 transitions, 2768 flow [2024-06-27 19:25:43,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:25:43,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:25:43,194 INFO L175 Difference]: Start difference. First operand has 183 places, 200 transitions, 2200 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:25:43,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 232 transitions, 2768 flow [2024-06-27 19:25:43,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 232 transitions, 2644 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:43,376 INFO L231 Difference]: Finished difference. Result has 185 places, 201 transitions, 2207 flow [2024-06-27 19:25:43,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2076, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2207, PETRI_PLACES=185, PETRI_TRANSITIONS=201} [2024-06-27 19:25:43,377 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-27 19:25:43,377 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 201 transitions, 2207 flow [2024-06-27 19:25:43,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:43,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:43,377 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 19:25:43,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:25:43,378 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:43,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:43,378 INFO L85 PathProgramCache]: Analyzing trace with hash -705760712, now seen corresponding path program 8 times [2024-06-27 19:25:43,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:43,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454181087] [2024-06-27 19:25:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:43,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:43,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:43,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454181087] [2024-06-27 19:25:43,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454181087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:43,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:43,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:43,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706371629] [2024-06-27 19:25:43,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:43,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:43,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:43,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:43,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:43,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:43,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 201 transitions, 2207 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:43,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:43,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:43,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:43,857 INFO L124 PetriNetUnfolderBase]: 1786/3023 cut-off events. [2024-06-27 19:25:43,857 INFO L125 PetriNetUnfolderBase]: For 108397/108397 co-relation queries the response was YES. [2024-06-27 19:25:43,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18250 conditions, 3023 events. 1786/3023 cut-off events. For 108397/108397 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18211 event pairs, 416 based on Foata normal form. 16/3031 useless extension candidates. Maximal degree in co-relation 18163. Up to 2533 conditions per place. [2024-06-27 19:25:43,882 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 50 changer transitions 0/233 dead transitions. [2024-06-27 19:25:43,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 233 transitions, 2779 flow [2024-06-27 19:25:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:43,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:25:43,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-27 19:25:43,886 INFO L175 Difference]: Start difference. First operand has 185 places, 201 transitions, 2207 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:25:43,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 233 transitions, 2779 flow [2024-06-27 19:25:44,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 233 transitions, 2666 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:44,138 INFO L231 Difference]: Finished difference. Result has 187 places, 202 transitions, 2229 flow [2024-06-27 19:25:44,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2229, PETRI_PLACES=187, PETRI_TRANSITIONS=202} [2024-06-27 19:25:44,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-27 19:25:44,139 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 202 transitions, 2229 flow [2024-06-27 19:25:44,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:44,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:44,139 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 19:25:44,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:25:44,139 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:44,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash -705908582, now seen corresponding path program 9 times [2024-06-27 19:25:44,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:44,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397738576] [2024-06-27 19:25:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:44,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:44,221 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 19:25:44,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:44,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397738576] [2024-06-27 19:25:44,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397738576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:44,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:44,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:44,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610005243] [2024-06-27 19:25:44,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:44,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:44,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:44,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:44,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:44,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 202 transitions, 2229 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:44,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:44,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:44,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:44,645 INFO L124 PetriNetUnfolderBase]: 1888/3197 cut-off events. [2024-06-27 19:25:44,645 INFO L125 PetriNetUnfolderBase]: For 121198/121198 co-relation queries the response was YES. [2024-06-27 19:25:44,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19626 conditions, 3197 events. 1888/3197 cut-off events. For 121198/121198 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 19498 event pairs, 433 based on Foata normal form. 12/3201 useless extension candidates. Maximal degree in co-relation 19538. Up to 2400 conditions per place. [2024-06-27 19:25:44,673 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 53 changer transitions 0/241 dead transitions. [2024-06-27 19:25:44,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 241 transitions, 3037 flow [2024-06-27 19:25:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:44,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:25:44,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:25:44,674 INFO L175 Difference]: Start difference. First operand has 187 places, 202 transitions, 2229 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:25:44,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 241 transitions, 3037 flow [2024-06-27 19:25:44,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 241 transitions, 2920 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:44,883 INFO L231 Difference]: Finished difference. Result has 190 places, 205 transitions, 2305 flow [2024-06-27 19:25:44,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2305, PETRI_PLACES=190, PETRI_TRANSITIONS=205} [2024-06-27 19:25:44,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-27 19:25:44,884 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 205 transitions, 2305 flow [2024-06-27 19:25:44,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:44,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:44,884 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 19:25:44,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:25:44,884 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:44,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:44,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1177395316, now seen corresponding path program 10 times [2024-06-27 19:25:44,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:44,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154151846] [2024-06-27 19:25:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:44,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:44,962 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 19:25:44,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:44,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154151846] [2024-06-27 19:25:44,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154151846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:44,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:44,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:44,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544548213] [2024-06-27 19:25:44,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:44,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:44,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:44,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:44,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:45,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:45,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 205 transitions, 2305 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:45,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:45,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:45,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:45,447 INFO L124 PetriNetUnfolderBase]: 1860/3153 cut-off events. [2024-06-27 19:25:45,447 INFO L125 PetriNetUnfolderBase]: For 116081/116081 co-relation queries the response was YES. [2024-06-27 19:25:45,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18865 conditions, 3153 events. 1860/3153 cut-off events. For 116081/116081 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19245 event pairs, 434 based on Foata normal form. 16/3161 useless extension candidates. Maximal degree in co-relation 18775. Up to 2663 conditions per place. [2024-06-27 19:25:45,477 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 177 selfloop transitions, 52 changer transitions 0/237 dead transitions. [2024-06-27 19:25:45,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 237 transitions, 2890 flow [2024-06-27 19:25:45,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:25:45,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:25:45,478 INFO L175 Difference]: Start difference. First operand has 190 places, 205 transitions, 2305 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:25:45,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 237 transitions, 2890 flow [2024-06-27 19:25:45,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 237 transitions, 2774 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:45,738 INFO L231 Difference]: Finished difference. Result has 194 places, 206 transitions, 2333 flow [2024-06-27 19:25:45,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2333, PETRI_PLACES=194, PETRI_TRANSITIONS=206} [2024-06-27 19:25:45,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-27 19:25:45,738 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 206 transitions, 2333 flow [2024-06-27 19:25:45,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:45,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:45,738 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 19:25:45,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:25:45,738 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:45,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:45,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1433181206, now seen corresponding path program 2 times [2024-06-27 19:25:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:45,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241729669] [2024-06-27 19:25:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:45,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:45,811 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 19:25:45,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:45,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241729669] [2024-06-27 19:25:45,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241729669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:45,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:45,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250209129] [2024-06-27 19:25:45,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:45,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:45,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:45,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:45,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 206 transitions, 2333 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:45,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:45,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:45,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:46,237 INFO L124 PetriNetUnfolderBase]: 1901/3234 cut-off events. [2024-06-27 19:25:46,237 INFO L125 PetriNetUnfolderBase]: For 115672/115672 co-relation queries the response was YES. [2024-06-27 19:25:46,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19213 conditions, 3234 events. 1901/3234 cut-off events. For 115672/115672 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19880 event pairs, 434 based on Foata normal form. 12/3238 useless extension candidates. Maximal degree in co-relation 19121. Up to 2647 conditions per place. [2024-06-27 19:25:46,267 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 54 changer transitions 0/241 dead transitions. [2024-06-27 19:25:46,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 241 transitions, 2941 flow [2024-06-27 19:25:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:25:46,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-27 19:25:46,268 INFO L175 Difference]: Start difference. First operand has 194 places, 206 transitions, 2333 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:25:46,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 241 transitions, 2941 flow [2024-06-27 19:25:46,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 241 transitions, 2836 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:46,547 INFO L231 Difference]: Finished difference. Result has 196 places, 207 transitions, 2374 flow [2024-06-27 19:25:46,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2374, PETRI_PLACES=196, PETRI_TRANSITIONS=207} [2024-06-27 19:25:46,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-27 19:25:46,548 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 207 transitions, 2374 flow [2024-06-27 19:25:46,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:46,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:46,548 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 19:25:46,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:25:46,548 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:46,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash -254637242, now seen corresponding path program 3 times [2024-06-27 19:25:46,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:46,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628396649] [2024-06-27 19:25:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:46,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:46,629 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 19:25:46,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:46,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628396649] [2024-06-27 19:25:46,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628396649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:46,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:46,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:46,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339826061] [2024-06-27 19:25:46,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:46,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:46,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:46,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:46,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:46,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:46,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 207 transitions, 2374 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:46,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:46,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:46,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:47,066 INFO L124 PetriNetUnfolderBase]: 1942/3310 cut-off events. [2024-06-27 19:25:47,066 INFO L125 PetriNetUnfolderBase]: For 122325/122325 co-relation queries the response was YES. [2024-06-27 19:25:47,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19726 conditions, 3310 events. 1942/3310 cut-off events. For 122325/122325 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20552 event pairs, 449 based on Foata normal form. 12/3314 useless extension candidates. Maximal degree in co-relation 19633. Up to 2626 conditions per place. [2024-06-27 19:25:47,096 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 182 selfloop transitions, 52 changer transitions 0/242 dead transitions. [2024-06-27 19:25:47,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 242 transitions, 2986 flow [2024-06-27 19:25:47,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:25:47,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:25:47,097 INFO L175 Difference]: Start difference. First operand has 196 places, 207 transitions, 2374 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:25:47,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 242 transitions, 2986 flow [2024-06-27 19:25:47,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 242 transitions, 2854 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:47,326 INFO L231 Difference]: Finished difference. Result has 198 places, 208 transitions, 2386 flow [2024-06-27 19:25:47,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2386, PETRI_PLACES=198, PETRI_TRANSITIONS=208} [2024-06-27 19:25:47,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-27 19:25:47,326 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 208 transitions, 2386 flow [2024-06-27 19:25:47,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:47,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:47,326 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 19:25:47,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:25:47,327 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:47,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:47,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1746880436, now seen corresponding path program 4 times [2024-06-27 19:25:47,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:47,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299083178] [2024-06-27 19:25:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:47,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:47,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:47,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299083178] [2024-06-27 19:25:47,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299083178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:47,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:47,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:47,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124188241] [2024-06-27 19:25:47,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:47,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:47,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:47,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:47,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:47,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:47,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 208 transitions, 2386 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:47,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:47,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:47,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:47,889 INFO L124 PetriNetUnfolderBase]: 1922/3288 cut-off events. [2024-06-27 19:25:47,889 INFO L125 PetriNetUnfolderBase]: For 114323/114323 co-relation queries the response was YES. [2024-06-27 19:25:47,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19008 conditions, 3288 events. 1922/3288 cut-off events. For 114323/114323 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20364 event pairs, 394 based on Foata normal form. 12/3292 useless extension candidates. Maximal degree in co-relation 18914. Up to 1942 conditions per place. [2024-06-27 19:25:47,916 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 66 changer transitions 0/242 dead transitions. [2024-06-27 19:25:47,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 242 transitions, 2884 flow [2024-06-27 19:25:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:25:47,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:25:47,917 INFO L175 Difference]: Start difference. First operand has 198 places, 208 transitions, 2386 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:25:47,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 242 transitions, 2884 flow [2024-06-27 19:25:48,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 242 transitions, 2754 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:48,189 INFO L231 Difference]: Finished difference. Result has 199 places, 207 transitions, 2308 flow [2024-06-27 19:25:48,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2308, PETRI_PLACES=199, PETRI_TRANSITIONS=207} [2024-06-27 19:25:48,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-27 19:25:48,189 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 207 transitions, 2308 flow [2024-06-27 19:25:48,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:25:48,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:48,190 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 19:25:48,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:25:48,190 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:48,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:48,190 INFO L85 PathProgramCache]: Analyzing trace with hash -568845454, now seen corresponding path program 1 times [2024-06-27 19:25:48,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:48,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075136338] [2024-06-27 19:25:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:48,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:48,260 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 19:25:48,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:48,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075136338] [2024-06-27 19:25:48,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075136338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:48,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:48,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:48,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714221770] [2024-06-27 19:25:48,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:48,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:48,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:48,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:48,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:48,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 207 transitions, 2308 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:48,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:48,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:48,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:48,651 INFO L124 PetriNetUnfolderBase]: 1950/3331 cut-off events. [2024-06-27 19:25:48,651 INFO L125 PetriNetUnfolderBase]: For 110743/110743 co-relation queries the response was YES. [2024-06-27 19:25:48,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19449 conditions, 3331 events. 1950/3331 cut-off events. For 110743/110743 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20758 event pairs, 444 based on Foata normal form. 2/3328 useless extension candidates. Maximal degree in co-relation 19354. Up to 2854 conditions per place. [2024-06-27 19:25:48,682 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 64 changer transitions 0/239 dead transitions. [2024-06-27 19:25:48,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 239 transitions, 3200 flow [2024-06-27 19:25:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:25:48,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:25:48,683 INFO L175 Difference]: Start difference. First operand has 199 places, 207 transitions, 2308 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:25:48,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 239 transitions, 3200 flow [2024-06-27 19:25:48,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 239 transitions, 2949 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 19:25:48,960 INFO L231 Difference]: Finished difference. Result has 198 places, 218 transitions, 2364 flow [2024-06-27 19:25:48,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2364, PETRI_PLACES=198, PETRI_TRANSITIONS=218} [2024-06-27 19:25:48,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-27 19:25:48,960 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 218 transitions, 2364 flow [2024-06-27 19:25:48,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:48,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:48,961 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 19:25:48,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:25:48,961 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:48,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:48,961 INFO L85 PathProgramCache]: Analyzing trace with hash -565126384, now seen corresponding path program 2 times [2024-06-27 19:25:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:48,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075987305] [2024-06-27 19:25:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:48,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:49,038 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 19:25:49,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:49,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075987305] [2024-06-27 19:25:49,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075987305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:49,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:49,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:49,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582865945] [2024-06-27 19:25:49,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:49,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:49,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:49,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:49,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:49,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:49,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 218 transitions, 2364 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:49,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:49,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:49,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:49,460 INFO L124 PetriNetUnfolderBase]: 1986/3392 cut-off events. [2024-06-27 19:25:49,460 INFO L125 PetriNetUnfolderBase]: For 118622/118622 co-relation queries the response was YES. [2024-06-27 19:25:49,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19752 conditions, 3392 events. 1986/3392 cut-off events. For 118622/118622 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21231 event pairs, 446 based on Foata normal form. 2/3389 useless extension candidates. Maximal degree in co-relation 19658. Up to 2983 conditions per place. [2024-06-27 19:25:49,491 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 183 selfloop transitions, 51 changer transitions 0/242 dead transitions. [2024-06-27 19:25:49,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 242 transitions, 3116 flow [2024-06-27 19:25:49,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:25:49,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-27 19:25:49,492 INFO L175 Difference]: Start difference. First operand has 198 places, 218 transitions, 2364 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:25:49,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 242 transitions, 3116 flow [2024-06-27 19:25:49,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 242 transitions, 3001 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:49,762 INFO L231 Difference]: Finished difference. Result has 204 places, 226 transitions, 2510 flow [2024-06-27 19:25:49,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2510, PETRI_PLACES=204, PETRI_TRANSITIONS=226} [2024-06-27 19:25:49,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-27 19:25:49,763 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 226 transitions, 2510 flow [2024-06-27 19:25:49,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:49,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:49,763 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 19:25:49,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:25:49,764 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:49,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash -565120804, now seen corresponding path program 3 times [2024-06-27 19:25:49,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:49,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759288515] [2024-06-27 19:25:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:49,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:49,842 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 19:25:49,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:49,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759288515] [2024-06-27 19:25:49,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759288515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:49,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:49,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:49,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431796300] [2024-06-27 19:25:49,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:49,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:49,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:49,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:49,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:49,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:49,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 226 transitions, 2510 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:49,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:49,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:49,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:50,345 INFO L124 PetriNetUnfolderBase]: 1988/3397 cut-off events. [2024-06-27 19:25:50,345 INFO L125 PetriNetUnfolderBase]: For 122572/122572 co-relation queries the response was YES. [2024-06-27 19:25:50,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19994 conditions, 3397 events. 1988/3397 cut-off events. For 122572/122572 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21261 event pairs, 446 based on Foata normal form. 2/3394 useless extension candidates. Maximal degree in co-relation 19897. Up to 2987 conditions per place. [2024-06-27 19:25:50,373 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 59 changer transitions 0/247 dead transitions. [2024-06-27 19:25:50,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 247 transitions, 3199 flow [2024-06-27 19:25:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:25:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:25:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:25:50,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-27 19:25:50,375 INFO L175 Difference]: Start difference. First operand has 204 places, 226 transitions, 2510 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:25:50,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 247 transitions, 3199 flow [2024-06-27 19:25:50,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 247 transitions, 3072 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:50,661 INFO L231 Difference]: Finished difference. Result has 210 places, 230 transitions, 2581 flow [2024-06-27 19:25:50,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2581, PETRI_PLACES=210, PETRI_TRANSITIONS=230} [2024-06-27 19:25:50,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-27 19:25:50,661 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 230 transitions, 2581 flow [2024-06-27 19:25:50,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:50,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:50,662 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 19:25:50,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:25:50,662 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:50,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:50,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2128791118, now seen corresponding path program 4 times [2024-06-27 19:25:50,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:50,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296630040] [2024-06-27 19:25:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:50,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:50,747 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 19:25:50,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:50,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296630040] [2024-06-27 19:25:50,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296630040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:50,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:50,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:50,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336484747] [2024-06-27 19:25:50,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:50,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:50,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:50,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:50,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:50,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:50,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 230 transitions, 2581 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:50,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:50,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:50,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:51,192 INFO L124 PetriNetUnfolderBase]: 2000/3419 cut-off events. [2024-06-27 19:25:51,192 INFO L125 PetriNetUnfolderBase]: For 127111/127111 co-relation queries the response was YES. [2024-06-27 19:25:51,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20310 conditions, 3419 events. 2000/3419 cut-off events. For 127111/127111 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 21399 event pairs, 446 based on Foata normal form. 2/3416 useless extension candidates. Maximal degree in co-relation 20211. Up to 2929 conditions per place. [2024-06-27 19:25:51,225 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 173 selfloop transitions, 72 changer transitions 0/253 dead transitions. [2024-06-27 19:25:51,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 253 transitions, 3337 flow [2024-06-27 19:25:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:25:51,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:25:51,226 INFO L175 Difference]: Start difference. First operand has 210 places, 230 transitions, 2581 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:25:51,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 253 transitions, 3337 flow [2024-06-27 19:25:51,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 253 transitions, 3185 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 19:25:51,546 INFO L231 Difference]: Finished difference. Result has 210 places, 235 transitions, 2729 flow [2024-06-27 19:25:51,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2729, PETRI_PLACES=210, PETRI_TRANSITIONS=235} [2024-06-27 19:25:51,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-27 19:25:51,547 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 235 transitions, 2729 flow [2024-06-27 19:25:51,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:51,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:51,547 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 19:25:51,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:25:51,547 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:51,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:51,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2128785538, now seen corresponding path program 5 times [2024-06-27 19:25:51,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:51,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252525850] [2024-06-27 19:25:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:51,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:51,612 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 19:25:51,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:51,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252525850] [2024-06-27 19:25:51,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252525850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:51,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:51,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:51,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996952909] [2024-06-27 19:25:51,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:51,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:51,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:51,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:51,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:51,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 235 transitions, 2729 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:51,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:51,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:51,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:52,084 INFO L124 PetriNetUnfolderBase]: 2010/3437 cut-off events. [2024-06-27 19:25:52,084 INFO L125 PetriNetUnfolderBase]: For 133204/133204 co-relation queries the response was YES. [2024-06-27 19:25:52,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20777 conditions, 3437 events. 2010/3437 cut-off events. For 133204/133204 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21611 event pairs, 446 based on Foata normal form. 2/3434 useless extension candidates. Maximal degree in co-relation 20676. Up to 2939 conditions per place. [2024-06-27 19:25:52,115 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 166 selfloop transitions, 85 changer transitions 0/259 dead transitions. [2024-06-27 19:25:52,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 259 transitions, 3488 flow [2024-06-27 19:25:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:25:52,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:25:52,116 INFO L175 Difference]: Start difference. First operand has 210 places, 235 transitions, 2729 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:25:52,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 259 transitions, 3488 flow [2024-06-27 19:25:52,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 259 transitions, 3270 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:52,429 INFO L231 Difference]: Finished difference. Result has 214 places, 239 transitions, 2780 flow [2024-06-27 19:25:52,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2529, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2780, PETRI_PLACES=214, PETRI_TRANSITIONS=239} [2024-06-27 19:25:52,429 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-27 19:25:52,429 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 239 transitions, 2780 flow [2024-06-27 19:25:52,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:52,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:52,430 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 19:25:52,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:25:52,430 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:52,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:52,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2121433888, now seen corresponding path program 6 times [2024-06-27 19:25:52,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:52,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677911493] [2024-06-27 19:25:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:52,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:52,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:52,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677911493] [2024-06-27 19:25:52,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677911493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:52,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:52,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:52,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608922582] [2024-06-27 19:25:52,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:52,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:52,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:52,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:52,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:52,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:52,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 239 transitions, 2780 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:52,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:52,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:52,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:53,013 INFO L124 PetriNetUnfolderBase]: 2012/3443 cut-off events. [2024-06-27 19:25:53,013 INFO L125 PetriNetUnfolderBase]: For 131828/131831 co-relation queries the response was YES. [2024-06-27 19:25:53,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20654 conditions, 3443 events. 2012/3443 cut-off events. For 131828/131831 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21666 event pairs, 465 based on Foata normal form. 4/3440 useless extension candidates. Maximal degree in co-relation 20552. Up to 2943 conditions per place. [2024-06-27 19:25:53,044 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 89 changer transitions 0/259 dead transitions. [2024-06-27 19:25:53,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 259 transitions, 3499 flow [2024-06-27 19:25:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:25:53,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-27 19:25:53,047 INFO L175 Difference]: Start difference. First operand has 214 places, 239 transitions, 2780 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:25:53,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 259 transitions, 3499 flow [2024-06-27 19:25:53,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 259 transitions, 3277 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:53,407 INFO L231 Difference]: Finished difference. Result has 216 places, 243 transitions, 2822 flow [2024-06-27 19:25:53,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2568, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2822, PETRI_PLACES=216, PETRI_TRANSITIONS=243} [2024-06-27 19:25:53,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-27 19:25:53,408 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 243 transitions, 2822 flow [2024-06-27 19:25:53,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:53,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:53,408 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 19:25:53,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:25:53,409 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:53,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:53,409 INFO L85 PathProgramCache]: Analyzing trace with hash 741427622, now seen corresponding path program 1 times [2024-06-27 19:25:53,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:53,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039509573] [2024-06-27 19:25:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:53,483 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 19:25:53,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:53,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039509573] [2024-06-27 19:25:53,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039509573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:53,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:53,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:53,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723162482] [2024-06-27 19:25:53,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:53,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:53,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:53,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:53,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:53,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 243 transitions, 2822 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:53,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:53,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:53,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:53,970 INFO L124 PetriNetUnfolderBase]: 2041/3487 cut-off events. [2024-06-27 19:25:53,970 INFO L125 PetriNetUnfolderBase]: For 134171/134174 co-relation queries the response was YES. [2024-06-27 19:25:53,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21140 conditions, 3487 events. 2041/3487 cut-off events. For 134171/134174 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21880 event pairs, 467 based on Foata normal form. 1/3478 useless extension candidates. Maximal degree in co-relation 21037. Up to 2944 conditions per place. [2024-06-27 19:25:54,004 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 101 changer transitions 0/278 dead transitions. [2024-06-27 19:25:54,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 278 transitions, 3815 flow [2024-06-27 19:25:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:25:54,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:25:54,006 INFO L175 Difference]: Start difference. First operand has 216 places, 243 transitions, 2822 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:25:54,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 278 transitions, 3815 flow [2024-06-27 19:25:54,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 278 transitions, 3575 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:54,358 INFO L231 Difference]: Finished difference. Result has 217 places, 253 transitions, 2973 flow [2024-06-27 19:25:54,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2596, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2973, PETRI_PLACES=217, PETRI_TRANSITIONS=253} [2024-06-27 19:25:54,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-27 19:25:54,358 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 253 transitions, 2973 flow [2024-06-27 19:25:54,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:54,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:54,358 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 19:25:54,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:25:54,358 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:54,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1748574422, now seen corresponding path program 2 times [2024-06-27 19:25:54,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:54,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094484692] [2024-06-27 19:25:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:54,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:54,429 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 19:25:54,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:54,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094484692] [2024-06-27 19:25:54,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094484692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:54,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:54,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:54,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202959633] [2024-06-27 19:25:54,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:54,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:54,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:54,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:54,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:54,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:54,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 253 transitions, 2973 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:54,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:54,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:54,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:54,932 INFO L124 PetriNetUnfolderBase]: 2038/3487 cut-off events. [2024-06-27 19:25:54,932 INFO L125 PetriNetUnfolderBase]: For 137470/137473 co-relation queries the response was YES. [2024-06-27 19:25:54,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21110 conditions, 3487 events. 2038/3487 cut-off events. For 137470/137473 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21941 event pairs, 448 based on Foata normal form. 3/3484 useless extension candidates. Maximal degree in co-relation 21006. Up to 3086 conditions per place. [2024-06-27 19:25:54,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 53 changer transitions 0/273 dead transitions. [2024-06-27 19:25:54,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 273 transitions, 3553 flow [2024-06-27 19:25:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:25:54,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:25:54,967 INFO L175 Difference]: Start difference. First operand has 217 places, 253 transitions, 2973 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:25:54,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 273 transitions, 3553 flow [2024-06-27 19:25:55,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 273 transitions, 3366 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:55,326 INFO L231 Difference]: Finished difference. Result has 221 places, 253 transitions, 2898 flow [2024-06-27 19:25:55,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2898, PETRI_PLACES=221, PETRI_TRANSITIONS=253} [2024-06-27 19:25:55,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-27 19:25:55,327 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 253 transitions, 2898 flow [2024-06-27 19:25:55,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:55,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:55,327 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 19:25:55,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:25:55,327 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:55,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:55,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1571442902, now seen corresponding path program 3 times [2024-06-27 19:25:55,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:55,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483634642] [2024-06-27 19:25:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:55,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:55,405 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 19:25:55,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:55,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483634642] [2024-06-27 19:25:55,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483634642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:55,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:55,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:55,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115892805] [2024-06-27 19:25:55,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:55,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:55,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:55,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:55,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:55,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:55,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 253 transitions, 2898 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:55,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:55,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:55,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:55,869 INFO L124 PetriNetUnfolderBase]: 2066/3534 cut-off events. [2024-06-27 19:25:55,869 INFO L125 PetriNetUnfolderBase]: For 143794/143797 co-relation queries the response was YES. [2024-06-27 19:25:55,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21413 conditions, 3534 events. 2066/3534 cut-off events. For 143794/143797 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22253 event pairs, 448 based on Foata normal form. 3/3531 useless extension candidates. Maximal degree in co-relation 21308. Up to 3107 conditions per place. [2024-06-27 19:25:55,903 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 68 changer transitions 0/287 dead transitions. [2024-06-27 19:25:55,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 287 transitions, 3854 flow [2024-06-27 19:25:55,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:25:55,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-27 19:25:55,904 INFO L175 Difference]: Start difference. First operand has 221 places, 253 transitions, 2898 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:25:55,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 287 transitions, 3854 flow [2024-06-27 19:25:56,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 287 transitions, 3706 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:56,353 INFO L231 Difference]: Finished difference. Result has 227 places, 268 transitions, 3170 flow [2024-06-27 19:25:56,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2770, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3170, PETRI_PLACES=227, PETRI_TRANSITIONS=268} [2024-06-27 19:25:56,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-27 19:25:56,353 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 268 transitions, 3170 flow [2024-06-27 19:25:56,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:56,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:56,353 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 19:25:56,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:25:56,354 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:56,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:56,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1653841288, now seen corresponding path program 4 times [2024-06-27 19:25:56,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:56,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139419208] [2024-06-27 19:25:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:56,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:56,418 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 19:25:56,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:56,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139419208] [2024-06-27 19:25:56,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139419208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:56,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:56,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:56,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894600323] [2024-06-27 19:25:56,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:56,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:56,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:56,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:56,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:56,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 268 transitions, 3170 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:56,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:56,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:56,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:56,935 INFO L124 PetriNetUnfolderBase]: 2103/3590 cut-off events. [2024-06-27 19:25:56,936 INFO L125 PetriNetUnfolderBase]: For 155097/155097 co-relation queries the response was YES. [2024-06-27 19:25:56,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22205 conditions, 3590 events. 2103/3590 cut-off events. For 155097/155097 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22656 event pairs, 446 based on Foata normal form. 1/3586 useless extension candidates. Maximal degree in co-relation 22097. Up to 2992 conditions per place. [2024-06-27 19:25:56,971 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 177 selfloop transitions, 117 changer transitions 0/302 dead transitions. [2024-06-27 19:25:56,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 302 transitions, 4328 flow [2024-06-27 19:25:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:25:56,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:25:56,972 INFO L175 Difference]: Start difference. First operand has 227 places, 268 transitions, 3170 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:25:56,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 302 transitions, 4328 flow [2024-06-27 19:25:57,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 302 transitions, 4206 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:57,360 INFO L231 Difference]: Finished difference. Result has 232 places, 279 transitions, 3472 flow [2024-06-27 19:25:57,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3472, PETRI_PLACES=232, PETRI_TRANSITIONS=279} [2024-06-27 19:25:57,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 19:25:57,361 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 279 transitions, 3472 flow [2024-06-27 19:25:57,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:57,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:57,361 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 19:25:57,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:25:57,362 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:57,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:57,362 INFO L85 PathProgramCache]: Analyzing trace with hash -383159282, now seen corresponding path program 5 times [2024-06-27 19:25:57,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:57,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233308720] [2024-06-27 19:25:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:57,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:57,429 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 19:25:57,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:57,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233308720] [2024-06-27 19:25:57,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233308720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:57,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:57,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:57,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733579802] [2024-06-27 19:25:57,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:57,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:57,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:57,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:57,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:57,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:57,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 279 transitions, 3472 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:57,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:57,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:57,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:57,966 INFO L124 PetriNetUnfolderBase]: 2100/3586 cut-off events. [2024-06-27 19:25:57,966 INFO L125 PetriNetUnfolderBase]: For 159298/159298 co-relation queries the response was YES. [2024-06-27 19:25:57,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22408 conditions, 3586 events. 2100/3586 cut-off events. For 159298/159298 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22625 event pairs, 446 based on Foata normal form. 1/3582 useless extension candidates. Maximal degree in co-relation 22299. Up to 3161 conditions per place. [2024-06-27 19:25:58,004 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 231 selfloop transitions, 57 changer transitions 0/296 dead transitions. [2024-06-27 19:25:58,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 296 transitions, 4090 flow [2024-06-27 19:25:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:25:58,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:25:58,006 INFO L175 Difference]: Start difference. First operand has 232 places, 279 transitions, 3472 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:25:58,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 296 transitions, 4090 flow [2024-06-27 19:25:58,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 296 transitions, 3796 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:58,462 INFO L231 Difference]: Finished difference. Result has 235 places, 279 transitions, 3298 flow [2024-06-27 19:25:58,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3298, PETRI_PLACES=235, PETRI_TRANSITIONS=279} [2024-06-27 19:25:58,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 19:25:58,463 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 279 transitions, 3298 flow [2024-06-27 19:25:58,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:58,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:58,463 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 19:25:58,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:25:58,463 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:58,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash -466733658, now seen corresponding path program 6 times [2024-06-27 19:25:58,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:58,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468138896] [2024-06-27 19:25:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:58,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:58,533 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 19:25:58,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:58,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468138896] [2024-06-27 19:25:58,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468138896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:58,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:58,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:58,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663813137] [2024-06-27 19:25:58,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:58,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:58,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:58,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:58,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:58,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:58,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 279 transitions, 3298 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:58,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:58,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:58,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:59,027 INFO L124 PetriNetUnfolderBase]: 2105/3595 cut-off events. [2024-06-27 19:25:59,027 INFO L125 PetriNetUnfolderBase]: For 163218/163218 co-relation queries the response was YES. [2024-06-27 19:25:59,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22276 conditions, 3595 events. 2105/3595 cut-off events. For 163218/163218 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22723 event pairs, 446 based on Foata normal form. 1/3591 useless extension candidates. Maximal degree in co-relation 22166. Up to 2994 conditions per place. [2024-06-27 19:25:59,064 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 117 changer transitions 0/304 dead transitions. [2024-06-27 19:25:59,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 304 transitions, 4217 flow [2024-06-27 19:25:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:25:59,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:25:59,065 INFO L175 Difference]: Start difference. First operand has 235 places, 279 transitions, 3298 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:25:59,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 304 transitions, 4217 flow [2024-06-27 19:25:59,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 304 transitions, 4101 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:59,503 INFO L231 Difference]: Finished difference. Result has 237 places, 282 transitions, 3467 flow [2024-06-27 19:25:59,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3182, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3467, PETRI_PLACES=237, PETRI_TRANSITIONS=282} [2024-06-27 19:25:59,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-27 19:25:59,504 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 282 transitions, 3467 flow [2024-06-27 19:25:59,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:59,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:59,504 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 19:25:59,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:25:59,504 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:59,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash -454353498, now seen corresponding path program 7 times [2024-06-27 19:25:59,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:59,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724021020] [2024-06-27 19:25:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:59,570 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 19:25:59,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:59,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724021020] [2024-06-27 19:25:59,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724021020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:59,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:59,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:59,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279906501] [2024-06-27 19:25:59,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:59,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:59,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:59,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:59,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:59,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:59,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 282 transitions, 3467 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:59,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:59,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:59,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:00,035 INFO L124 PetriNetUnfolderBase]: 2097/3583 cut-off events. [2024-06-27 19:26:00,035 INFO L125 PetriNetUnfolderBase]: For 167342/167342 co-relation queries the response was YES. [2024-06-27 19:26:00,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22419 conditions, 3583 events. 2097/3583 cut-off events. For 167342/167342 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22655 event pairs, 446 based on Foata normal form. 2/3580 useless extension candidates. Maximal degree in co-relation 22308. Up to 2986 conditions per place. [2024-06-27 19:26:00,072 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 183 selfloop transitions, 109 changer transitions 0/300 dead transitions. [2024-06-27 19:26:00,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 300 transitions, 4211 flow [2024-06-27 19:26:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:26:00,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:26:00,073 INFO L175 Difference]: Start difference. First operand has 237 places, 282 transitions, 3467 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:26:00,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 300 transitions, 4211 flow [2024-06-27 19:26:00,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 300 transitions, 3906 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:00,587 INFO L231 Difference]: Finished difference. Result has 239 places, 282 transitions, 3388 flow [2024-06-27 19:26:00,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3388, PETRI_PLACES=239, PETRI_TRANSITIONS=282} [2024-06-27 19:26:00,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-27 19:26:00,588 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 282 transitions, 3388 flow [2024-06-27 19:26:00,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:00,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:00,588 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 19:26:00,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:26:00,589 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:00,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:00,589 INFO L85 PathProgramCache]: Analyzing trace with hash -339062328, now seen corresponding path program 8 times [2024-06-27 19:26:00,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:00,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968275890] [2024-06-27 19:26:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:00,665 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 19:26:00,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:00,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968275890] [2024-06-27 19:26:00,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968275890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:00,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:00,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:00,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663800172] [2024-06-27 19:26:00,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:00,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:00,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:00,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:00,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:00,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:00,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 282 transitions, 3388 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:00,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:00,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:00,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:01,178 INFO L124 PetriNetUnfolderBase]: 2091/3575 cut-off events. [2024-06-27 19:26:01,178 INFO L125 PetriNetUnfolderBase]: For 168708/168708 co-relation queries the response was YES. [2024-06-27 19:26:01,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22238 conditions, 3575 events. 2091/3575 cut-off events. For 168708/168708 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22613 event pairs, 446 based on Foata normal form. 2/3572 useless extension candidates. Maximal degree in co-relation 22126. Up to 3108 conditions per place. [2024-06-27 19:26:01,214 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 68 changer transitions 0/297 dead transitions. [2024-06-27 19:26:01,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 297 transitions, 4120 flow [2024-06-27 19:26:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:26:01,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-27 19:26:01,215 INFO L175 Difference]: Start difference. First operand has 239 places, 282 transitions, 3388 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:26:01,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 297 transitions, 4120 flow [2024-06-27 19:26:01,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 297 transitions, 3888 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:01,694 INFO L231 Difference]: Finished difference. Result has 240 places, 282 transitions, 3301 flow [2024-06-27 19:26:01,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3156, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3301, PETRI_PLACES=240, PETRI_TRANSITIONS=282} [2024-06-27 19:26:01,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 19:26:01,694 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 282 transitions, 3301 flow [2024-06-27 19:26:01,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:01,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:01,695 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 19:26:01,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:26:01,695 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:01,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:01,696 INFO L85 PathProgramCache]: Analyzing trace with hash -339329238, now seen corresponding path program 9 times [2024-06-27 19:26:01,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:01,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235263602] [2024-06-27 19:26:01,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:01,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:01,771 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 19:26:01,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:01,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235263602] [2024-06-27 19:26:01,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235263602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:01,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:01,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:01,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333544684] [2024-06-27 19:26:01,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:01,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:01,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:01,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:01,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 282 transitions, 3301 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:01,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:01,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:01,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:02,356 INFO L124 PetriNetUnfolderBase]: 2083/3563 cut-off events. [2024-06-27 19:26:02,356 INFO L125 PetriNetUnfolderBase]: For 169771/169771 co-relation queries the response was YES. [2024-06-27 19:26:02,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21967 conditions, 3563 events. 2083/3563 cut-off events. For 169771/169771 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22521 event pairs, 446 based on Foata normal form. 2/3560 useless extension candidates. Maximal degree in co-relation 21854. Up to 3100 conditions per place. [2024-06-27 19:26:02,395 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 218 selfloop transitions, 72 changer transitions 0/298 dead transitions. [2024-06-27 19:26:02,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 298 transitions, 3919 flow [2024-06-27 19:26:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 19:26:02,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-27 19:26:02,396 INFO L175 Difference]: Start difference. First operand has 240 places, 282 transitions, 3301 flow. Second operand 9 states and 208 transitions. [2024-06-27 19:26:02,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 298 transitions, 3919 flow [2024-06-27 19:26:02,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 298 transitions, 3757 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:02,897 INFO L231 Difference]: Finished difference. Result has 245 places, 282 transitions, 3290 flow [2024-06-27 19:26:02,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3290, PETRI_PLACES=245, PETRI_TRANSITIONS=282} [2024-06-27 19:26:02,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-27 19:26:02,898 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 282 transitions, 3290 flow [2024-06-27 19:26:02,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:02,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:02,898 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 19:26:02,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:26:02,898 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:02,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:02,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1779111698, now seen corresponding path program 10 times [2024-06-27 19:26:02,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:02,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659048672] [2024-06-27 19:26:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:02,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:02,975 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 19:26:02,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:02,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659048672] [2024-06-27 19:26:02,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659048672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:02,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:02,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:02,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745786335] [2024-06-27 19:26:02,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:02,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:02,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:02,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:02,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:03,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:03,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 282 transitions, 3290 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:03,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:03,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:03,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:03,531 INFO L124 PetriNetUnfolderBase]: 2077/3558 cut-off events. [2024-06-27 19:26:03,531 INFO L125 PetriNetUnfolderBase]: For 171307/171310 co-relation queries the response was YES. [2024-06-27 19:26:03,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21831 conditions, 3558 events. 2077/3558 cut-off events. For 171307/171310 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22501 event pairs, 448 based on Foata normal form. 4/3556 useless extension candidates. Maximal degree in co-relation 21717. Up to 2998 conditions per place. [2024-06-27 19:26:03,567 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 182 selfloop transitions, 123 changer transitions 0/313 dead transitions. [2024-06-27 19:26:03,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 313 transitions, 4100 flow [2024-06-27 19:26:03,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 19:26:03,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:26:03,568 INFO L175 Difference]: Start difference. First operand has 245 places, 282 transitions, 3290 flow. Second operand 8 states and 208 transitions. [2024-06-27 19:26:03,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 313 transitions, 4100 flow [2024-06-27 19:26:04,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 313 transitions, 3864 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-27 19:26:04,153 INFO L231 Difference]: Finished difference. Result has 243 places, 282 transitions, 3319 flow [2024-06-27 19:26:04,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3054, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3319, PETRI_PLACES=243, PETRI_TRANSITIONS=282} [2024-06-27 19:26:04,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-27 19:26:04,153 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 282 transitions, 3319 flow [2024-06-27 19:26:04,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:04,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:04,154 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 19:26:04,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:26:04,154 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:04,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1931509590, now seen corresponding path program 11 times [2024-06-27 19:26:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:04,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20513129] [2024-06-27 19:26:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:04,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:04,216 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 19:26:04,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:04,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20513129] [2024-06-27 19:26:04,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20513129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:04,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:04,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:04,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367720664] [2024-06-27 19:26:04,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:04,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:04,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:04,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:04,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:04,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:04,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 282 transitions, 3319 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:04,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:04,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:04,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:04,755 INFO L124 PetriNetUnfolderBase]: 2071/3547 cut-off events. [2024-06-27 19:26:04,755 INFO L125 PetriNetUnfolderBase]: For 172112/172112 co-relation queries the response was YES. [2024-06-27 19:26:04,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21834 conditions, 3547 events. 2071/3547 cut-off events. For 172112/172112 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22443 event pairs, 446 based on Foata normal form. 2/3544 useless extension candidates. Maximal degree in co-relation 21720. Up to 2993 conditions per place. [2024-06-27 19:26:04,788 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 103 changer transitions 0/302 dead transitions. [2024-06-27 19:26:04,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 302 transitions, 4081 flow [2024-06-27 19:26:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:26:04,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:26:04,789 INFO L175 Difference]: Start difference. First operand has 243 places, 282 transitions, 3319 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:26:04,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 302 transitions, 4081 flow [2024-06-27 19:26:05,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 302 transitions, 3764 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 19:26:05,338 INFO L231 Difference]: Finished difference. Result has 240 places, 282 transitions, 3235 flow [2024-06-27 19:26:05,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3235, PETRI_PLACES=240, PETRI_TRANSITIONS=282} [2024-06-27 19:26:05,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 19:26:05,339 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 282 transitions, 3235 flow [2024-06-27 19:26:05,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:05,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:05,339 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 19:26:05,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:26:05,340 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:05,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:05,340 INFO L85 PathProgramCache]: Analyzing trace with hash -163473132, now seen corresponding path program 12 times [2024-06-27 19:26:05,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:05,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291373750] [2024-06-27 19:26:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:05,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:05,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:05,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291373750] [2024-06-27 19:26:05,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291373750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:05,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:05,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:05,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899586862] [2024-06-27 19:26:05,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:05,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:05,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:05,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:05,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:05,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:05,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 282 transitions, 3235 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:05,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:05,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:05,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:05,902 INFO L124 PetriNetUnfolderBase]: 2063/3535 cut-off events. [2024-06-27 19:26:05,902 INFO L125 PetriNetUnfolderBase]: For 158221/158221 co-relation queries the response was YES. [2024-06-27 19:26:05,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21387 conditions, 3535 events. 2063/3535 cut-off events. For 158221/158221 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22363 event pairs, 446 based on Foata normal form. 2/3532 useless extension candidates. Maximal degree in co-relation 21274. Up to 2985 conditions per place. [2024-06-27 19:26:05,937 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 115 changer transitions 0/309 dead transitions. [2024-06-27 19:26:05,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 309 transitions, 3905 flow [2024-06-27 19:26:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:05,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:26:05,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:26:05,938 INFO L175 Difference]: Start difference. First operand has 240 places, 282 transitions, 3235 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:26:05,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 309 transitions, 3905 flow [2024-06-27 19:26:06,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 309 transitions, 3613 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 19:26:06,394 INFO L231 Difference]: Finished difference. Result has 240 places, 282 transitions, 3193 flow [2024-06-27 19:26:06,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3193, PETRI_PLACES=240, PETRI_TRANSITIONS=282} [2024-06-27 19:26:06,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 19:26:06,394 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 282 transitions, 3193 flow [2024-06-27 19:26:06,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:06,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:06,395 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 19:26:06,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:26:06,395 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:06,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:06,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1924322736, now seen corresponding path program 1 times [2024-06-27 19:26:06,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:06,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218055215] [2024-06-27 19:26:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:06,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:06,458 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 19:26:06,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:06,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218055215] [2024-06-27 19:26:06,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218055215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:06,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:06,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:06,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611786110] [2024-06-27 19:26:06,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:06,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:06,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:06,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:06,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:26:06,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 282 transitions, 3193 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 19:26:06,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:06,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:26:06,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:06,932 INFO L124 PetriNetUnfolderBase]: 1982/3442 cut-off events. [2024-06-27 19:26:06,932 INFO L125 PetriNetUnfolderBase]: For 163155/163155 co-relation queries the response was YES. [2024-06-27 19:26:06,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20844 conditions, 3442 events. 1982/3442 cut-off events. For 163155/163155 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21968 event pairs, 329 based on Foata normal form. 7/3415 useless extension candidates. Maximal degree in co-relation 20732. Up to 2845 conditions per place. [2024-06-27 19:26:06,968 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 229 selfloop transitions, 27 changer transitions 0/305 dead transitions. [2024-06-27 19:26:06,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 305 transitions, 3789 flow [2024-06-27 19:26:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:06,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-27 19:26:06,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6731707317073171 [2024-06-27 19:26:06,969 INFO L175 Difference]: Start difference. First operand has 240 places, 282 transitions, 3193 flow. Second operand 5 states and 138 transitions. [2024-06-27 19:26:06,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 305 transitions, 3789 flow [2024-06-27 19:26:07,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 305 transitions, 3540 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 19:26:07,458 INFO L231 Difference]: Finished difference. Result has 235 places, 283 transitions, 3020 flow [2024-06-27 19:26:07,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3020, PETRI_PLACES=235, PETRI_TRANSITIONS=283} [2024-06-27 19:26:07,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 19:26:07,459 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 283 transitions, 3020 flow [2024-06-27 19:26:07,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 19:26:07,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:07,459 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 19:26:07,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:26:07,459 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:07,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:07,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1346158912, now seen corresponding path program 2 times [2024-06-27 19:26:07,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:07,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361435594] [2024-06-27 19:26:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:07,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:07,519 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 19:26:07,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:07,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361435594] [2024-06-27 19:26:07,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361435594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:07,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:07,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:07,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809019364] [2024-06-27 19:26:07,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:07,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:07,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:07,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:26:07,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 283 transitions, 3020 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 19:26:07,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:07,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:26:07,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:07,979 INFO L124 PetriNetUnfolderBase]: 1984/3431 cut-off events. [2024-06-27 19:26:07,979 INFO L125 PetriNetUnfolderBase]: For 146793/146807 co-relation queries the response was YES. [2024-06-27 19:26:08,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20202 conditions, 3431 events. 1984/3431 cut-off events. For 146793/146807 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21951 event pairs, 343 based on Foata normal form. 20/3412 useless extension candidates. Maximal degree in co-relation 20092. Up to 2748 conditions per place. [2024-06-27 19:26:08,017 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 231 selfloop transitions, 24 changer transitions 0/304 dead transitions. [2024-06-27 19:26:08,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 304 transitions, 3732 flow [2024-06-27 19:26:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-27 19:26:08,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-06-27 19:26:08,017 INFO L175 Difference]: Start difference. First operand has 235 places, 283 transitions, 3020 flow. Second operand 5 states and 132 transitions. [2024-06-27 19:26:08,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 304 transitions, 3732 flow [2024-06-27 19:26:08,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 304 transitions, 3682 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:08,536 INFO L231 Difference]: Finished difference. Result has 237 places, 284 transitions, 3034 flow [2024-06-27 19:26:08,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2970, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3034, PETRI_PLACES=237, PETRI_TRANSITIONS=284} [2024-06-27 19:26:08,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-27 19:26:08,537 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 284 transitions, 3034 flow [2024-06-27 19:26:08,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 19:26:08,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:08,537 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 19:26:08,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:26:08,537 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:08,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:08,537 INFO L85 PathProgramCache]: Analyzing trace with hash -457200538, now seen corresponding path program 1 times [2024-06-27 19:26:08,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:08,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883677425] [2024-06-27 19:26:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:08,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:08,621 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 19:26:08,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:08,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883677425] [2024-06-27 19:26:08,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883677425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:08,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:08,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:08,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130752599] [2024-06-27 19:26:08,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:08,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:08,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:08,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:08,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 284 transitions, 3034 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:08,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:08,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:08,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:09,147 INFO L124 PetriNetUnfolderBase]: 2101/3626 cut-off events. [2024-06-27 19:26:09,147 INFO L125 PetriNetUnfolderBase]: For 143222/143222 co-relation queries the response was YES. [2024-06-27 19:26:09,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21184 conditions, 3626 events. 2101/3626 cut-off events. For 143222/143222 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23112 event pairs, 409 based on Foata normal form. 2/3626 useless extension candidates. Maximal degree in co-relation 21073. Up to 3224 conditions per place. [2024-06-27 19:26:09,184 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 272 selfloop transitions, 31 changer transitions 0/311 dead transitions. [2024-06-27 19:26:09,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 311 transitions, 3920 flow [2024-06-27 19:26:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:26:09,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:26:09,185 INFO L175 Difference]: Start difference. First operand has 237 places, 284 transitions, 3034 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:26:09,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 311 transitions, 3920 flow [2024-06-27 19:26:09,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 311 transitions, 3879 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:09,602 INFO L231 Difference]: Finished difference. Result has 242 places, 288 transitions, 3172 flow [2024-06-27 19:26:09,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3172, PETRI_PLACES=242, PETRI_TRANSITIONS=288} [2024-06-27 19:26:09,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-27 19:26:09,603 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 288 transitions, 3172 flow [2024-06-27 19:26:09,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:09,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:09,603 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 19:26:09,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:26:09,603 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:09,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:09,603 INFO L85 PathProgramCache]: Analyzing trace with hash -117185172, now seen corresponding path program 2 times [2024-06-27 19:26:09,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:09,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597118524] [2024-06-27 19:26:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:09,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:09,682 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 19:26:09,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:09,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597118524] [2024-06-27 19:26:09,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597118524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:09,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:09,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:09,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102953912] [2024-06-27 19:26:09,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:09,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:09,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:09,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:09,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:09,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 288 transitions, 3172 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:09,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:09,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:09,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:10,163 INFO L124 PetriNetUnfolderBase]: 2109/3633 cut-off events. [2024-06-27 19:26:10,163 INFO L125 PetriNetUnfolderBase]: For 148636/148636 co-relation queries the response was YES. [2024-06-27 19:26:10,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21360 conditions, 3633 events. 2109/3633 cut-off events. For 148636/148636 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23155 event pairs, 440 based on Foata normal form. 2/3633 useless extension candidates. Maximal degree in co-relation 21248. Up to 3269 conditions per place. [2024-06-27 19:26:10,200 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 272 selfloop transitions, 28 changer transitions 0/308 dead transitions. [2024-06-27 19:26:10,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 308 transitions, 3874 flow [2024-06-27 19:26:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:10,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:26:10,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-27 19:26:10,201 INFO L175 Difference]: Start difference. First operand has 242 places, 288 transitions, 3172 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:26:10,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 308 transitions, 3874 flow [2024-06-27 19:26:10,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 308 transitions, 3758 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:10,629 INFO L231 Difference]: Finished difference. Result has 246 places, 290 transitions, 3179 flow [2024-06-27 19:26:10,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3074, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3179, PETRI_PLACES=246, PETRI_TRANSITIONS=290} [2024-06-27 19:26:10,630 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-27 19:26:10,630 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 290 transitions, 3179 flow [2024-06-27 19:26:10,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:10,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:10,631 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 19:26:10,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:26:10,631 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:10,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:10,631 INFO L85 PathProgramCache]: Analyzing trace with hash 902508, now seen corresponding path program 3 times [2024-06-27 19:26:10,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:10,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285153725] [2024-06-27 19:26:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:10,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:10,709 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 19:26:10,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:10,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285153725] [2024-06-27 19:26:10,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285153725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:10,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:10,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:10,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541499381] [2024-06-27 19:26:10,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:10,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:10,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:10,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:10,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:10,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:10,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 290 transitions, 3179 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:10,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:10,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:10,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:11,230 INFO L124 PetriNetUnfolderBase]: 2117/3645 cut-off events. [2024-06-27 19:26:11,230 INFO L125 PetriNetUnfolderBase]: For 153166/153166 co-relation queries the response was YES. [2024-06-27 19:26:11,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21434 conditions, 3645 events. 2117/3645 cut-off events. For 153166/153166 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23196 event pairs, 440 based on Foata normal form. 2/3645 useless extension candidates. Maximal degree in co-relation 21320. Up to 3296 conditions per place. [2024-06-27 19:26:11,267 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 279 selfloop transitions, 20 changer transitions 0/307 dead transitions. [2024-06-27 19:26:11,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 307 transitions, 3857 flow [2024-06-27 19:26:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 19:26:11,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-27 19:26:11,269 INFO L175 Difference]: Start difference. First operand has 246 places, 290 transitions, 3179 flow. Second operand 7 states and 159 transitions. [2024-06-27 19:26:11,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 307 transitions, 3857 flow [2024-06-27 19:26:11,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 307 transitions, 3772 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:11,690 INFO L231 Difference]: Finished difference. Result has 248 places, 292 transitions, 3187 flow [2024-06-27 19:26:11,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3187, PETRI_PLACES=248, PETRI_TRANSITIONS=292} [2024-06-27 19:26:11,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-27 19:26:11,690 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 292 transitions, 3187 flow [2024-06-27 19:26:11,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:11,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:11,690 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 19:26:11,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:26:11,690 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:11,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash -338867710, now seen corresponding path program 1 times [2024-06-27 19:26:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:11,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072862330] [2024-06-27 19:26:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:11,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:11,764 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 19:26:11,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:11,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072862330] [2024-06-27 19:26:11,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072862330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:11,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:11,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:11,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999505727] [2024-06-27 19:26:11,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:11,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:11,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:11,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:11,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:11,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:11,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 292 transitions, 3187 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:11,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:11,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:11,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:12,287 INFO L124 PetriNetUnfolderBase]: 2133/3664 cut-off events. [2024-06-27 19:26:12,287 INFO L125 PetriNetUnfolderBase]: For 161867/161867 co-relation queries the response was YES. [2024-06-27 19:26:12,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21625 conditions, 3664 events. 2133/3664 cut-off events. For 161867/161867 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23293 event pairs, 452 based on Foata normal form. 4/3663 useless extension candidates. Maximal degree in co-relation 21510. Up to 3212 conditions per place. [2024-06-27 19:26:12,323 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 247 selfloop transitions, 55 changer transitions 0/310 dead transitions. [2024-06-27 19:26:12,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 310 transitions, 3887 flow [2024-06-27 19:26:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:26:12,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-27 19:26:12,324 INFO L175 Difference]: Start difference. First operand has 248 places, 292 transitions, 3187 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:26:12,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 310 transitions, 3887 flow [2024-06-27 19:26:12,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 310 transitions, 3814 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:12,823 INFO L231 Difference]: Finished difference. Result has 250 places, 295 transitions, 3296 flow [2024-06-27 19:26:12,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3296, PETRI_PLACES=250, PETRI_TRANSITIONS=295} [2024-06-27 19:26:12,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-27 19:26:12,824 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 295 transitions, 3296 flow [2024-06-27 19:26:12,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:12,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:12,824 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 19:26:12,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:26:12,824 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:12,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:12,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1568018906, now seen corresponding path program 4 times [2024-06-27 19:26:12,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:12,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152679057] [2024-06-27 19:26:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:12,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:12,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152679057] [2024-06-27 19:26:12,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152679057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:12,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:12,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:12,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976111380] [2024-06-27 19:26:12,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:12,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:12,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:12,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:12,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 295 transitions, 3296 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:12,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:12,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:12,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:13,453 INFO L124 PetriNetUnfolderBase]: 2128/3667 cut-off events. [2024-06-27 19:26:13,454 INFO L125 PetriNetUnfolderBase]: For 159578/159578 co-relation queries the response was YES. [2024-06-27 19:26:13,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21709 conditions, 3667 events. 2128/3667 cut-off events. For 159578/159578 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23382 event pairs, 408 based on Foata normal form. 2/3667 useless extension candidates. Maximal degree in co-relation 21593. Up to 3277 conditions per place. [2024-06-27 19:26:13,491 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 278 selfloop transitions, 29 changer transitions 0/315 dead transitions. [2024-06-27 19:26:13,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 315 transitions, 3960 flow [2024-06-27 19:26:13,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:26:13,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-27 19:26:13,492 INFO L175 Difference]: Start difference. First operand has 250 places, 295 transitions, 3296 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:26:13,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 315 transitions, 3960 flow [2024-06-27 19:26:13,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 315 transitions, 3770 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:13,998 INFO L231 Difference]: Finished difference. Result has 251 places, 295 transitions, 3175 flow [2024-06-27 19:26:13,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3175, PETRI_PLACES=251, PETRI_TRANSITIONS=295} [2024-06-27 19:26:13,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-27 19:26:13,998 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 295 transitions, 3175 flow [2024-06-27 19:26:13,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:13,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:13,999 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 19:26:13,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:26:13,999 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:13,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:13,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1339933058, now seen corresponding path program 2 times [2024-06-27 19:26:13,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:13,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213567767] [2024-06-27 19:26:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:13,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:14,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:14,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213567767] [2024-06-27 19:26:14,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213567767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:14,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:14,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824417457] [2024-06-27 19:26:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:14,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:14,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:14,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:14,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:14,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:14,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 295 transitions, 3175 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:14,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:14,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:14,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:14,609 INFO L124 PetriNetUnfolderBase]: 2144/3682 cut-off events. [2024-06-27 19:26:14,610 INFO L125 PetriNetUnfolderBase]: For 168664/168667 co-relation queries the response was YES. [2024-06-27 19:26:14,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21730 conditions, 3682 events. 2144/3682 cut-off events. For 168664/168667 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 23475 event pairs, 472 based on Foata normal form. 6/3681 useless extension candidates. Maximal degree in co-relation 21613. Up to 3229 conditions per place. [2024-06-27 19:26:14,647 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 244 selfloop transitions, 57 changer transitions 0/309 dead transitions. [2024-06-27 19:26:14,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 309 transitions, 3869 flow [2024-06-27 19:26:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:26:14,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-27 19:26:14,648 INFO L175 Difference]: Start difference. First operand has 251 places, 295 transitions, 3175 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:26:14,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 309 transitions, 3869 flow [2024-06-27 19:26:15,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 309 transitions, 3802 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:15,162 INFO L231 Difference]: Finished difference. Result has 252 places, 298 transitions, 3300 flow [2024-06-27 19:26:15,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3300, PETRI_PLACES=252, PETRI_TRANSITIONS=298} [2024-06-27 19:26:15,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-27 19:26:15,163 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 298 transitions, 3300 flow [2024-06-27 19:26:15,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:15,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:15,163 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 19:26:15,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:26:15,163 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:15,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:15,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1567834208, now seen corresponding path program 3 times [2024-06-27 19:26:15,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:15,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594561848] [2024-06-27 19:26:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:15,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:15,239 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 19:26:15,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:15,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594561848] [2024-06-27 19:26:15,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594561848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:15,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:15,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:15,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036413968] [2024-06-27 19:26:15,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:15,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:15,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:15,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:15,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:15,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:15,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 298 transitions, 3300 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:15,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:15,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:15,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:15,758 INFO L124 PetriNetUnfolderBase]: 2160/3705 cut-off events. [2024-06-27 19:26:15,758 INFO L125 PetriNetUnfolderBase]: For 169656/169656 co-relation queries the response was YES. [2024-06-27 19:26:15,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22144 conditions, 3705 events. 2160/3705 cut-off events. For 169656/169656 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 23572 event pairs, 455 based on Foata normal form. 4/3704 useless extension candidates. Maximal degree in co-relation 22026. Up to 3241 conditions per place. [2024-06-27 19:26:15,797 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 60 changer transitions 0/315 dead transitions. [2024-06-27 19:26:15,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 315 transitions, 4020 flow [2024-06-27 19:26:15,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:26:15,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-27 19:26:15,798 INFO L175 Difference]: Start difference. First operand has 252 places, 298 transitions, 3300 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:26:15,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 315 transitions, 4020 flow [2024-06-27 19:26:16,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 315 transitions, 3850 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:16,365 INFO L231 Difference]: Finished difference. Result has 254 places, 301 transitions, 3338 flow [2024-06-27 19:26:16,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3338, PETRI_PLACES=254, PETRI_TRANSITIONS=301} [2024-06-27 19:26:16,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-27 19:26:16,366 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 301 transitions, 3338 flow [2024-06-27 19:26:16,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:16,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:16,366 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 19:26:16,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:26:16,366 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:16,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:16,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1331362178, now seen corresponding path program 4 times [2024-06-27 19:26:16,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:16,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78987455] [2024-06-27 19:26:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:16,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:16,446 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 19:26:16,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:16,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78987455] [2024-06-27 19:26:16,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78987455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:16,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:16,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:16,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646269348] [2024-06-27 19:26:16,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:16,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:16,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:16,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:16,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:16,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:16,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 301 transitions, 3338 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:16,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:16,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:16,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:17,016 INFO L124 PetriNetUnfolderBase]: 2163/3700 cut-off events. [2024-06-27 19:26:17,016 INFO L125 PetriNetUnfolderBase]: For 171550/171553 co-relation queries the response was YES. [2024-06-27 19:26:17,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22140 conditions, 3700 events. 2163/3700 cut-off events. For 171550/171553 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23498 event pairs, 463 based on Foata normal form. 6/3699 useless extension candidates. Maximal degree in co-relation 22021. Up to 3206 conditions per place. [2024-06-27 19:26:17,055 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 242 selfloop transitions, 68 changer transitions 0/318 dead transitions. [2024-06-27 19:26:17,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 318 transitions, 4093 flow [2024-06-27 19:26:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:26:17,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:26:17,056 INFO L175 Difference]: Start difference. First operand has 254 places, 301 transitions, 3338 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:26:17,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 318 transitions, 4093 flow [2024-06-27 19:26:17,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 318 transitions, 3905 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:17,686 INFO L231 Difference]: Finished difference. Result has 257 places, 306 transitions, 3423 flow [2024-06-27 19:26:17,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3423, PETRI_PLACES=257, PETRI_TRANSITIONS=306} [2024-06-27 19:26:17,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-27 19:26:17,686 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 306 transitions, 3423 flow [2024-06-27 19:26:17,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:17,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:17,687 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 19:26:17,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:26:17,687 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:17,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:17,687 INFO L85 PathProgramCache]: Analyzing trace with hash -613418445, now seen corresponding path program 1 times [2024-06-27 19:26:17,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:17,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768671894] [2024-06-27 19:26:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:17,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:17,780 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 19:26:17,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:17,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768671894] [2024-06-27 19:26:17,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768671894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:17,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:17,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:17,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073704084] [2024-06-27 19:26:17,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:17,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:17,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:17,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:17,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:17,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:17,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 306 transitions, 3423 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:17,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:17,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:17,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:18,402 INFO L124 PetriNetUnfolderBase]: 2322/3975 cut-off events. [2024-06-27 19:26:18,402 INFO L125 PetriNetUnfolderBase]: For 229163/229163 co-relation queries the response was YES. [2024-06-27 19:26:18,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25230 conditions, 3975 events. 2322/3975 cut-off events. For 229163/229163 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25562 event pairs, 410 based on Foata normal form. 12/3982 useless extension candidates. Maximal degree in co-relation 25109. Up to 2861 conditions per place. [2024-06-27 19:26:18,448 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 117 changer transitions 0/346 dead transitions. [2024-06-27 19:26:18,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 346 transitions, 4667 flow [2024-06-27 19:26:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:18,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:26:18,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:26:18,449 INFO L175 Difference]: Start difference. First operand has 257 places, 306 transitions, 3423 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:26:18,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 346 transitions, 4667 flow [2024-06-27 19:26:19,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 346 transitions, 4517 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:19,013 INFO L231 Difference]: Finished difference. Result has 264 places, 311 transitions, 3658 flow [2024-06-27 19:26:19,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3273, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3658, PETRI_PLACES=264, PETRI_TRANSITIONS=311} [2024-06-27 19:26:19,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-27 19:26:19,014 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 311 transitions, 3658 flow [2024-06-27 19:26:19,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:19,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:19,014 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 19:26:19,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:26:19,014 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:19,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:19,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1199599919, now seen corresponding path program 2 times [2024-06-27 19:26:19,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:19,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703878312] [2024-06-27 19:26:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:19,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:19,094 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 19:26:19,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:19,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703878312] [2024-06-27 19:26:19,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703878312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:19,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:19,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:19,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897202467] [2024-06-27 19:26:19,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:19,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:19,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:19,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:19,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:19,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:19,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 311 transitions, 3658 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:19,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:19,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:19,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:19,696 INFO L124 PetriNetUnfolderBase]: 2378/4066 cut-off events. [2024-06-27 19:26:19,696 INFO L125 PetriNetUnfolderBase]: For 248844/248844 co-relation queries the response was YES. [2024-06-27 19:26:19,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26460 conditions, 4066 events. 2378/4066 cut-off events. For 248844/248844 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26244 event pairs, 525 based on Foata normal form. 16/4077 useless extension candidates. Maximal degree in co-relation 26336. Up to 3384 conditions per place. [2024-06-27 19:26:19,742 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 213 selfloop transitions, 114 changer transitions 0/335 dead transitions. [2024-06-27 19:26:19,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 335 transitions, 4446 flow [2024-06-27 19:26:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:26:19,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:26:19,743 INFO L175 Difference]: Start difference. First operand has 264 places, 311 transitions, 3658 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:26:19,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 335 transitions, 4446 flow [2024-06-27 19:26:20,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 335 transitions, 4260 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:20,309 INFO L231 Difference]: Finished difference. Result has 269 places, 313 transitions, 3770 flow [2024-06-27 19:26:20,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3770, PETRI_PLACES=269, PETRI_TRANSITIONS=313} [2024-06-27 19:26:20,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-27 19:26:20,309 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 313 transitions, 3770 flow [2024-06-27 19:26:20,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:20,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:20,309 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 19:26:20,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:26:20,309 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:20,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:20,310 INFO L85 PathProgramCache]: Analyzing trace with hash 748920015, now seen corresponding path program 3 times [2024-06-27 19:26:20,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:20,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970684196] [2024-06-27 19:26:20,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:20,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:20,384 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 19:26:20,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:20,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970684196] [2024-06-27 19:26:20,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970684196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:20,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:20,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:20,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389557456] [2024-06-27 19:26:20,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:20,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:20,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:20,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:20,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:20,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:20,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 313 transitions, 3770 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:20,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:20,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:20,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:21,051 INFO L124 PetriNetUnfolderBase]: 2484/4242 cut-off events. [2024-06-27 19:26:21,051 INFO L125 PetriNetUnfolderBase]: For 271767/271767 co-relation queries the response was YES. [2024-06-27 19:26:21,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28466 conditions, 4242 events. 2484/4242 cut-off events. For 271767/271767 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27595 event pairs, 542 based on Foata normal form. 12/4249 useless extension candidates. Maximal degree in co-relation 28340. Up to 3390 conditions per place. [2024-06-27 19:26:21,101 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 223 selfloop transitions, 112 changer transitions 0/343 dead transitions. [2024-06-27 19:26:21,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 343 transitions, 4782 flow [2024-06-27 19:26:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:26:21,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:26:21,102 INFO L175 Difference]: Start difference. First operand has 269 places, 313 transitions, 3770 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:26:21,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 343 transitions, 4782 flow [2024-06-27 19:26:21,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 343 transitions, 4516 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:21,729 INFO L231 Difference]: Finished difference. Result has 272 places, 317 transitions, 3871 flow [2024-06-27 19:26:21,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3504, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3871, PETRI_PLACES=272, PETRI_TRANSITIONS=317} [2024-06-27 19:26:21,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-27 19:26:21,730 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 317 transitions, 3871 flow [2024-06-27 19:26:21,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:21,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:21,730 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 19:26:21,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:26:21,730 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:21,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:21,732 INFO L85 PathProgramCache]: Analyzing trace with hash 28126859, now seen corresponding path program 4 times [2024-06-27 19:26:21,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:21,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793151464] [2024-06-27 19:26:21,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:21,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:21,842 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 19:26:21,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:21,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793151464] [2024-06-27 19:26:21,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793151464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:21,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:21,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:21,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021386603] [2024-06-27 19:26:21,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:21,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:21,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:21,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:21,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 317 transitions, 3871 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:21,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:21,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:21,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:22,517 INFO L124 PetriNetUnfolderBase]: 2540/4326 cut-off events. [2024-06-27 19:26:22,517 INFO L125 PetriNetUnfolderBase]: For 295346/295346 co-relation queries the response was YES. [2024-06-27 19:26:22,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29230 conditions, 4326 events. 2540/4326 cut-off events. For 295346/295346 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 28220 event pairs, 557 based on Foata normal form. 16/4337 useless extension candidates. Maximal degree in co-relation 29102. Up to 3756 conditions per place. [2024-06-27 19:26:22,567 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 72 changer transitions 0/338 dead transitions. [2024-06-27 19:26:22,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 338 transitions, 4663 flow [2024-06-27 19:26:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:26:22,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-27 19:26:22,568 INFO L175 Difference]: Start difference. First operand has 272 places, 317 transitions, 3871 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:26:22,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 338 transitions, 4663 flow [2024-06-27 19:26:23,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 338 transitions, 4473 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:23,321 INFO L231 Difference]: Finished difference. Result has 276 places, 319 transitions, 3901 flow [2024-06-27 19:26:23,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3681, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3901, PETRI_PLACES=276, PETRI_TRANSITIONS=319} [2024-06-27 19:26:23,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-27 19:26:23,322 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 319 transitions, 3901 flow [2024-06-27 19:26:23,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:23,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:23,322 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 19:26:23,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:26:23,322 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:23,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:23,322 INFO L85 PathProgramCache]: Analyzing trace with hash 27978989, now seen corresponding path program 5 times [2024-06-27 19:26:23,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:23,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60089245] [2024-06-27 19:26:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:23,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:23,405 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 19:26:23,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60089245] [2024-06-27 19:26:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60089245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:23,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:23,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:23,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130383926] [2024-06-27 19:26:23,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:23,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:23,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:23,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:23,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:23,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:23,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 319 transitions, 3901 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:23,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:23,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:23,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:24,129 INFO L124 PetriNetUnfolderBase]: 2692/4568 cut-off events. [2024-06-27 19:26:24,129 INFO L125 PetriNetUnfolderBase]: For 341045/341045 co-relation queries the response was YES. [2024-06-27 19:26:24,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32543 conditions, 4568 events. 2692/4568 cut-off events. For 341045/341045 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29965 event pairs, 580 based on Foata normal form. 12/4575 useless extension candidates. Maximal degree in co-relation 32413. Up to 3750 conditions per place. [2024-06-27 19:26:24,181 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 269 selfloop transitions, 70 changer transitions 0/347 dead transitions. [2024-06-27 19:26:24,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 347 transitions, 4973 flow [2024-06-27 19:26:24,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:24,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:26:24,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-27 19:26:24,182 INFO L175 Difference]: Start difference. First operand has 276 places, 319 transitions, 3901 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:26:24,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 347 transitions, 4973 flow [2024-06-27 19:26:24,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 347 transitions, 4783 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:24,966 INFO L231 Difference]: Finished difference. Result has 279 places, 323 transitions, 4011 flow [2024-06-27 19:26:24,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3711, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4011, PETRI_PLACES=279, PETRI_TRANSITIONS=323} [2024-06-27 19:26:24,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-27 19:26:24,967 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 323 transitions, 4011 flow [2024-06-27 19:26:24,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:24,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:24,967 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 19:26:24,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:26:24,967 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:24,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:24,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1915178565, now seen corresponding path program 6 times [2024-06-27 19:26:24,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:24,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297598259] [2024-06-27 19:26:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:24,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:25,046 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 19:26:25,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:25,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297598259] [2024-06-27 19:26:25,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297598259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:25,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:25,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:25,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248752001] [2024-06-27 19:26:25,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:25,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:25,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:25,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:25,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:25,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 323 transitions, 4011 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:25,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:25,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:25,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:25,835 INFO L124 PetriNetUnfolderBase]: 2702/4590 cut-off events. [2024-06-27 19:26:25,836 INFO L125 PetriNetUnfolderBase]: For 341038/341038 co-relation queries the response was YES. [2024-06-27 19:26:25,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32111 conditions, 4590 events. 2702/4590 cut-off events. For 341038/341038 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30209 event pairs, 593 based on Foata normal form. 16/4601 useless extension candidates. Maximal degree in co-relation 31979. Up to 4010 conditions per place. [2024-06-27 19:26:25,882 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 260 selfloop transitions, 78 changer transitions 0/346 dead transitions. [2024-06-27 19:26:25,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 346 transitions, 4832 flow [2024-06-27 19:26:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:26:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:26:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-27 19:26:25,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-27 19:26:25,883 INFO L175 Difference]: Start difference. First operand has 279 places, 323 transitions, 4011 flow. Second operand 10 states and 230 transitions. [2024-06-27 19:26:25,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 346 transitions, 4832 flow [2024-06-27 19:26:26,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 346 transitions, 4680 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:26,701 INFO L231 Difference]: Finished difference. Result has 285 places, 325 transitions, 4100 flow [2024-06-27 19:26:26,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3861, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4100, PETRI_PLACES=285, PETRI_TRANSITIONS=325} [2024-06-27 19:26:26,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-27 19:26:26,702 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 325 transitions, 4100 flow [2024-06-27 19:26:26,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:26,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:26,702 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 19:26:26,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:26:26,702 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:26,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1914963363, now seen corresponding path program 1 times [2024-06-27 19:26:26,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:26,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566327328] [2024-06-27 19:26:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:26,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:26,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:26,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566327328] [2024-06-27 19:26:26,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566327328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:26,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:26,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:26,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826546136] [2024-06-27 19:26:26,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:26,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:26,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:26,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:26,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:26,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:26,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 325 transitions, 4100 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:26,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:26,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:26,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:27,567 INFO L124 PetriNetUnfolderBase]: 2742/4660 cut-off events. [2024-06-27 19:26:27,567 INFO L125 PetriNetUnfolderBase]: For 338817/338817 co-relation queries the response was YES. [2024-06-27 19:26:27,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32625 conditions, 4660 events. 2742/4660 cut-off events. For 338817/338817 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 30767 event pairs, 591 based on Foata normal form. 12/4667 useless extension candidates. Maximal degree in co-relation 32491. Up to 3950 conditions per place. [2024-06-27 19:26:27,624 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 85 changer transitions 0/351 dead transitions. [2024-06-27 19:26:27,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 351 transitions, 4944 flow [2024-06-27 19:26:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:26:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:26:27,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-27 19:26:27,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-27 19:26:27,625 INFO L175 Difference]: Start difference. First operand has 285 places, 325 transitions, 4100 flow. Second operand 10 states and 232 transitions. [2024-06-27 19:26:27,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 351 transitions, 4944 flow [2024-06-27 19:26:28,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 351 transitions, 4738 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 19:26:28,578 INFO L231 Difference]: Finished difference. Result has 287 places, 327 transitions, 4143 flow [2024-06-27 19:26:28,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4143, PETRI_PLACES=287, PETRI_TRANSITIONS=327} [2024-06-27 19:26:28,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-27 19:26:28,579 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 327 transitions, 4143 flow [2024-06-27 19:26:28,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:28,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:28,579 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 19:26:28,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:26:28,580 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:28,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:28,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1413609129, now seen corresponding path program 7 times [2024-06-27 19:26:28,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:28,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970659986] [2024-06-27 19:26:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:28,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:28,670 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 19:26:28,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:28,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970659986] [2024-06-27 19:26:28,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970659986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:28,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:28,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:28,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213875884] [2024-06-27 19:26:28,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:28,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:28,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:28,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:28,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:28,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:28,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 327 transitions, 4143 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:28,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:28,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:28,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:29,573 INFO L124 PetriNetUnfolderBase]: 2798/4747 cut-off events. [2024-06-27 19:26:29,573 INFO L125 PetriNetUnfolderBase]: For 361962/361965 co-relation queries the response was YES. [2024-06-27 19:26:29,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33338 conditions, 4747 events. 2798/4747 cut-off events. For 361962/361965 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 31503 event pairs, 632 based on Foata normal form. 18/4758 useless extension candidates. Maximal degree in co-relation 33203. Up to 4074 conditions per place. [2024-06-27 19:26:29,632 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 120 changer transitions 0/349 dead transitions. [2024-06-27 19:26:29,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 349 transitions, 4971 flow [2024-06-27 19:26:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-27 19:26:29,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-27 19:26:29,633 INFO L175 Difference]: Start difference. First operand has 287 places, 327 transitions, 4143 flow. Second operand 9 states and 210 transitions. [2024-06-27 19:26:29,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 349 transitions, 4971 flow [2024-06-27 19:26:30,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 349 transitions, 4746 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 19:26:30,646 INFO L231 Difference]: Finished difference. Result has 288 places, 329 transitions, 4246 flow [2024-06-27 19:26:30,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3918, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4246, PETRI_PLACES=288, PETRI_TRANSITIONS=329} [2024-06-27 19:26:30,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-27 19:26:30,647 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 329 transitions, 4246 flow [2024-06-27 19:26:30,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:30,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:30,647 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 19:26:30,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:26:30,648 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:30,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1219669719, now seen corresponding path program 8 times [2024-06-27 19:26:30,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:30,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284440505] [2024-06-27 19:26:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:30,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:30,725 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 19:26:30,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:30,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284440505] [2024-06-27 19:26:30,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284440505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:30,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:30,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:30,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441588922] [2024-06-27 19:26:30,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:30,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:30,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:30,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:30,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:30,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:30,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 329 transitions, 4246 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:30,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:30,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:30,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:31,500 INFO L124 PetriNetUnfolderBase]: 2854/4834 cut-off events. [2024-06-27 19:26:31,501 INFO L125 PetriNetUnfolderBase]: For 374157/374157 co-relation queries the response was YES. [2024-06-27 19:26:31,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34150 conditions, 4834 events. 2854/4834 cut-off events. For 374157/374157 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32107 event pairs, 619 based on Foata normal form. 16/4845 useless extension candidates. Maximal degree in co-relation 34014. Up to 4098 conditions per place. [2024-06-27 19:26:31,558 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 225 selfloop transitions, 121 changer transitions 0/354 dead transitions. [2024-06-27 19:26:31,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 354 transitions, 5096 flow [2024-06-27 19:26:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-27 19:26:31,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-27 19:26:31,559 INFO L175 Difference]: Start difference. First operand has 288 places, 329 transitions, 4246 flow. Second operand 9 states and 213 transitions. [2024-06-27 19:26:31,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 354 transitions, 5096 flow [2024-06-27 19:26:32,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 354 transitions, 4798 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 19:26:32,485 INFO L231 Difference]: Finished difference. Result has 290 places, 331 transitions, 4286 flow [2024-06-27 19:26:32,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3948, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4286, PETRI_PLACES=290, PETRI_TRANSITIONS=331} [2024-06-27 19:26:32,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-27 19:26:32,485 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 331 transitions, 4286 flow [2024-06-27 19:26:32,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:32,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:32,486 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 19:26:32,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:26:32,486 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:32,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:32,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1363796719, now seen corresponding path program 9 times [2024-06-27 19:26:32,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:32,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888099058] [2024-06-27 19:26:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:32,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:32,568 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 19:26:32,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:32,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888099058] [2024-06-27 19:26:32,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888099058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:32,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:32,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:32,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653417325] [2024-06-27 19:26:32,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:32,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:32,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:32,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:32,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:32,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:32,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 331 transitions, 4286 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:32,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:32,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:32,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:33,390 INFO L124 PetriNetUnfolderBase]: 2897/4911 cut-off events. [2024-06-27 19:26:33,391 INFO L125 PetriNetUnfolderBase]: For 379656/379656 co-relation queries the response was YES. [2024-06-27 19:26:33,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34506 conditions, 4911 events. 2897/4911 cut-off events. For 379656/379656 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32726 event pairs, 632 based on Foata normal form. 16/4922 useless extension candidates. Maximal degree in co-relation 34369. Up to 4167 conditions per place. [2024-06-27 19:26:33,445 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 237 selfloop transitions, 109 changer transitions 0/354 dead transitions. [2024-06-27 19:26:33,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 354 transitions, 5136 flow [2024-06-27 19:26:33,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:26:33,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:26:33,446 INFO L175 Difference]: Start difference. First operand has 290 places, 331 transitions, 4286 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:26:33,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 354 transitions, 5136 flow [2024-06-27 19:26:34,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 354 transitions, 4840 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 19:26:34,384 INFO L231 Difference]: Finished difference. Result has 290 places, 333 transitions, 4308 flow [2024-06-27 19:26:34,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4308, PETRI_PLACES=290, PETRI_TRANSITIONS=333} [2024-06-27 19:26:34,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-27 19:26:34,384 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 333 transitions, 4308 flow [2024-06-27 19:26:34,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:34,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:34,384 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 19:26:34,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:26:34,384 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:34,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1214159469, now seen corresponding path program 10 times [2024-06-27 19:26:34,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:34,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5341597] [2024-06-27 19:26:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:34,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:34,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:34,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5341597] [2024-06-27 19:26:34,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5341597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:34,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:34,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:34,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056681908] [2024-06-27 19:26:34,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:34,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:34,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:34,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:34,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:34,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:34,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 333 transitions, 4308 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:34,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:34,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:34,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:35,274 INFO L124 PetriNetUnfolderBase]: 2911/4944 cut-off events. [2024-06-27 19:26:35,274 INFO L125 PetriNetUnfolderBase]: For 359094/359094 co-relation queries the response was YES. [2024-06-27 19:26:35,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34027 conditions, 4944 events. 2911/4944 cut-off events. For 359094/359094 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32976 event pairs, 511 based on Foata normal form. 12/4951 useless extension candidates. Maximal degree in co-relation 33889. Up to 3526 conditions per place. [2024-06-27 19:26:35,333 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 239 selfloop transitions, 117 changer transitions 0/364 dead transitions. [2024-06-27 19:26:35,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 364 transitions, 5392 flow [2024-06-27 19:26:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:35,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:26:35,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-27 19:26:35,334 INFO L175 Difference]: Start difference. First operand has 290 places, 333 transitions, 4308 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:26:35,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 364 transitions, 5392 flow [2024-06-27 19:26:36,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 364 transitions, 5118 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:36,326 INFO L231 Difference]: Finished difference. Result has 293 places, 336 transitions, 4459 flow [2024-06-27 19:26:36,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4034, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4459, PETRI_PLACES=293, PETRI_TRANSITIONS=336} [2024-06-27 19:26:36,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-27 19:26:36,326 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 336 transitions, 4459 flow [2024-06-27 19:26:36,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:36,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:36,327 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 19:26:36,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:26:36,327 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:36,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:36,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1411749217, now seen corresponding path program 2 times [2024-06-27 19:26:36,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:36,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956245854] [2024-06-27 19:26:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:36,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:36,416 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 19:26:36,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:36,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956245854] [2024-06-27 19:26:36,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956245854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:36,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:36,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:36,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724998885] [2024-06-27 19:26:36,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:36,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:36,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:36,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:36,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:36,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:36,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 336 transitions, 4459 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:36,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:36,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:36,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:37,341 INFO L124 PetriNetUnfolderBase]: 2951/5012 cut-off events. [2024-06-27 19:26:37,342 INFO L125 PetriNetUnfolderBase]: For 370155/370158 co-relation queries the response was YES. [2024-06-27 19:26:37,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34801 conditions, 5012 events. 2951/5012 cut-off events. For 370155/370158 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33621 event pairs, 651 based on Foata normal form. 14/5019 useless extension candidates. Maximal degree in co-relation 34661. Up to 4261 conditions per place. [2024-06-27 19:26:37,399 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 125 changer transitions 0/362 dead transitions. [2024-06-27 19:26:37,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 362 transitions, 5337 flow [2024-06-27 19:26:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:26:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:26:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-27 19:26:37,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-27 19:26:37,404 INFO L175 Difference]: Start difference. First operand has 293 places, 336 transitions, 4459 flow. Second operand 10 states and 232 transitions. [2024-06-27 19:26:37,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 362 transitions, 5337 flow [2024-06-27 19:26:38,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 362 transitions, 4931 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:38,556 INFO L231 Difference]: Finished difference. Result has 297 places, 338 transitions, 4394 flow [2024-06-27 19:26:38,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4394, PETRI_PLACES=297, PETRI_TRANSITIONS=338} [2024-06-27 19:26:38,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-27 19:26:38,557 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 338 transitions, 4394 flow [2024-06-27 19:26:38,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:38,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:38,557 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 19:26:38,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:26:38,557 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:38,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:38,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1677446497, now seen corresponding path program 3 times [2024-06-27 19:26:38,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:38,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179380264] [2024-06-27 19:26:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:38,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:38,641 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 19:26:38,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:38,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179380264] [2024-06-27 19:26:38,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179380264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:38,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:38,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:38,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146623642] [2024-06-27 19:26:38,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:38,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:38,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:38,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:38,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:38,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 338 transitions, 4394 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:38,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:38,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:38,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:39,477 INFO L124 PetriNetUnfolderBase]: 3024/5145 cut-off events. [2024-06-27 19:26:39,477 INFO L125 PetriNetUnfolderBase]: For 382805/382808 co-relation queries the response was YES. [2024-06-27 19:26:39,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35275 conditions, 5145 events. 3024/5145 cut-off events. For 382805/382808 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34691 event pairs, 652 based on Foata normal form. 14/5152 useless extension candidates. Maximal degree in co-relation 35135. Up to 3898 conditions per place. [2024-06-27 19:26:39,540 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 147 changer transitions 0/366 dead transitions. [2024-06-27 19:26:39,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 366 transitions, 5462 flow [2024-06-27 19:26:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 19:26:39,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-27 19:26:39,541 INFO L175 Difference]: Start difference. First operand has 297 places, 338 transitions, 4394 flow. Second operand 9 states and 214 transitions. [2024-06-27 19:26:39,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 366 transitions, 5462 flow [2024-06-27 19:26:40,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 366 transitions, 5147 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 19:26:40,506 INFO L231 Difference]: Finished difference. Result has 298 places, 341 transitions, 4492 flow [2024-06-27 19:26:40,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4492, PETRI_PLACES=298, PETRI_TRANSITIONS=341} [2024-06-27 19:26:40,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-27 19:26:40,506 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 341 transitions, 4492 flow [2024-06-27 19:26:40,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:40,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:40,507 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 19:26:40,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:26:40,507 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:40,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:40,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1358219137, now seen corresponding path program 4 times [2024-06-27 19:26:40,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:40,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52360213] [2024-06-27 19:26:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:40,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:40,587 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 19:26:40,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:40,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52360213] [2024-06-27 19:26:40,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52360213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:40,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:40,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:40,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036874312] [2024-06-27 19:26:40,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:40,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:40,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:40,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:40,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:40,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:40,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 341 transitions, 4492 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:40,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:40,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:40,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:41,458 INFO L124 PetriNetUnfolderBase]: 2998/5100 cut-off events. [2024-06-27 19:26:41,458 INFO L125 PetriNetUnfolderBase]: For 353852/353852 co-relation queries the response was YES. [2024-06-27 19:26:41,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34018 conditions, 5100 events. 2998/5100 cut-off events. For 353852/353852 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34306 event pairs, 631 based on Foata normal form. 12/5107 useless extension candidates. Maximal degree in co-relation 33877. Up to 4086 conditions per place. [2024-06-27 19:26:41,516 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 224 selfloop transitions, 135 changer transitions 0/367 dead transitions. [2024-06-27 19:26:41,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 367 transitions, 5304 flow [2024-06-27 19:26:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:26:41,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-27 19:26:41,517 INFO L175 Difference]: Start difference. First operand has 298 places, 341 transitions, 4492 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:26:41,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 367 transitions, 5304 flow [2024-06-27 19:26:42,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 367 transitions, 5013 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:42,739 INFO L231 Difference]: Finished difference. Result has 301 places, 341 transitions, 4479 flow [2024-06-27 19:26:42,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4479, PETRI_PLACES=301, PETRI_TRANSITIONS=341} [2024-06-27 19:26:42,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-27 19:26:42,739 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 341 transitions, 4479 flow [2024-06-27 19:26:42,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:42,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:42,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:42,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:26:42,740 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:42,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash 983496381, now seen corresponding path program 1 times [2024-06-27 19:26:42,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:42,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882309733] [2024-06-27 19:26:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:42,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:42,813 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 19:26:42,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:42,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882309733] [2024-06-27 19:26:42,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882309733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:42,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:42,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:42,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769625790] [2024-06-27 19:26:42,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:42,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:42,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:42,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:42,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 341 transitions, 4479 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:42,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:42,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:42,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:43,637 INFO L124 PetriNetUnfolderBase]: 3019/5136 cut-off events. [2024-06-27 19:26:43,637 INFO L125 PetriNetUnfolderBase]: For 327451/327451 co-relation queries the response was YES. [2024-06-27 19:26:43,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34289 conditions, 5136 events. 3019/5136 cut-off events. For 327451/327451 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 34636 event pairs, 645 based on Foata normal form. 1/5133 useless extension candidates. Maximal degree in co-relation 34147. Up to 4641 conditions per place. [2024-06-27 19:26:43,699 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 42 changer transitions 0/379 dead transitions. [2024-06-27 19:26:43,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 379 transitions, 5589 flow [2024-06-27 19:26:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:26:43,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:26:43,700 INFO L175 Difference]: Start difference. First operand has 301 places, 341 transitions, 4479 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:26:43,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 379 transitions, 5589 flow [2024-06-27 19:26:44,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 379 transitions, 5204 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 19:26:44,940 INFO L231 Difference]: Finished difference. Result has 301 places, 348 transitions, 4339 flow [2024-06-27 19:26:44,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4096, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4339, PETRI_PLACES=301, PETRI_TRANSITIONS=348} [2024-06-27 19:26:44,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-27 19:26:44,940 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 348 transitions, 4339 flow [2024-06-27 19:26:44,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:44,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:44,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:44,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:26:44,941 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:44,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:44,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633115, now seen corresponding path program 1 times [2024-06-27 19:26:44,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:44,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051161424] [2024-06-27 19:26:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:44,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:45,013 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 19:26:45,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:45,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051161424] [2024-06-27 19:26:45,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051161424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:45,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:45,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:45,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520801048] [2024-06-27 19:26:45,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:45,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:45,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:45,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:45,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:45,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:45,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 348 transitions, 4339 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:26:45,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:45,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:45,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:45,830 INFO L124 PetriNetUnfolderBase]: 3037/5161 cut-off events. [2024-06-27 19:26:45,830 INFO L125 PetriNetUnfolderBase]: For 330451/330451 co-relation queries the response was YES. [2024-06-27 19:26:45,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34330 conditions, 5161 events. 3037/5161 cut-off events. For 330451/330451 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 34926 event pairs, 665 based on Foata normal form. 1/5154 useless extension candidates. Maximal degree in co-relation 34187. Up to 4588 conditions per place. [2024-06-27 19:26:45,890 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 292 selfloop transitions, 71 changer transitions 0/371 dead transitions. [2024-06-27 19:26:45,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 371 transitions, 5339 flow [2024-06-27 19:26:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:26:45,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:26:45,891 INFO L175 Difference]: Start difference. First operand has 301 places, 348 transitions, 4339 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:26:45,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 371 transitions, 5339 flow [2024-06-27 19:26:47,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 371 transitions, 5199 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:47,179 INFO L231 Difference]: Finished difference. Result has 304 places, 357 transitions, 4469 flow [2024-06-27 19:26:47,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4469, PETRI_PLACES=304, PETRI_TRANSITIONS=357} [2024-06-27 19:26:47,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-27 19:26:47,180 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 357 transitions, 4469 flow [2024-06-27 19:26:47,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:26:47,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:47,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:47,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:26:47,180 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:47,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash -552932441, now seen corresponding path program 2 times [2024-06-27 19:26:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:47,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023223448] [2024-06-27 19:26:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:47,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:47,261 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 19:26:47,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:47,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023223448] [2024-06-27 19:26:47,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023223448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:47,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:47,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:47,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230428049] [2024-06-27 19:26:47,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:47,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:47,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:47,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:47,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 357 transitions, 4469 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:47,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:47,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:47,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:48,130 INFO L124 PetriNetUnfolderBase]: 3042/5178 cut-off events. [2024-06-27 19:26:48,130 INFO L125 PetriNetUnfolderBase]: For 338147/338147 co-relation queries the response was YES. [2024-06-27 19:26:48,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34606 conditions, 5178 events. 3042/5178 cut-off events. For 338147/338147 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34955 event pairs, 646 based on Foata normal form. 1/5175 useless extension candidates. Maximal degree in co-relation 34460. Up to 4689 conditions per place. [2024-06-27 19:26:48,195 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 340 selfloop transitions, 39 changer transitions 0/387 dead transitions. [2024-06-27 19:26:48,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 387 transitions, 5336 flow [2024-06-27 19:26:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:26:48,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:26:48,197 INFO L175 Difference]: Start difference. First operand has 304 places, 357 transitions, 4469 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:26:48,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 387 transitions, 5336 flow [2024-06-27 19:26:49,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 387 transitions, 5307 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 19:26:49,609 INFO L231 Difference]: Finished difference. Result has 311 places, 360 transitions, 4571 flow [2024-06-27 19:26:49,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4571, PETRI_PLACES=311, PETRI_TRANSITIONS=360} [2024-06-27 19:26:49,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-27 19:26:49,609 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 360 transitions, 4571 flow [2024-06-27 19:26:49,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:49,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:49,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:49,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:26:49,610 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:49,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:49,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1232625609, now seen corresponding path program 2 times [2024-06-27 19:26:49,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:49,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762081024] [2024-06-27 19:26:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:49,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:49,682 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 19:26:49,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:49,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762081024] [2024-06-27 19:26:49,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762081024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:49,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:49,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:49,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321159387] [2024-06-27 19:26:49,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:49,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:49,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:49,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:49,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:49,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:49,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 360 transitions, 4571 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:26:49,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:49,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:49,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:50,500 INFO L124 PetriNetUnfolderBase]: 3047/5177 cut-off events. [2024-06-27 19:26:50,500 INFO L125 PetriNetUnfolderBase]: For 346415/346415 co-relation queries the response was YES. [2024-06-27 19:26:50,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34872 conditions, 5177 events. 3047/5177 cut-off events. For 346415/346415 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34993 event pairs, 665 based on Foata normal form. 1/5170 useless extension candidates. Maximal degree in co-relation 34724. Up to 4601 conditions per place. [2024-06-27 19:26:50,564 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 292 selfloop transitions, 76 changer transitions 0/376 dead transitions. [2024-06-27 19:26:50,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 376 transitions, 5530 flow [2024-06-27 19:26:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 19:26:50,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:26:50,565 INFO L175 Difference]: Start difference. First operand has 311 places, 360 transitions, 4571 flow. Second operand 5 states and 130 transitions. [2024-06-27 19:26:50,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 376 transitions, 5530 flow [2024-06-27 19:26:51,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 376 transitions, 5390 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 19:26:51,806 INFO L231 Difference]: Finished difference. Result has 309 places, 363 transitions, 4642 flow [2024-06-27 19:26:51,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4642, PETRI_PLACES=309, PETRI_TRANSITIONS=363} [2024-06-27 19:26:51,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-27 19:26:51,806 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 363 transitions, 4642 flow [2024-06-27 19:26:51,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:26:51,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:51,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:51,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:26:51,807 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:51,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:51,807 INFO L85 PathProgramCache]: Analyzing trace with hash -704383911, now seen corresponding path program 3 times [2024-06-27 19:26:51,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:51,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154729273] [2024-06-27 19:26:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:51,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:51,889 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 19:26:51,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:51,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154729273] [2024-06-27 19:26:51,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154729273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:51,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:51,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:51,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093813500] [2024-06-27 19:26:51,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:51,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:51,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:51,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:51,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:51,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 363 transitions, 4642 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:51,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:51,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:51,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:52,795 INFO L124 PetriNetUnfolderBase]: 3062/5206 cut-off events. [2024-06-27 19:26:52,795 INFO L125 PetriNetUnfolderBase]: For 354729/354729 co-relation queries the response was YES. [2024-06-27 19:26:52,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35214 conditions, 5206 events. 3062/5206 cut-off events. For 354729/354729 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35155 event pairs, 644 based on Foata normal form. 1/5203 useless extension candidates. Maximal degree in co-relation 35066. Up to 4708 conditions per place. [2024-06-27 19:26:52,861 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 49 changer transitions 0/402 dead transitions. [2024-06-27 19:26:52,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 402 transitions, 5628 flow [2024-06-27 19:26:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:26:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:26:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-27 19:26:52,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565410199556541 [2024-06-27 19:26:52,862 INFO L175 Difference]: Start difference. First operand has 309 places, 363 transitions, 4642 flow. Second operand 11 states and 255 transitions. [2024-06-27 19:26:52,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 402 transitions, 5628 flow [2024-06-27 19:26:53,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 402 transitions, 5511 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:53,852 INFO L231 Difference]: Finished difference. Result has 316 places, 372 transitions, 4759 flow [2024-06-27 19:26:53,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4530, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4759, PETRI_PLACES=316, PETRI_TRANSITIONS=372} [2024-06-27 19:26:53,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-27 19:26:53,852 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 372 transitions, 4759 flow [2024-06-27 19:26:53,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:26:53,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:53,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:53,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:26:53,853 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:53,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash 268955137, now seen corresponding path program 3 times [2024-06-27 19:26:53,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:53,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694321528] [2024-06-27 19:26:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:53,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:53,922 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 19:26:53,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:53,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694321528] [2024-06-27 19:26:53,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694321528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:53,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:53,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:53,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125739808] [2024-06-27 19:26:53,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:53,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:53,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:53,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:53,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:53,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:53,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 372 transitions, 4759 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:26:53,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:53,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:53,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:54,738 INFO L124 PetriNetUnfolderBase]: 3059/5194 cut-off events. [2024-06-27 19:26:54,739 INFO L125 PetriNetUnfolderBase]: For 343933/343933 co-relation queries the response was YES. [2024-06-27 19:26:54,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34946 conditions, 5194 events. 3059/5194 cut-off events. For 343933/343933 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 35095 event pairs, 661 based on Foata normal form. 1/5187 useless extension candidates. Maximal degree in co-relation 34799. Up to 4611 conditions per place. [2024-06-27 19:26:54,803 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 290 selfloop transitions, 88 changer transitions 0/386 dead transitions. [2024-06-27 19:26:54,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 386 transitions, 5549 flow [2024-06-27 19:26:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:26:54,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:26:54,804 INFO L175 Difference]: Start difference. First operand has 316 places, 372 transitions, 4759 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:26:54,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 386 transitions, 5549 flow [2024-06-27 19:26:56,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 386 transitions, 5417 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 19:26:56,060 INFO L231 Difference]: Finished difference. Result has 316 places, 372 transitions, 4814 flow [2024-06-27 19:26:56,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4814, PETRI_PLACES=316, PETRI_TRANSITIONS=372} [2024-06-27 19:26:56,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-27 19:26:56,060 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 372 transitions, 4814 flow [2024-06-27 19:26:56,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:26:56,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:56,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:56,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:26:56,061 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:56,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:56,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1203568795, now seen corresponding path program 1 times [2024-06-27 19:26:56,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:56,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860534637] [2024-06-27 19:26:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:56,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:56,131 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 19:26:56,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:56,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860534637] [2024-06-27 19:26:56,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860534637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:56,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:56,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:56,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990568452] [2024-06-27 19:26:56,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:56,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:56,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:56,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:56,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:56,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 372 transitions, 4814 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:26:56,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:56,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:56,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:56,959 INFO L124 PetriNetUnfolderBase]: 3087/5246 cut-off events. [2024-06-27 19:26:56,959 INFO L125 PetriNetUnfolderBase]: For 368687/368687 co-relation queries the response was YES. [2024-06-27 19:26:57,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35343 conditions, 5246 events. 3087/5246 cut-off events. For 368687/368687 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 35503 event pairs, 565 based on Foata normal form. 6/5244 useless extension candidates. Maximal degree in co-relation 35195. Up to 4526 conditions per place. [2024-06-27 19:26:57,024 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 360 selfloop transitions, 30 changer transitions 0/398 dead transitions. [2024-06-27 19:26:57,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 398 transitions, 5901 flow [2024-06-27 19:26:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:26:57,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 19:26:57,025 INFO L175 Difference]: Start difference. First operand has 316 places, 372 transitions, 4814 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:26:57,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 398 transitions, 5901 flow [2024-06-27 19:26:58,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 398 transitions, 5657 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:26:58,233 INFO L231 Difference]: Finished difference. Result has 316 places, 375 transitions, 4674 flow [2024-06-27 19:26:58,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4572, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4674, PETRI_PLACES=316, PETRI_TRANSITIONS=375} [2024-06-27 19:26:58,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-27 19:26:58,234 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 375 transitions, 4674 flow [2024-06-27 19:26:58,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:26:58,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:58,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:58,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:26:58,234 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:58,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash -707157171, now seen corresponding path program 2 times [2024-06-27 19:26:58,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:58,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590196789] [2024-06-27 19:26:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:58,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:58,310 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 19:26:58,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:58,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590196789] [2024-06-27 19:26:58,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590196789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:58,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:58,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:58,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054641496] [2024-06-27 19:26:58,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:58,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:58,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:58,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:58,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:58,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:58,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 375 transitions, 4674 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:26:58,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:58,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:58,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:59,105 INFO L124 PetriNetUnfolderBase]: 3074/5227 cut-off events. [2024-06-27 19:26:59,105 INFO L125 PetriNetUnfolderBase]: For 349512/349512 co-relation queries the response was YES. [2024-06-27 19:26:59,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34690 conditions, 5227 events. 3074/5227 cut-off events. For 349512/349512 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35368 event pairs, 554 based on Foata normal form. 6/5225 useless extension candidates. Maximal degree in co-relation 34541. Up to 4520 conditions per place. [2024-06-27 19:26:59,169 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 357 selfloop transitions, 30 changer transitions 0/395 dead transitions. [2024-06-27 19:26:59,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 395 transitions, 5556 flow [2024-06-27 19:26:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 19:26:59,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-27 19:26:59,172 INFO L175 Difference]: Start difference. First operand has 316 places, 375 transitions, 4674 flow. Second operand 5 states and 129 transitions. [2024-06-27 19:26:59,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 395 transitions, 5556 flow [2024-06-27 19:27:00,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 395 transitions, 5489 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:27:00,382 INFO L231 Difference]: Finished difference. Result has 318 places, 375 transitions, 4673 flow [2024-06-27 19:27:00,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4673, PETRI_PLACES=318, PETRI_TRANSITIONS=375} [2024-06-27 19:27:00,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-27 19:27:00,382 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 375 transitions, 4673 flow [2024-06-27 19:27:00,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:00,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:00,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:00,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:27:00,383 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:00,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:00,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1794771689, now seen corresponding path program 4 times [2024-06-27 19:27:00,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:00,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644032277] [2024-06-27 19:27:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:00,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:00,454 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 19:27:00,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:00,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644032277] [2024-06-27 19:27:00,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644032277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:00,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:00,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286689556] [2024-06-27 19:27:00,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:00,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:00,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:00,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:00,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 375 transitions, 4673 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:00,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:00,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:00,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:01,281 INFO L124 PetriNetUnfolderBase]: 3119/5304 cut-off events. [2024-06-27 19:27:01,281 INFO L125 PetriNetUnfolderBase]: For 359089/359092 co-relation queries the response was YES. [2024-06-27 19:27:01,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35672 conditions, 5304 events. 3119/5304 cut-off events. For 359089/359092 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35963 event pairs, 679 based on Foata normal form. 1/5290 useless extension candidates. Maximal degree in co-relation 35523. Up to 4302 conditions per place. [2024-06-27 19:27:01,347 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 182 changer transitions 0/424 dead transitions. [2024-06-27 19:27:01,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 424 transitions, 6587 flow [2024-06-27 19:27:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 19:27:01,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-27 19:27:01,348 INFO L175 Difference]: Start difference. First operand has 318 places, 375 transitions, 4673 flow. Second operand 8 states and 211 transitions. [2024-06-27 19:27:01,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 424 transitions, 6587 flow [2024-06-27 19:27:02,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 424 transitions, 6496 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:02,632 INFO L231 Difference]: Finished difference. Result has 321 places, 393 transitions, 5326 flow [2024-06-27 19:27:02,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4590, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5326, PETRI_PLACES=321, PETRI_TRANSITIONS=393} [2024-06-27 19:27:02,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-27 19:27:02,632 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 393 transitions, 5326 flow [2024-06-27 19:27:02,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:02,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:02,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:02,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:27:02,633 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:02,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:02,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1285311543, now seen corresponding path program 5 times [2024-06-27 19:27:02,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:02,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313855454] [2024-06-27 19:27:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:02,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:02,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:02,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313855454] [2024-06-27 19:27:02,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313855454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:02,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:02,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:02,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122281169] [2024-06-27 19:27:02,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:02,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:02,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:02,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:02,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:02,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 393 transitions, 5326 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:02,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:02,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:02,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:03,553 INFO L124 PetriNetUnfolderBase]: 3132/5322 cut-off events. [2024-06-27 19:27:03,554 INFO L125 PetriNetUnfolderBase]: For 367345/367348 co-relation queries the response was YES. [2024-06-27 19:27:03,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36880 conditions, 5322 events. 3132/5322 cut-off events. For 367345/367348 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 36094 event pairs, 679 based on Foata normal form. 1/5308 useless extension candidates. Maximal degree in co-relation 36731. Up to 4312 conditions per place. [2024-06-27 19:27:03,620 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 187 changer transitions 0/427 dead transitions. [2024-06-27 19:27:03,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 427 transitions, 7028 flow [2024-06-27 19:27:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:27:03,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-27 19:27:03,622 INFO L175 Difference]: Start difference. First operand has 321 places, 393 transitions, 5326 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:27:03,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 427 transitions, 7028 flow [2024-06-27 19:27:04,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 427 transitions, 6774 flow, removed 111 selfloop flow, removed 1 redundant places. [2024-06-27 19:27:04,905 INFO L231 Difference]: Finished difference. Result has 328 places, 399 transitions, 5600 flow [2024-06-27 19:27:04,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5130, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5600, PETRI_PLACES=328, PETRI_TRANSITIONS=399} [2024-06-27 19:27:04,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-27 19:27:04,905 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 399 transitions, 5600 flow [2024-06-27 19:27:04,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:04,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:04,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:04,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:27:04,906 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:04,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:04,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1766211147, now seen corresponding path program 6 times [2024-06-27 19:27:04,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:04,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761184093] [2024-06-27 19:27:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:04,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:04,992 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 19:27:04,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:04,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761184093] [2024-06-27 19:27:04,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761184093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:04,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:04,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:04,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444863500] [2024-06-27 19:27:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:04,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:04,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:05,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:05,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 399 transitions, 5600 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:05,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:05,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:05,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:05,955 INFO L124 PetriNetUnfolderBase]: 3129/5318 cut-off events. [2024-06-27 19:27:05,955 INFO L125 PetriNetUnfolderBase]: For 366891/366894 co-relation queries the response was YES. [2024-06-27 19:27:06,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36475 conditions, 5318 events. 3129/5318 cut-off events. For 366891/366894 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 36095 event pairs, 679 based on Foata normal form. 1/5304 useless extension candidates. Maximal degree in co-relation 36323. Up to 4310 conditions per place. [2024-06-27 19:27:06,022 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 239 selfloop transitions, 184 changer transitions 0/431 dead transitions. [2024-06-27 19:27:06,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 431 transitions, 7344 flow [2024-06-27 19:27:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 19:27:06,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649390243902439 [2024-06-27 19:27:06,023 INFO L175 Difference]: Start difference. First operand has 328 places, 399 transitions, 5600 flow. Second operand 8 states and 213 transitions. [2024-06-27 19:27:06,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 431 transitions, 7344 flow [2024-06-27 19:27:07,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 431 transitions, 6978 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:07,570 INFO L231 Difference]: Finished difference. Result has 332 places, 399 transitions, 5608 flow [2024-06-27 19:27:07,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5234, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5608, PETRI_PLACES=332, PETRI_TRANSITIONS=399} [2024-06-27 19:27:07,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-27 19:27:07,570 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 399 transitions, 5608 flow [2024-06-27 19:27:07,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:07,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:07,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:07,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:27:07,571 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:07,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:07,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1290852483, now seen corresponding path program 7 times [2024-06-27 19:27:07,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:07,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30489501] [2024-06-27 19:27:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:07,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:07,659 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 19:27:07,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:07,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30489501] [2024-06-27 19:27:07,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30489501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:07,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:07,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:07,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731449153] [2024-06-27 19:27:07,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:07,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:07,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:07,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:07,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:07,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 399 transitions, 5608 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:07,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:07,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:07,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:08,619 INFO L124 PetriNetUnfolderBase]: 3139/5353 cut-off events. [2024-06-27 19:27:08,619 INFO L125 PetriNetUnfolderBase]: For 375006/375009 co-relation queries the response was YES. [2024-06-27 19:27:08,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36691 conditions, 5353 events. 3139/5353 cut-off events. For 375006/375009 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 36494 event pairs, 671 based on Foata normal form. 3/5346 useless extension candidates. Maximal degree in co-relation 36538. Up to 4664 conditions per place. [2024-06-27 19:27:08,689 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 101 changer transitions 0/430 dead transitions. [2024-06-27 19:27:08,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 430 transitions, 6772 flow [2024-06-27 19:27:08,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:08,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:27:08,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:27:08,690 INFO L175 Difference]: Start difference. First operand has 332 places, 399 transitions, 5608 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:27:08,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 430 transitions, 6772 flow [2024-06-27 19:27:10,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 430 transitions, 6285 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 19:27:10,381 INFO L231 Difference]: Finished difference. Result has 332 places, 405 transitions, 5427 flow [2024-06-27 19:27:10,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5145, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5427, PETRI_PLACES=332, PETRI_TRANSITIONS=405} [2024-06-27 19:27:10,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-27 19:27:10,381 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 405 transitions, 5427 flow [2024-06-27 19:27:10,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:10,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:10,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:10,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:27:10,382 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:10,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:10,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1542172991, now seen corresponding path program 4 times [2024-06-27 19:27:10,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:10,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400551198] [2024-06-27 19:27:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:10,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:10,448 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 19:27:10,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:10,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400551198] [2024-06-27 19:27:10,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400551198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:10,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:10,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:10,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881020105] [2024-06-27 19:27:10,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:10,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:10,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:10,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:10,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 405 transitions, 5427 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:10,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:10,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:10,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:11,403 INFO L124 PetriNetUnfolderBase]: 3149/5351 cut-off events. [2024-06-27 19:27:11,403 INFO L125 PetriNetUnfolderBase]: For 381771/381771 co-relation queries the response was YES. [2024-06-27 19:27:11,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36473 conditions, 5351 events. 3149/5351 cut-off events. For 381771/381771 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36461 event pairs, 663 based on Foata normal form. 1/5344 useless extension candidates. Maximal degree in co-relation 36320. Up to 4677 conditions per place. [2024-06-27 19:27:11,461 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 329 selfloop transitions, 92 changer transitions 0/429 dead transitions. [2024-06-27 19:27:11,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 429 transitions, 6556 flow [2024-06-27 19:27:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:27:11,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:27:11,462 INFO L175 Difference]: Start difference. First operand has 332 places, 405 transitions, 5427 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:27:11,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 429 transitions, 6556 flow [2024-06-27 19:27:13,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 429 transitions, 6318 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:13,160 INFO L231 Difference]: Finished difference. Result has 335 places, 411 transitions, 5465 flow [2024-06-27 19:27:13,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5465, PETRI_PLACES=335, PETRI_TRANSITIONS=411} [2024-06-27 19:27:13,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-27 19:27:13,161 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 411 transitions, 5465 flow [2024-06-27 19:27:13,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:13,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:13,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:13,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:27:13,161 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:13,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:13,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1920331175, now seen corresponding path program 5 times [2024-06-27 19:27:13,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:13,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494711860] [2024-06-27 19:27:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:13,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:13,227 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 19:27:13,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:13,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494711860] [2024-06-27 19:27:13,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494711860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:13,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:13,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:13,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423345733] [2024-06-27 19:27:13,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:13,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:13,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:13,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:13,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:13,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:13,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 411 transitions, 5465 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:13,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:13,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:13,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:14,072 INFO L124 PetriNetUnfolderBase]: 3177/5400 cut-off events. [2024-06-27 19:27:14,072 INFO L125 PetriNetUnfolderBase]: For 393859/393859 co-relation queries the response was YES. [2024-06-27 19:27:14,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36888 conditions, 5400 events. 3177/5400 cut-off events. For 393859/393859 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 36864 event pairs, 663 based on Foata normal form. 1/5393 useless extension candidates. Maximal degree in co-relation 36733. Up to 4706 conditions per place. [2024-06-27 19:27:14,140 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 332 selfloop transitions, 100 changer transitions 0/440 dead transitions. [2024-06-27 19:27:14,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 440 transitions, 6867 flow [2024-06-27 19:27:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:27:14,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:27:14,141 INFO L175 Difference]: Start difference. First operand has 335 places, 411 transitions, 5465 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:27:14,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 440 transitions, 6867 flow [2024-06-27 19:27:15,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 440 transitions, 6601 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:15,715 INFO L231 Difference]: Finished difference. Result has 339 places, 424 transitions, 5584 flow [2024-06-27 19:27:15,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5230, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5584, PETRI_PLACES=339, PETRI_TRANSITIONS=424} [2024-06-27 19:27:15,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-27 19:27:15,715 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 424 transitions, 5584 flow [2024-06-27 19:27:15,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:15,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:15,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:15,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:27:15,715 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:15,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash 698538039, now seen corresponding path program 8 times [2024-06-27 19:27:15,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:15,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821817121] [2024-06-27 19:27:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:15,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:15,785 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 19:27:15,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:15,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821817121] [2024-06-27 19:27:15,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821817121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:15,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:15,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:15,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668769158] [2024-06-27 19:27:15,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:15,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:15,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:15,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:15,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:15,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:15,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 424 transitions, 5584 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:15,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:15,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:15,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:16,802 INFO L124 PetriNetUnfolderBase]: 3190/5425 cut-off events. [2024-06-27 19:27:16,802 INFO L125 PetriNetUnfolderBase]: For 406862/406865 co-relation queries the response was YES. [2024-06-27 19:27:16,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37031 conditions, 5425 events. 3190/5425 cut-off events. For 406862/406865 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37001 event pairs, 662 based on Foata normal form. 3/5417 useless extension candidates. Maximal degree in co-relation 36875. Up to 4708 conditions per place. [2024-06-27 19:27:16,862 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 316 selfloop transitions, 131 changer transitions 0/455 dead transitions. [2024-06-27 19:27:16,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 455 transitions, 6970 flow [2024-06-27 19:27:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:27:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:27:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-27 19:27:16,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-27 19:27:16,863 INFO L175 Difference]: Start difference. First operand has 339 places, 424 transitions, 5584 flow. Second operand 10 states and 236 transitions. [2024-06-27 19:27:16,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 455 transitions, 6970 flow [2024-06-27 19:27:18,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 455 transitions, 6826 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:27:18,572 INFO L231 Difference]: Finished difference. Result has 347 places, 430 transitions, 5812 flow [2024-06-27 19:27:18,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5812, PETRI_PLACES=347, PETRI_TRANSITIONS=430} [2024-06-27 19:27:18,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-27 19:27:18,573 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 430 transitions, 5812 flow [2024-06-27 19:27:18,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:18,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:18,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:18,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:27:18,574 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:18,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:18,574 INFO L85 PathProgramCache]: Analyzing trace with hash -965903973, now seen corresponding path program 9 times [2024-06-27 19:27:18,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:18,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163053562] [2024-06-27 19:27:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:18,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:18,642 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 19:27:18,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:18,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163053562] [2024-06-27 19:27:18,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163053562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:18,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:18,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:18,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367962299] [2024-06-27 19:27:18,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:18,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:18,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:18,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:18,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:18,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:18,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 430 transitions, 5812 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:18,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:18,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:18,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:19,566 INFO L124 PetriNetUnfolderBase]: 3187/5433 cut-off events. [2024-06-27 19:27:19,567 INFO L125 PetriNetUnfolderBase]: For 411643/411646 co-relation queries the response was YES. [2024-06-27 19:27:19,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37167 conditions, 5433 events. 3187/5433 cut-off events. For 411643/411646 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37130 event pairs, 672 based on Foata normal form. 3/5425 useless extension candidates. Maximal degree in co-relation 37009. Up to 4705 conditions per place. [2024-06-27 19:27:19,637 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 314 selfloop transitions, 130 changer transitions 0/452 dead transitions. [2024-06-27 19:27:19,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 452 transitions, 6928 flow [2024-06-27 19:27:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:19,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:27:19,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:27:19,638 INFO L175 Difference]: Start difference. First operand has 347 places, 430 transitions, 5812 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:27:19,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 452 transitions, 6928 flow [2024-06-27 19:27:21,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 452 transitions, 6648 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:21,681 INFO L231 Difference]: Finished difference. Result has 350 places, 430 transitions, 5798 flow [2024-06-27 19:27:21,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5532, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5798, PETRI_PLACES=350, PETRI_TRANSITIONS=430} [2024-06-27 19:27:21,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-27 19:27:21,681 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 430 transitions, 5798 flow [2024-06-27 19:27:21,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:21,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:21,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:21,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:27:21,682 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:21,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash -54270463, now seen corresponding path program 6 times [2024-06-27 19:27:21,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:21,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274659601] [2024-06-27 19:27:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:21,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274659601] [2024-06-27 19:27:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274659601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:21,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:21,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:21,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62649690] [2024-06-27 19:27:21,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:21,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:21,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:21,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:21,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:21,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 430 transitions, 5798 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:21,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:21,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:21,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:22,728 INFO L124 PetriNetUnfolderBase]: 3184/5426 cut-off events. [2024-06-27 19:27:22,729 INFO L125 PetriNetUnfolderBase]: For 415801/415801 co-relation queries the response was YES. [2024-06-27 19:27:22,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37125 conditions, 5426 events. 3184/5426 cut-off events. For 415801/415801 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37126 event pairs, 673 based on Foata normal form. 1/5419 useless extension candidates. Maximal degree in co-relation 36966. Up to 4717 conditions per place. [2024-06-27 19:27:22,793 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 332 selfloop transitions, 105 changer transitions 0/445 dead transitions. [2024-06-27 19:27:22,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 445 transitions, 6884 flow [2024-06-27 19:27:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:27:22,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:27:22,794 INFO L175 Difference]: Start difference. First operand has 350 places, 430 transitions, 5798 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:27:22,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 445 transitions, 6884 flow [2024-06-27 19:27:24,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 445 transitions, 6616 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:27:24,713 INFO L231 Difference]: Finished difference. Result has 350 places, 430 transitions, 5746 flow [2024-06-27 19:27:24,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5530, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5746, PETRI_PLACES=350, PETRI_TRANSITIONS=430} [2024-06-27 19:27:24,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-27 19:27:24,714 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 430 transitions, 5746 flow [2024-06-27 19:27:24,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:24,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:24,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:24,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:27:24,714 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:24,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash 579696861, now seen corresponding path program 7 times [2024-06-27 19:27:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:24,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767234652] [2024-06-27 19:27:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:24,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:24,784 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 19:27:24,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:24,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767234652] [2024-06-27 19:27:24,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767234652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:24,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:24,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:24,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891525285] [2024-06-27 19:27:24,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:24,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:24,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:24,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:24,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:24,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:24,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 430 transitions, 5746 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:24,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:24,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:24,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:25,667 INFO L124 PetriNetUnfolderBase]: 3189/5436 cut-off events. [2024-06-27 19:27:25,668 INFO L125 PetriNetUnfolderBase]: For 426401/426404 co-relation queries the response was YES. [2024-06-27 19:27:25,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37209 conditions, 5436 events. 3189/5436 cut-off events. For 426401/426404 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 37317 event pairs, 718 based on Foata normal form. 3/5428 useless extension candidates. Maximal degree in co-relation 37049. Up to 4723 conditions per place. [2024-06-27 19:27:25,739 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 326 selfloop transitions, 110 changer transitions 0/444 dead transitions. [2024-06-27 19:27:25,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 444 transitions, 6861 flow [2024-06-27 19:27:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:27:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:27:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:27:25,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-27 19:27:25,740 INFO L175 Difference]: Start difference. First operand has 350 places, 430 transitions, 5746 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:27:25,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 444 transitions, 6861 flow [2024-06-27 19:27:27,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 444 transitions, 6681 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:27,704 INFO L231 Difference]: Finished difference. Result has 352 places, 433 transitions, 5831 flow [2024-06-27 19:27:27,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5831, PETRI_PLACES=352, PETRI_TRANSITIONS=433} [2024-06-27 19:27:27,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-27 19:27:27,705 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 433 transitions, 5831 flow [2024-06-27 19:27:27,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:27,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:27,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:27:27,705 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:27,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash 203799975, now seen corresponding path program 10 times [2024-06-27 19:27:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:27,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640716106] [2024-06-27 19:27:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:27,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:27,785 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 19:27:27,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:27,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640716106] [2024-06-27 19:27:27,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640716106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:27,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:27,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:27,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893651775] [2024-06-27 19:27:27,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:27,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:27,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:27,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:27,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:27,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 433 transitions, 5831 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:27,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:27,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:27,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:28,816 INFO L124 PetriNetUnfolderBase]: 3204/5456 cut-off events. [2024-06-27 19:27:28,817 INFO L125 PetriNetUnfolderBase]: For 434296/434296 co-relation queries the response was YES. [2024-06-27 19:27:28,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37500 conditions, 5456 events. 3204/5456 cut-off events. For 434296/434296 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 37253 event pairs, 643 based on Foata normal form. 1/5453 useless extension candidates. Maximal degree in co-relation 37339. Up to 4928 conditions per place. [2024-06-27 19:27:28,883 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 414 selfloop transitions, 38 changer transitions 0/460 dead transitions. [2024-06-27 19:27:28,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 460 transitions, 6924 flow [2024-06-27 19:27:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 19:27:28,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-27 19:27:28,884 INFO L175 Difference]: Start difference. First operand has 352 places, 433 transitions, 5831 flow. Second operand 8 states and 187 transitions. [2024-06-27 19:27:28,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 460 transitions, 6924 flow [2024-06-27 19:27:30,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 460 transitions, 6677 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:30,524 INFO L231 Difference]: Finished difference. Result has 357 places, 442 transitions, 5827 flow [2024-06-27 19:27:30,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5827, PETRI_PLACES=357, PETRI_TRANSITIONS=442} [2024-06-27 19:27:30,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-27 19:27:30,524 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 442 transitions, 5827 flow [2024-06-27 19:27:30,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:30,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:30,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:30,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:27:30,524 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:30,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1485777575, now seen corresponding path program 11 times [2024-06-27 19:27:30,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:30,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313355319] [2024-06-27 19:27:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:30,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:30,596 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 19:27:30,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:30,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313355319] [2024-06-27 19:27:30,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313355319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:30,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:30,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:30,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574811558] [2024-06-27 19:27:30,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:30,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:30,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:30,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:30,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:30,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 442 transitions, 5827 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:30,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:30,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:30,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:31,524 INFO L124 PetriNetUnfolderBase]: 3235/5504 cut-off events. [2024-06-27 19:27:31,524 INFO L125 PetriNetUnfolderBase]: For 451847/451850 co-relation queries the response was YES. [2024-06-27 19:27:31,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37952 conditions, 5504 events. 3235/5504 cut-off events. For 451847/451850 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 37689 event pairs, 663 based on Foata normal form. 3/5496 useless extension candidates. Maximal degree in co-relation 37790. Up to 4731 conditions per place. [2024-06-27 19:27:31,597 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 307 selfloop transitions, 164 changer transitions 0/479 dead transitions. [2024-06-27 19:27:31,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 479 transitions, 7598 flow [2024-06-27 19:27:31,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:27:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:27:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:27:31,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-27 19:27:31,598 INFO L175 Difference]: Start difference. First operand has 357 places, 442 transitions, 5827 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:27:31,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 479 transitions, 7598 flow [2024-06-27 19:27:33,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 479 transitions, 7497 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 19:27:33,662 INFO L231 Difference]: Finished difference. Result has 365 places, 457 transitions, 6351 flow [2024-06-27 19:27:33,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5726, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6351, PETRI_PLACES=365, PETRI_TRANSITIONS=457} [2024-06-27 19:27:33,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-27 19:27:33,662 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 457 transitions, 6351 flow [2024-06-27 19:27:33,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:33,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:33,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:33,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:27:33,663 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:33,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:33,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1973770923, now seen corresponding path program 8 times [2024-06-27 19:27:33,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:33,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308581906] [2024-06-27 19:27:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:33,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:33,729 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 19:27:33,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:33,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308581906] [2024-06-27 19:27:33,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308581906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:33,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:33,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:33,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934251783] [2024-06-27 19:27:33,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:33,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:33,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:33,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:33,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 457 transitions, 6351 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:33,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:33,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:33,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:34,676 INFO L124 PetriNetUnfolderBase]: 3240/5510 cut-off events. [2024-06-27 19:27:34,676 INFO L125 PetriNetUnfolderBase]: For 462128/462128 co-relation queries the response was YES. [2024-06-27 19:27:34,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38474 conditions, 5510 events. 3240/5510 cut-off events. For 462128/462128 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37789 event pairs, 664 based on Foata normal form. 1/5503 useless extension candidates. Maximal degree in co-relation 38310. Up to 4779 conditions per place. [2024-06-27 19:27:34,745 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 340 selfloop transitions, 126 changer transitions 0/474 dead transitions. [2024-06-27 19:27:34,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 474 transitions, 7540 flow [2024-06-27 19:27:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:27:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:27:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:27:34,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 19:27:34,746 INFO L175 Difference]: Start difference. First operand has 365 places, 457 transitions, 6351 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:27:34,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 474 transitions, 7540 flow [2024-06-27 19:27:37,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 474 transitions, 7277 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:37,382 INFO L231 Difference]: Finished difference. Result has 367 places, 460 transitions, 6389 flow [2024-06-27 19:27:37,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6094, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6389, PETRI_PLACES=367, PETRI_TRANSITIONS=460} [2024-06-27 19:27:37,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-27 19:27:37,383 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 460 transitions, 6389 flow [2024-06-27 19:27:37,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:37,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:37,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:37,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:27:37,383 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:37,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash -673804435, now seen corresponding path program 12 times [2024-06-27 19:27:37,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:37,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442515051] [2024-06-27 19:27:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:37,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:37,455 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 19:27:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:37,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442515051] [2024-06-27 19:27:37,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442515051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:37,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:37,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885778012] [2024-06-27 19:27:37,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:37,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:37,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:37,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:37,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 460 transitions, 6389 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:37,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:37,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:37,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:38,426 INFO L124 PetriNetUnfolderBase]: 3237/5508 cut-off events. [2024-06-27 19:27:38,427 INFO L125 PetriNetUnfolderBase]: For 467913/467916 co-relation queries the response was YES. [2024-06-27 19:27:38,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38353 conditions, 5508 events. 3237/5508 cut-off events. For 467913/467916 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37682 event pairs, 664 based on Foata normal form. 3/5499 useless extension candidates. Maximal degree in co-relation 38190. Up to 4734 conditions per place. [2024-06-27 19:27:38,500 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 307 selfloop transitions, 168 changer transitions 0/483 dead transitions. [2024-06-27 19:27:38,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 483 transitions, 7765 flow [2024-06-27 19:27:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:27:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:27:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-27 19:27:38,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587583148558758 [2024-06-27 19:27:38,501 INFO L175 Difference]: Start difference. First operand has 367 places, 460 transitions, 6389 flow. Second operand 11 states and 252 transitions. [2024-06-27 19:27:38,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 483 transitions, 7765 flow [2024-06-27 19:27:40,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 483 transitions, 7366 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:27:40,495 INFO L231 Difference]: Finished difference. Result has 372 places, 460 transitions, 6336 flow [2024-06-27 19:27:40,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5994, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6336, PETRI_PLACES=372, PETRI_TRANSITIONS=460} [2024-06-27 19:27:40,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-27 19:27:40,495 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 460 transitions, 6336 flow [2024-06-27 19:27:40,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:40,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:40,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:40,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:27:40,496 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:40,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:40,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1654827327, now seen corresponding path program 9 times [2024-06-27 19:27:40,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:40,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767656109] [2024-06-27 19:27:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:40,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:40,565 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 19:27:40,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:40,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767656109] [2024-06-27 19:27:40,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767656109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:40,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:40,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:40,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345456910] [2024-06-27 19:27:40,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:40,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:40,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:40,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:40,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:40,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:40,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 460 transitions, 6336 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:40,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:40,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:40,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:41,508 INFO L124 PetriNetUnfolderBase]: 3234/5502 cut-off events. [2024-06-27 19:27:41,509 INFO L125 PetriNetUnfolderBase]: For 462398/462398 co-relation queries the response was YES. [2024-06-27 19:27:41,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38218 conditions, 5502 events. 3234/5502 cut-off events. For 462398/462398 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37747 event pairs, 664 based on Foata normal form. 1/5495 useless extension candidates. Maximal degree in co-relation 38055. Up to 4772 conditions per place. [2024-06-27 19:27:41,579 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 347 selfloop transitions, 121 changer transitions 0/476 dead transitions. [2024-06-27 19:27:41,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 476 transitions, 7312 flow [2024-06-27 19:27:41,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:27:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:27:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:27:41,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-27 19:27:41,580 INFO L175 Difference]: Start difference. First operand has 372 places, 460 transitions, 6336 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:27:41,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 476 transitions, 7312 flow [2024-06-27 19:27:43,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 476 transitions, 6946 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 19:27:43,951 INFO L231 Difference]: Finished difference. Result has 368 places, 460 transitions, 6231 flow [2024-06-27 19:27:43,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6231, PETRI_PLACES=368, PETRI_TRANSITIONS=460} [2024-06-27 19:27:43,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-27 19:27:43,952 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 460 transitions, 6231 flow [2024-06-27 19:27:43,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:27:43,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:43,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:43,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:27:43,953 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:43,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:43,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1462443269, now seen corresponding path program 1 times [2024-06-27 19:27:43,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:43,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31456262] [2024-06-27 19:27:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:43,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:44,033 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 19:27:44,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31456262] [2024-06-27 19:27:44,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31456262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:44,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:44,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:44,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004260944] [2024-06-27 19:27:44,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:44,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:44,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:44,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:44,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:44,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:44,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 460 transitions, 6231 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:44,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:44,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:44,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:45,005 INFO L124 PetriNetUnfolderBase]: 3327/5641 cut-off events. [2024-06-27 19:27:45,006 INFO L125 PetriNetUnfolderBase]: For 542359/542362 co-relation queries the response was YES. [2024-06-27 19:27:45,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40928 conditions, 5641 events. 3327/5641 cut-off events. For 542359/542362 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38680 event pairs, 682 based on Foata normal form. 2/5622 useless extension candidates. Maximal degree in co-relation 40764. Up to 4799 conditions per place. [2024-06-27 19:27:45,084 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 355 selfloop transitions, 138 changer transitions 0/501 dead transitions. [2024-06-27 19:27:45,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 501 transitions, 7740 flow [2024-06-27 19:27:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:27:45,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-27 19:27:45,084 INFO L175 Difference]: Start difference. First operand has 368 places, 460 transitions, 6231 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:27:45,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 501 transitions, 7740 flow [2024-06-27 19:27:47,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 501 transitions, 7453 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:27:47,072 INFO L231 Difference]: Finished difference. Result has 370 places, 468 transitions, 6488 flow [2024-06-27 19:27:47,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5948, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6488, PETRI_PLACES=370, PETRI_TRANSITIONS=468} [2024-06-27 19:27:47,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-27 19:27:47,073 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 468 transitions, 6488 flow [2024-06-27 19:27:47,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:47,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:47,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:47,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:27:47,073 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:47,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:47,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1163063193, now seen corresponding path program 2 times [2024-06-27 19:27:47,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:47,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207714521] [2024-06-27 19:27:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:47,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:47,150 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 19:27:47,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:47,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207714521] [2024-06-27 19:27:47,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207714521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:47,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:47,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:47,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119934465] [2024-06-27 19:27:47,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:47,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:47,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:47,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:47,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 468 transitions, 6488 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:47,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:47,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:47,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:48,136 INFO L124 PetriNetUnfolderBase]: 3322/5640 cut-off events. [2024-06-27 19:27:48,136 INFO L125 PetriNetUnfolderBase]: For 524929/524932 co-relation queries the response was YES. [2024-06-27 19:27:48,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40865 conditions, 5640 events. 3322/5640 cut-off events. For 524929/524932 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38716 event pairs, 689 based on Foata normal form. 2/5630 useless extension candidates. Maximal degree in co-relation 40701. Up to 4891 conditions per place. [2024-06-27 19:27:48,211 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 131 changer transitions 0/493 dead transitions. [2024-06-27 19:27:48,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 493 transitions, 7520 flow [2024-06-27 19:27:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:27:48,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:27:48,212 INFO L175 Difference]: Start difference. First operand has 370 places, 468 transitions, 6488 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:27:48,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 493 transitions, 7520 flow [2024-06-27 19:27:50,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 493 transitions, 7219 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:50,654 INFO L231 Difference]: Finished difference. Result has 373 places, 468 transitions, 6454 flow [2024-06-27 19:27:50,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6187, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6454, PETRI_PLACES=373, PETRI_TRANSITIONS=468} [2024-06-27 19:27:50,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-27 19:27:50,655 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 468 transitions, 6454 flow [2024-06-27 19:27:50,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:50,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:50,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:50,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:27:50,655 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:50,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:50,655 INFO L85 PathProgramCache]: Analyzing trace with hash -965896037, now seen corresponding path program 3 times [2024-06-27 19:27:50,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:50,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114980853] [2024-06-27 19:27:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:50,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:50,741 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 19:27:50,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:50,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114980853] [2024-06-27 19:27:50,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114980853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:50,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:50,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:50,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582501444] [2024-06-27 19:27:50,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:50,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:50,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:50,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:50,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:50,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:50,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 468 transitions, 6454 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:50,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:50,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:50,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:51,731 INFO L124 PetriNetUnfolderBase]: 3317/5637 cut-off events. [2024-06-27 19:27:51,731 INFO L125 PetriNetUnfolderBase]: For 525822/525825 co-relation queries the response was YES. [2024-06-27 19:27:51,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40587 conditions, 5637 events. 3317/5637 cut-off events. For 525822/525825 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38627 event pairs, 669 based on Foata normal form. 4/5633 useless extension candidates. Maximal degree in co-relation 40422. Up to 5040 conditions per place. [2024-06-27 19:27:51,808 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 418 selfloop transitions, 64 changer transitions 0/490 dead transitions. [2024-06-27 19:27:51,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 490 transitions, 7472 flow [2024-06-27 19:27:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:27:51,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-27 19:27:51,809 INFO L175 Difference]: Start difference. First operand has 373 places, 468 transitions, 6454 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:27:51,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 490 transitions, 7472 flow [2024-06-27 19:27:54,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 490 transitions, 7173 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:27:54,186 INFO L231 Difference]: Finished difference. Result has 375 places, 468 transitions, 6288 flow [2024-06-27 19:27:54,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6155, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6288, PETRI_PLACES=375, PETRI_TRANSITIONS=468} [2024-06-27 19:27:54,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-27 19:27:54,186 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 468 transitions, 6288 flow [2024-06-27 19:27:54,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:54,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:54,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:54,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:27:54,187 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:54,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1753770139, now seen corresponding path program 4 times [2024-06-27 19:27:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:54,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441027160] [2024-06-27 19:27:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:54,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:54,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:54,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441027160] [2024-06-27 19:27:54,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441027160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:54,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:54,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:54,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798577964] [2024-06-27 19:27:54,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:54,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:54,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:54,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:54,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 468 transitions, 6288 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:54,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:54,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:54,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:55,276 INFO L124 PetriNetUnfolderBase]: 3325/5645 cut-off events. [2024-06-27 19:27:55,276 INFO L125 PetriNetUnfolderBase]: For 536207/536210 co-relation queries the response was YES. [2024-06-27 19:27:55,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40584 conditions, 5645 events. 3325/5645 cut-off events. For 536207/536210 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 38688 event pairs, 667 based on Foata normal form. 4/5641 useless extension candidates. Maximal degree in co-relation 40418. Up to 5046 conditions per place. [2024-06-27 19:27:55,356 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 412 selfloop transitions, 70 changer transitions 0/490 dead transitions. [2024-06-27 19:27:55,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 490 transitions, 7367 flow [2024-06-27 19:27:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:27:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:27:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-27 19:27:55,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-27 19:27:55,357 INFO L175 Difference]: Start difference. First operand has 375 places, 468 transitions, 6288 flow. Second operand 9 states and 206 transitions. [2024-06-27 19:27:55,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 490 transitions, 7367 flow [2024-06-27 19:27:57,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 490 transitions, 7198 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:27:57,951 INFO L231 Difference]: Finished difference. Result has 378 places, 470 transitions, 6335 flow [2024-06-27 19:27:57,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6335, PETRI_PLACES=378, PETRI_TRANSITIONS=470} [2024-06-27 19:27:57,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-27 19:27:57,952 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 470 transitions, 6335 flow [2024-06-27 19:27:57,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:57,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:57,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:57,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:27:57,952 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:57,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:57,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1012278561, now seen corresponding path program 13 times [2024-06-27 19:27:57,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:57,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662406120] [2024-06-27 19:27:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:57,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:58,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:58,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662406120] [2024-06-27 19:27:58,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662406120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:58,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:58,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:58,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275346037] [2024-06-27 19:27:58,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:58,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:58,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:58,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:58,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:58,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:58,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 470 transitions, 6335 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:27:58,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:58,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:58,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:59,020 INFO L124 PetriNetUnfolderBase]: 3346/5672 cut-off events. [2024-06-27 19:27:59,020 INFO L125 PetriNetUnfolderBase]: For 551633/551633 co-relation queries the response was YES. [2024-06-27 19:27:59,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41127 conditions, 5672 events. 3346/5672 cut-off events. For 551633/551633 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 38985 event pairs, 677 based on Foata normal form. 1/5665 useless extension candidates. Maximal degree in co-relation 40960. Up to 4534 conditions per place. [2024-06-27 19:27:59,098 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 276 selfloop transitions, 219 changer transitions 0/503 dead transitions. [2024-06-27 19:27:59,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 503 transitions, 7923 flow [2024-06-27 19:27:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:27:59,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:27:59,099 INFO L175 Difference]: Start difference. First operand has 378 places, 470 transitions, 6335 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:27:59,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 503 transitions, 7923 flow [2024-06-27 19:28:01,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 503 transitions, 7734 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 19:28:01,925 INFO L231 Difference]: Finished difference. Result has 379 places, 477 transitions, 6742 flow [2024-06-27 19:28:01,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6146, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6742, PETRI_PLACES=379, PETRI_TRANSITIONS=477} [2024-06-27 19:28:01,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-27 19:28:01,926 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 477 transitions, 6742 flow [2024-06-27 19:28:01,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:01,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:01,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:01,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:28:01,926 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:01,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:01,927 INFO L85 PathProgramCache]: Analyzing trace with hash 746217831, now seen corresponding path program 14 times [2024-06-27 19:28:01,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:01,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954262688] [2024-06-27 19:28:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:01,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:01,996 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 19:28:01,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:01,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954262688] [2024-06-27 19:28:01,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954262688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:01,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:01,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:01,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747376366] [2024-06-27 19:28:01,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:01,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:01,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:01,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:01,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:02,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:02,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 477 transitions, 6742 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:02,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:02,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:02,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:03,005 INFO L124 PetriNetUnfolderBase]: 3375/5730 cut-off events. [2024-06-27 19:28:03,005 INFO L125 PetriNetUnfolderBase]: For 578240/578240 co-relation queries the response was YES. [2024-06-27 19:28:03,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42320 conditions, 5730 events. 3375/5730 cut-off events. For 578240/578240 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 39403 event pairs, 687 based on Foata normal form. 1/5723 useless extension candidates. Maximal degree in co-relation 42152. Up to 4559 conditions per place. [2024-06-27 19:28:03,085 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 219 changer transitions 0/515 dead transitions. [2024-06-27 19:28:03,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 515 transitions, 8818 flow [2024-06-27 19:28:03,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:28:03,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-27 19:28:03,086 INFO L175 Difference]: Start difference. First operand has 379 places, 477 transitions, 6742 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:28:03,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 515 transitions, 8818 flow [2024-06-27 19:28:06,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 515 transitions, 8377 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-27 19:28:06,090 INFO L231 Difference]: Finished difference. Result has 383 places, 487 transitions, 6963 flow [2024-06-27 19:28:06,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6334, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6963, PETRI_PLACES=383, PETRI_TRANSITIONS=487} [2024-06-27 19:28:06,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-27 19:28:06,090 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 487 transitions, 6963 flow [2024-06-27 19:28:06,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:06,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:06,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:06,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:28:06,091 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:06,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:06,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1864596697, now seen corresponding path program 15 times [2024-06-27 19:28:06,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:06,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991063324] [2024-06-27 19:28:06,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:06,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:06,159 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 19:28:06,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991063324] [2024-06-27 19:28:06,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991063324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:06,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:06,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:06,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751527133] [2024-06-27 19:28:06,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:06,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:06,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:06,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:06,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:06,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 487 transitions, 6963 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:06,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:06,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:06,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:07,254 INFO L124 PetriNetUnfolderBase]: 3380/5727 cut-off events. [2024-06-27 19:28:07,255 INFO L125 PetriNetUnfolderBase]: For 590088/590088 co-relation queries the response was YES. [2024-06-27 19:28:07,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42377 conditions, 5727 events. 3380/5727 cut-off events. For 590088/590088 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 39311 event pairs, 677 based on Foata normal form. 1/5720 useless extension candidates. Maximal degree in co-relation 42208. Up to 4563 conditions per place. [2024-06-27 19:28:07,328 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 226 changer transitions 0/513 dead transitions. [2024-06-27 19:28:07,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 513 transitions, 8469 flow [2024-06-27 19:28:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:28:07,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:28:07,329 INFO L175 Difference]: Start difference. First operand has 383 places, 487 transitions, 6963 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:28:07,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 513 transitions, 8469 flow [2024-06-27 19:28:09,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 513 transitions, 8027 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 19:28:09,624 INFO L231 Difference]: Finished difference. Result has 387 places, 490 transitions, 7027 flow [2024-06-27 19:28:09,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6529, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7027, PETRI_PLACES=387, PETRI_TRANSITIONS=490} [2024-06-27 19:28:09,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-27 19:28:09,625 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 490 transitions, 7027 flow [2024-06-27 19:28:09,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:09,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:09,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:09,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:28:09,625 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:09,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:09,625 INFO L85 PathProgramCache]: Analyzing trace with hash 756693351, now seen corresponding path program 16 times [2024-06-27 19:28:09,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:09,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71210082] [2024-06-27 19:28:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:09,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:09,694 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 19:28:09,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:09,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71210082] [2024-06-27 19:28:09,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71210082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:09,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:09,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:09,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460963690] [2024-06-27 19:28:09,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:09,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:09,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:09,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:09,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:09,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:09,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 490 transitions, 7027 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:09,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:09,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:09,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:10,719 INFO L124 PetriNetUnfolderBase]: 3393/5761 cut-off events. [2024-06-27 19:28:10,719 INFO L125 PetriNetUnfolderBase]: For 606163/606163 co-relation queries the response was YES. [2024-06-27 19:28:10,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42748 conditions, 5761 events. 3393/5761 cut-off events. For 606163/606163 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 39680 event pairs, 687 based on Foata normal form. 1/5754 useless extension candidates. Maximal degree in co-relation 42578. Up to 4573 conditions per place. [2024-06-27 19:28:10,799 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 226 changer transitions 0/521 dead transitions. [2024-06-27 19:28:10,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 521 transitions, 9015 flow [2024-06-27 19:28:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:28:10,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:28:10,800 INFO L175 Difference]: Start difference. First operand has 387 places, 490 transitions, 7027 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:28:10,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 521 transitions, 9015 flow [2024-06-27 19:28:13,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 521 transitions, 8561 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:28:13,864 INFO L231 Difference]: Finished difference. Result has 390 places, 496 transitions, 7141 flow [2024-06-27 19:28:13,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6581, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7141, PETRI_PLACES=390, PETRI_TRANSITIONS=496} [2024-06-27 19:28:13,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-27 19:28:13,864 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 496 transitions, 7141 flow [2024-06-27 19:28:13,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:13,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:13,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:13,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:28:13,864 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:13,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:13,865 INFO L85 PathProgramCache]: Analyzing trace with hash 546916041, now seen corresponding path program 17 times [2024-06-27 19:28:13,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:13,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368488833] [2024-06-27 19:28:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:13,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:13,933 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 19:28:13,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:13,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368488833] [2024-06-27 19:28:13,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368488833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:13,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:13,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:13,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158894971] [2024-06-27 19:28:13,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:13,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:13,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:13,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:13,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 496 transitions, 7141 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:13,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:13,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:13,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:14,962 INFO L124 PetriNetUnfolderBase]: 3390/5749 cut-off events. [2024-06-27 19:28:14,962 INFO L125 PetriNetUnfolderBase]: For 612798/612798 co-relation queries the response was YES. [2024-06-27 19:28:15,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42701 conditions, 5749 events. 3390/5749 cut-off events. For 612798/612798 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 39536 event pairs, 679 based on Foata normal form. 1/5742 useless extension candidates. Maximal degree in co-relation 42530. Up to 4571 conditions per place. [2024-06-27 19:28:15,049 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 282 selfloop transitions, 233 changer transitions 0/523 dead transitions. [2024-06-27 19:28:15,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 523 transitions, 8837 flow [2024-06-27 19:28:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:28:15,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:28:15,050 INFO L175 Difference]: Start difference. First operand has 390 places, 496 transitions, 7141 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:28:15,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 523 transitions, 8837 flow [2024-06-27 19:28:18,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 523 transitions, 8370 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 19:28:18,081 INFO L231 Difference]: Finished difference. Result has 394 places, 496 transitions, 7146 flow [2024-06-27 19:28:18,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6674, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7146, PETRI_PLACES=394, PETRI_TRANSITIONS=496} [2024-06-27 19:28:18,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-27 19:28:18,081 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 496 transitions, 7146 flow [2024-06-27 19:28:18,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:18,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:18,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:18,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:28:18,081 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:18,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:18,082 INFO L85 PathProgramCache]: Analyzing trace with hash 547036011, now seen corresponding path program 18 times [2024-06-27 19:28:18,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:18,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175829276] [2024-06-27 19:28:18,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:18,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:18,159 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 19:28:18,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:18,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175829276] [2024-06-27 19:28:18,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175829276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:18,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:18,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809371127] [2024-06-27 19:28:18,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:18,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:18,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:18,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:18,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:18,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:18,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 496 transitions, 7146 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:18,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:18,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:18,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:19,219 INFO L124 PetriNetUnfolderBase]: 3395/5754 cut-off events. [2024-06-27 19:28:19,219 INFO L125 PetriNetUnfolderBase]: For 624795/624795 co-relation queries the response was YES. [2024-06-27 19:28:19,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42878 conditions, 5754 events. 3395/5754 cut-off events. For 624795/624795 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39548 event pairs, 679 based on Foata normal form. 1/5747 useless extension candidates. Maximal degree in co-relation 42706. Up to 5003 conditions per place. [2024-06-27 19:28:19,303 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 123 changer transitions 0/520 dead transitions. [2024-06-27 19:28:19,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 520 transitions, 8278 flow [2024-06-27 19:28:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:28:19,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:28:19,304 INFO L175 Difference]: Start difference. First operand has 394 places, 496 transitions, 7146 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:28:19,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 520 transitions, 8278 flow [2024-06-27 19:28:22,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 520 transitions, 7667 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 19:28:22,442 INFO L231 Difference]: Finished difference. Result has 393 places, 499 transitions, 6849 flow [2024-06-27 19:28:22,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6849, PETRI_PLACES=393, PETRI_TRANSITIONS=499} [2024-06-27 19:28:22,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-27 19:28:22,442 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 499 transitions, 6849 flow [2024-06-27 19:28:22,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:22,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:22,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:22,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:28:22,443 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:22,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:22,443 INFO L85 PathProgramCache]: Analyzing trace with hash 556296021, now seen corresponding path program 19 times [2024-06-27 19:28:22,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:22,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636560397] [2024-06-27 19:28:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:22,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:22,515 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 19:28:22,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636560397] [2024-06-27 19:28:22,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636560397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:22,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:22,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:22,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182654338] [2024-06-27 19:28:22,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:22,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:22,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:22,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:22,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 499 transitions, 6849 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:22,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:22,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:22,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:23,571 INFO L124 PetriNetUnfolderBase]: 3392/5766 cut-off events. [2024-06-27 19:28:23,571 INFO L125 PetriNetUnfolderBase]: For 627813/627813 co-relation queries the response was YES. [2024-06-27 19:28:23,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42285 conditions, 5766 events. 3392/5766 cut-off events. For 627813/627813 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39824 event pairs, 691 based on Foata normal form. 1/5759 useless extension candidates. Maximal degree in co-relation 42114. Up to 4989 conditions per place. [2024-06-27 19:28:23,654 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 129 changer transitions 0/518 dead transitions. [2024-06-27 19:28:23,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 518 transitions, 8119 flow [2024-06-27 19:28:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:28:23,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-27 19:28:23,655 INFO L175 Difference]: Start difference. First operand has 393 places, 499 transitions, 6849 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:28:23,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 518 transitions, 8119 flow [2024-06-27 19:28:27,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 518 transitions, 7849 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:28:27,128 INFO L231 Difference]: Finished difference. Result has 395 places, 499 transitions, 6843 flow [2024-06-27 19:28:27,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6579, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6843, PETRI_PLACES=395, PETRI_TRANSITIONS=499} [2024-06-27 19:28:27,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-27 19:28:27,128 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 499 transitions, 6843 flow [2024-06-27 19:28:27,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:27,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:27,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:27,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:28:27,129 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:27,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:27,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1083495131, now seen corresponding path program 20 times [2024-06-27 19:28:27,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:27,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735601527] [2024-06-27 19:28:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:27,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:27,200 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 19:28:27,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:27,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735601527] [2024-06-27 19:28:27,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735601527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:27,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:27,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:27,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246122033] [2024-06-27 19:28:27,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:27,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:27,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:27,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:27,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:27,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:27,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 499 transitions, 6843 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:27,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:27,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:27,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:28,306 INFO L124 PetriNetUnfolderBase]: 3410/5797 cut-off events. [2024-06-27 19:28:28,306 INFO L125 PetriNetUnfolderBase]: For 649583/649583 co-relation queries the response was YES. [2024-06-27 19:28:28,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42653 conditions, 5797 events. 3410/5797 cut-off events. For 649583/649583 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40074 event pairs, 690 based on Foata normal form. 2/5791 useless extension candidates. Maximal degree in co-relation 42481. Up to 4592 conditions per place. [2024-06-27 19:28:28,385 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 285 selfloop transitions, 233 changer transitions 0/526 dead transitions. [2024-06-27 19:28:28,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 526 transitions, 8433 flow [2024-06-27 19:28:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:28:28,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:28:28,386 INFO L175 Difference]: Start difference. First operand has 395 places, 499 transitions, 6843 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:28:28,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 526 transitions, 8433 flow [2024-06-27 19:28:32,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 526 transitions, 8138 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:28:32,102 INFO L231 Difference]: Finished difference. Result has 398 places, 506 transitions, 7117 flow [2024-06-27 19:28:32,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7117, PETRI_PLACES=398, PETRI_TRANSITIONS=506} [2024-06-27 19:28:32,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-27 19:28:32,102 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 506 transitions, 7117 flow [2024-06-27 19:28:32,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:32,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:32,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:32,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:28:32,103 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:32,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash 871777131, now seen corresponding path program 21 times [2024-06-27 19:28:32,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:32,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47769688] [2024-06-27 19:28:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:32,177 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 19:28:32,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:32,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47769688] [2024-06-27 19:28:32,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47769688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:32,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:32,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:32,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449635973] [2024-06-27 19:28:32,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:32,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:32,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:32,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:32,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:32,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:32,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 506 transitions, 7117 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:32,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:32,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:32,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:33,258 INFO L124 PetriNetUnfolderBase]: 3407/5777 cut-off events. [2024-06-27 19:28:33,258 INFO L125 PetriNetUnfolderBase]: For 653821/653821 co-relation queries the response was YES. [2024-06-27 19:28:33,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42962 conditions, 5777 events. 3407/5777 cut-off events. For 653821/653821 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39795 event pairs, 679 based on Foata normal form. 1/5770 useless extension candidates. Maximal degree in co-relation 42789. Up to 5011 conditions per place. [2024-06-27 19:28:33,341 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 388 selfloop transitions, 130 changer transitions 0/526 dead transitions. [2024-06-27 19:28:33,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 526 transitions, 8201 flow [2024-06-27 19:28:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:28:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:28:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-27 19:28:33,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-27 19:28:33,342 INFO L175 Difference]: Start difference. First operand has 398 places, 506 transitions, 7117 flow. Second operand 10 states and 230 transitions. [2024-06-27 19:28:33,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 526 transitions, 8201 flow [2024-06-27 19:28:36,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 526 transitions, 7857 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:28:36,671 INFO L231 Difference]: Finished difference. Result has 404 places, 506 transitions, 7039 flow [2024-06-27 19:28:36,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6773, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7039, PETRI_PLACES=404, PETRI_TRANSITIONS=506} [2024-06-27 19:28:36,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-27 19:28:36,672 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 506 transitions, 7039 flow [2024-06-27 19:28:36,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:36,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:36,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:36,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:28:36,672 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:36,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:36,673 INFO L85 PathProgramCache]: Analyzing trace with hash 578644135, now seen corresponding path program 22 times [2024-06-27 19:28:36,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:36,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271294433] [2024-06-27 19:28:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:36,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:36,746 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 19:28:36,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:36,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271294433] [2024-06-27 19:28:36,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271294433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:36,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:36,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:36,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770458693] [2024-06-27 19:28:36,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:36,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:36,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:36,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:36,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:36,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:36,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 506 transitions, 7039 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:36,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:36,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:36,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:37,836 INFO L124 PetriNetUnfolderBase]: 3457/5860 cut-off events. [2024-06-27 19:28:37,836 INFO L125 PetriNetUnfolderBase]: For 699295/699295 co-relation queries the response was YES. [2024-06-27 19:28:37,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43774 conditions, 5860 events. 3457/5860 cut-off events. For 699295/699295 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40478 event pairs, 679 based on Foata normal form. 2/5854 useless extension candidates. Maximal degree in co-relation 43600. Up to 4972 conditions per place. [2024-06-27 19:28:37,922 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 378 selfloop transitions, 151 changer transitions 0/537 dead transitions. [2024-06-27 19:28:37,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 537 transitions, 8569 flow [2024-06-27 19:28:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:37,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:28:37,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-27 19:28:37,923 INFO L175 Difference]: Start difference. First operand has 404 places, 506 transitions, 7039 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:28:37,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 537 transitions, 8569 flow [2024-06-27 19:28:40,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 537 transitions, 8289 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 19:28:40,697 INFO L231 Difference]: Finished difference. Result has 404 places, 519 transitions, 7326 flow [2024-06-27 19:28:40,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7326, PETRI_PLACES=404, PETRI_TRANSITIONS=519} [2024-06-27 19:28:40,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-27 19:28:40,697 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 519 transitions, 7326 flow [2024-06-27 19:28:40,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:40,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:40,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:40,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:28:40,698 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:40,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:40,698 INFO L85 PathProgramCache]: Analyzing trace with hash 601303405, now seen corresponding path program 23 times [2024-06-27 19:28:40,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:40,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397734900] [2024-06-27 19:28:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:40,770 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 19:28:40,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:40,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397734900] [2024-06-27 19:28:40,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397734900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:40,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:40,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:40,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460785516] [2024-06-27 19:28:40,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:40,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:40,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:40,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:40,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:40,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 519 transitions, 7326 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:40,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:40,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:40,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:41,980 INFO L124 PetriNetUnfolderBase]: 3451/5852 cut-off events. [2024-06-27 19:28:41,980 INFO L125 PetriNetUnfolderBase]: For 701541/701541 co-relation queries the response was YES. [2024-06-27 19:28:42,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43859 conditions, 5852 events. 3451/5852 cut-off events. For 701541/701541 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40385 event pairs, 679 based on Foata normal form. 2/5846 useless extension candidates. Maximal degree in co-relation 43683. Up to 4967 conditions per place. [2024-06-27 19:28:42,064 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 374 selfloop transitions, 158 changer transitions 0/540 dead transitions. [2024-06-27 19:28:42,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 540 transitions, 8902 flow [2024-06-27 19:28:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:28:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:28:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-27 19:28:42,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780487804878048 [2024-06-27 19:28:42,065 INFO L175 Difference]: Start difference. First operand has 404 places, 519 transitions, 7326 flow. Second operand 10 states and 237 transitions. [2024-06-27 19:28:42,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 540 transitions, 8902 flow [2024-06-27 19:28:45,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 540 transitions, 8613 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:28:45,181 INFO L231 Difference]: Finished difference. Result has 410 places, 521 transitions, 7418 flow [2024-06-27 19:28:45,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7037, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7418, PETRI_PLACES=410, PETRI_TRANSITIONS=521} [2024-06-27 19:28:45,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-27 19:28:45,182 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 521 transitions, 7418 flow [2024-06-27 19:28:45,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:45,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:45,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:45,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:28:45,182 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:45,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:45,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1067297427, now seen corresponding path program 24 times [2024-06-27 19:28:45,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:45,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394859139] [2024-06-27 19:28:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:45,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:45,255 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 19:28:45,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:45,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394859139] [2024-06-27 19:28:45,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394859139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:45,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:45,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:45,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943925635] [2024-06-27 19:28:45,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:45,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:45,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:45,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:45,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:45,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:45,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 521 transitions, 7418 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:45,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:45,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:45,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:46,436 INFO L124 PetriNetUnfolderBase]: 3445/5844 cut-off events. [2024-06-27 19:28:46,436 INFO L125 PetriNetUnfolderBase]: For 702600/702600 co-relation queries the response was YES. [2024-06-27 19:28:46,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43737 conditions, 5844 events. 3445/5844 cut-off events. For 702600/702600 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40374 event pairs, 679 based on Foata normal form. 2/5838 useless extension candidates. Maximal degree in co-relation 43559. Up to 4962 conditions per place. [2024-06-27 19:28:46,522 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 372 selfloop transitions, 160 changer transitions 0/540 dead transitions. [2024-06-27 19:28:46,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 540 transitions, 8740 flow [2024-06-27 19:28:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:28:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:28:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-27 19:28:46,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-27 19:28:46,523 INFO L175 Difference]: Start difference. First operand has 410 places, 521 transitions, 7418 flow. Second operand 11 states and 253 transitions. [2024-06-27 19:28:46,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 540 transitions, 8740 flow [2024-06-27 19:28:49,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 540 transitions, 8346 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 19:28:49,716 INFO L231 Difference]: Finished difference. Result has 414 places, 521 transitions, 7351 flow [2024-06-27 19:28:49,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7351, PETRI_PLACES=414, PETRI_TRANSITIONS=521} [2024-06-27 19:28:49,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-27 19:28:49,717 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 521 transitions, 7351 flow [2024-06-27 19:28:49,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:49,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:49,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:49,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:28:49,717 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:49,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:49,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1814186405, now seen corresponding path program 25 times [2024-06-27 19:28:49,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:49,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391333212] [2024-06-27 19:28:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:49,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:49,787 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 19:28:49,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:49,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391333212] [2024-06-27 19:28:49,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391333212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:49,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:49,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:49,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903302271] [2024-06-27 19:28:49,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:49,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:49,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:49,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 521 transitions, 7351 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:49,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:49,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:49,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:50,930 INFO L124 PetriNetUnfolderBase]: 3439/5838 cut-off events. [2024-06-27 19:28:50,930 INFO L125 PetriNetUnfolderBase]: For 703002/703005 co-relation queries the response was YES. [2024-06-27 19:28:50,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43521 conditions, 5838 events. 3439/5838 cut-off events. For 703002/703005 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40286 event pairs, 679 based on Foata normal form. 4/5830 useless extension candidates. Maximal degree in co-relation 43342. Up to 4711 conditions per place. [2024-06-27 19:28:51,020 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 276 changer transitions 0/558 dead transitions. [2024-06-27 19:28:51,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 558 transitions, 9191 flow [2024-06-27 19:28:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:28:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:28:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 19:28:51,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-27 19:28:51,021 INFO L175 Difference]: Start difference. First operand has 414 places, 521 transitions, 7351 flow. Second operand 9 states and 240 transitions. [2024-06-27 19:28:51,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 558 transitions, 9191 flow [2024-06-27 19:28:54,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 558 transitions, 8821 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-27 19:28:54,816 INFO L231 Difference]: Finished difference. Result has 412 places, 521 transitions, 7552 flow [2024-06-27 19:28:54,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6981, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7552, PETRI_PLACES=412, PETRI_TRANSITIONS=521} [2024-06-27 19:28:54,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-27 19:28:54,817 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 521 transitions, 7552 flow [2024-06-27 19:28:54,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:54,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:54,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:54,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:28:54,817 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:54,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:54,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1797466841, now seen corresponding path program 26 times [2024-06-27 19:28:54,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:54,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394079460] [2024-06-27 19:28:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:54,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:54,888 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 19:28:54,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:54,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394079460] [2024-06-27 19:28:54,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394079460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:54,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:54,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:54,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756040521] [2024-06-27 19:28:54,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:54,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:54,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:54,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:54,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:54,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:54,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 521 transitions, 7552 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:54,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:54,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:54,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:56,081 INFO L124 PetriNetUnfolderBase]: 3433/5830 cut-off events. [2024-06-27 19:28:56,081 INFO L125 PetriNetUnfolderBase]: For 704327/704330 co-relation queries the response was YES. [2024-06-27 19:28:56,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43703 conditions, 5830 events. 3433/5830 cut-off events. For 704327/704330 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40235 event pairs, 679 based on Foata normal form. 4/5822 useless extension candidates. Maximal degree in co-relation 43523. Up to 4706 conditions per place. [2024-06-27 19:28:56,163 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 280 changer transitions 0/566 dead transitions. [2024-06-27 19:28:56,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 566 transitions, 9434 flow [2024-06-27 19:28:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:28:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:28:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 288 transitions. [2024-06-27 19:28:56,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385809312638581 [2024-06-27 19:28:56,164 INFO L175 Difference]: Start difference. First operand has 412 places, 521 transitions, 7552 flow. Second operand 11 states and 288 transitions. [2024-06-27 19:28:56,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 566 transitions, 9434 flow [2024-06-27 19:28:59,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 566 transitions, 8750 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-27 19:28:59,677 INFO L231 Difference]: Finished difference. Result has 413 places, 521 transitions, 7469 flow [2024-06-27 19:28:59,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6886, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7469, PETRI_PLACES=413, PETRI_TRANSITIONS=521} [2024-06-27 19:28:59,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-27 19:28:59,677 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 521 transitions, 7469 flow [2024-06-27 19:28:59,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:59,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:59,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:59,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:28:59,677 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:59,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:59,678 INFO L85 PathProgramCache]: Analyzing trace with hash -771931767, now seen corresponding path program 27 times [2024-06-27 19:28:59,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:59,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426749248] [2024-06-27 19:28:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:59,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:59,754 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 19:28:59,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:59,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426749248] [2024-06-27 19:28:59,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426749248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:59,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:59,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296363835] [2024-06-27 19:28:59,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:59,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:59,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:59,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:59,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:59,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 521 transitions, 7469 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:28:59,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:59,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:59,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:00,892 INFO L124 PetriNetUnfolderBase]: 3427/5828 cut-off events. [2024-06-27 19:29:00,892 INFO L125 PetriNetUnfolderBase]: For 666871/666871 co-relation queries the response was YES. [2024-06-27 19:29:00,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43190 conditions, 5828 events. 3427/5828 cut-off events. For 666871/666871 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40259 event pairs, 658 based on Foata normal form. 2/5826 useless extension candidates. Maximal degree in co-relation 43011. Up to 5214 conditions per place. [2024-06-27 19:29:00,976 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 484 selfloop transitions, 58 changer transitions 0/550 dead transitions. [2024-06-27 19:29:00,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 550 transitions, 8627 flow [2024-06-27 19:29:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:29:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:29:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:29:00,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-27 19:29:00,977 INFO L175 Difference]: Start difference. First operand has 413 places, 521 transitions, 7469 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:29:00,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 550 transitions, 8627 flow [2024-06-27 19:29:03,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 550 transitions, 8031 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-27 19:29:03,749 INFO L231 Difference]: Finished difference. Result has 408 places, 521 transitions, 7008 flow [2024-06-27 19:29:03,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6873, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7008, PETRI_PLACES=408, PETRI_TRANSITIONS=521} [2024-06-27 19:29:03,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-27 19:29:03,749 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 521 transitions, 7008 flow [2024-06-27 19:29:03,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:03,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:03,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:03,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:29:03,749 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:03,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:03,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1025306869, now seen corresponding path program 28 times [2024-06-27 19:29:03,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:03,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487166076] [2024-06-27 19:29:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:03,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:03,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:03,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487166076] [2024-06-27 19:29:03,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487166076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:03,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:03,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:03,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74525784] [2024-06-27 19:29:03,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:03,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:03,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:03,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:03,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:03,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 521 transitions, 7008 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:03,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:03,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:03,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:04,932 INFO L124 PetriNetUnfolderBase]: 3421/5812 cut-off events. [2024-06-27 19:29:04,932 INFO L125 PetriNetUnfolderBase]: For 619647/619647 co-relation queries the response was YES. [2024-06-27 19:29:04,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41968 conditions, 5812 events. 3421/5812 cut-off events. For 619647/619647 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40218 event pairs, 679 based on Foata normal form. 2/5806 useless extension candidates. Maximal degree in co-relation 41790. Up to 4696 conditions per place. [2024-06-27 19:29:05,020 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 314 selfloop transitions, 223 changer transitions 0/545 dead transitions. [2024-06-27 19:29:05,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 545 transitions, 8350 flow [2024-06-27 19:29:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:29:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:29:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:29:05,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-27 19:29:05,021 INFO L175 Difference]: Start difference. First operand has 408 places, 521 transitions, 7008 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:29:05,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 545 transitions, 8350 flow [2024-06-27 19:29:08,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 545 transitions, 8192 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 19:29:08,666 INFO L231 Difference]: Finished difference. Result has 409 places, 521 transitions, 7316 flow [2024-06-27 19:29:08,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6854, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7316, PETRI_PLACES=409, PETRI_TRANSITIONS=521} [2024-06-27 19:29:08,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-27 19:29:08,666 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 521 transitions, 7316 flow [2024-06-27 19:29:08,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:08,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:08,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:08,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:29:08,667 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:08,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:08,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1281807379, now seen corresponding path program 29 times [2024-06-27 19:29:08,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:08,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128564586] [2024-06-27 19:29:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:08,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:08,738 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 19:29:08,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:08,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128564586] [2024-06-27 19:29:08,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128564586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:08,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:08,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:08,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008482841] [2024-06-27 19:29:08,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:08,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:08,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:08,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:08,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:08,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 521 transitions, 7316 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:08,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:08,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:08,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:09,865 INFO L124 PetriNetUnfolderBase]: 3415/5812 cut-off events. [2024-06-27 19:29:09,865 INFO L125 PetriNetUnfolderBase]: For 599413/599413 co-relation queries the response was YES. [2024-06-27 19:29:09,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42095 conditions, 5812 events. 3415/5812 cut-off events. For 599413/599413 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40267 event pairs, 683 based on Foata normal form. 2/5806 useless extension candidates. Maximal degree in co-relation 41916. Up to 4691 conditions per place. [2024-06-27 19:29:09,945 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 299 selfloop transitions, 247 changer transitions 0/554 dead transitions. [2024-06-27 19:29:09,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 554 transitions, 8902 flow [2024-06-27 19:29:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:29:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:29:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 19:29:09,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6368563685636857 [2024-06-27 19:29:09,946 INFO L175 Difference]: Start difference. First operand has 409 places, 521 transitions, 7316 flow. Second operand 9 states and 235 transitions. [2024-06-27 19:29:09,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 554 transitions, 8902 flow [2024-06-27 19:29:12,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 554 transitions, 8292 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 19:29:12,641 INFO L231 Difference]: Finished difference. Result has 409 places, 521 transitions, 7228 flow [2024-06-27 19:29:12,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6714, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7228, PETRI_PLACES=409, PETRI_TRANSITIONS=521} [2024-06-27 19:29:12,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-27 19:29:12,642 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 521 transitions, 7228 flow [2024-06-27 19:29:12,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:12,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:12,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:12,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:29:12,642 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:12,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:12,643 INFO L85 PathProgramCache]: Analyzing trace with hash -762174501, now seen corresponding path program 30 times [2024-06-27 19:29:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:12,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743117035] [2024-06-27 19:29:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:12,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:12,715 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 19:29:12,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:12,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743117035] [2024-06-27 19:29:12,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743117035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:12,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:12,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:12,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302625349] [2024-06-27 19:29:12,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:12,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:12,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:12,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:12,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:12,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:12,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 521 transitions, 7228 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:12,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:12,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:12,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:13,845 INFO L124 PetriNetUnfolderBase]: 3409/5796 cut-off events. [2024-06-27 19:29:13,845 INFO L125 PetriNetUnfolderBase]: For 577822/577822 co-relation queries the response was YES. [2024-06-27 19:29:13,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41687 conditions, 5796 events. 3409/5796 cut-off events. For 577822/577822 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40114 event pairs, 679 based on Foata normal form. 2/5790 useless extension candidates. Maximal degree in co-relation 41508. Up to 4686 conditions per place. [2024-06-27 19:29:13,930 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 254 changer transitions 0/557 dead transitions. [2024-06-27 19:29:13,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 557 transitions, 8620 flow [2024-06-27 19:29:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:29:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:29:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 19:29:13,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:29:13,931 INFO L175 Difference]: Start difference. First operand has 409 places, 521 transitions, 7228 flow. Second operand 10 states and 255 transitions. [2024-06-27 19:29:13,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 557 transitions, 8620 flow [2024-06-27 19:29:17,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 557 transitions, 8028 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-27 19:29:17,380 INFO L231 Difference]: Finished difference. Result has 408 places, 521 transitions, 7174 flow [2024-06-27 19:29:17,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6642, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7174, PETRI_PLACES=408, PETRI_TRANSITIONS=521} [2024-06-27 19:29:17,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-27 19:29:17,381 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 521 transitions, 7174 flow [2024-06-27 19:29:17,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:17,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:17,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:17,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:29:17,381 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:17,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1857268731, now seen corresponding path program 5 times [2024-06-27 19:29:17,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:17,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047051165] [2024-06-27 19:29:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:17,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:17,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:17,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047051165] [2024-06-27 19:29:17,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047051165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:17,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:17,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:17,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362930057] [2024-06-27 19:29:17,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:17,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:17,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:17,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:17,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:17,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:17,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 521 transitions, 7174 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:17,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:17,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:17,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:18,639 INFO L124 PetriNetUnfolderBase]: 3594/6127 cut-off events. [2024-06-27 19:29:18,640 INFO L125 PetriNetUnfolderBase]: For 713984/713984 co-relation queries the response was YES. [2024-06-27 19:29:18,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47126 conditions, 6127 events. 3594/6127 cut-off events. For 713984/713984 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 42798 event pairs, 739 based on Foata normal form. 2/6124 useless extension candidates. Maximal degree in co-relation 46948. Up to 5095 conditions per place. [2024-06-27 19:29:18,731 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 425 selfloop transitions, 126 changer transitions 0/559 dead transitions. [2024-06-27 19:29:18,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 559 transitions, 8819 flow [2024-06-27 19:29:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:18,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:29:18,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-27 19:29:18,732 INFO L175 Difference]: Start difference. First operand has 408 places, 521 transitions, 7174 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:29:18,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 559 transitions, 8819 flow [2024-06-27 19:29:22,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 559 transitions, 8278 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-27 19:29:22,405 INFO L231 Difference]: Finished difference. Result has 404 places, 529 transitions, 7175 flow [2024-06-27 19:29:22,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6641, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7175, PETRI_PLACES=404, PETRI_TRANSITIONS=529} [2024-06-27 19:29:22,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-27 19:29:22,406 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 529 transitions, 7175 flow [2024-06-27 19:29:22,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:22,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:22,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:22,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:29:22,406 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:22,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:22,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1810700765, now seen corresponding path program 6 times [2024-06-27 19:29:22,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:22,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567280528] [2024-06-27 19:29:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:22,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:22,482 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 19:29:22,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:22,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567280528] [2024-06-27 19:29:22,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567280528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:22,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:22,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:22,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002946379] [2024-06-27 19:29:22,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:22,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:22,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:22,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:22,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 529 transitions, 7175 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:22,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:22,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:22,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:23,740 INFO L124 PetriNetUnfolderBase]: 3733/6343 cut-off events. [2024-06-27 19:29:23,741 INFO L125 PetriNetUnfolderBase]: For 787263/787263 co-relation queries the response was YES. [2024-06-27 19:29:23,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51016 conditions, 6343 events. 3733/6343 cut-off events. For 787263/787263 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 44374 event pairs, 771 based on Foata normal form. 2/6339 useless extension candidates. Maximal degree in co-relation 50840. Up to 5354 conditions per place. [2024-06-27 19:29:23,831 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 430 selfloop transitions, 129 changer transitions 0/567 dead transitions. [2024-06-27 19:29:23,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 567 transitions, 8846 flow [2024-06-27 19:29:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:29:23,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:29:23,833 INFO L175 Difference]: Start difference. First operand has 404 places, 529 transitions, 7175 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:29:23,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 567 transitions, 8846 flow [2024-06-27 19:29:27,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 567 transitions, 8555 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:29:27,186 INFO L231 Difference]: Finished difference. Result has 408 places, 537 transitions, 7439 flow [2024-06-27 19:29:27,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6884, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7439, PETRI_PLACES=408, PETRI_TRANSITIONS=537} [2024-06-27 19:29:27,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-27 19:29:27,186 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 537 transitions, 7439 flow [2024-06-27 19:29:27,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:27,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:27,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:27,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:29:27,187 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:27,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:27,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1854411771, now seen corresponding path program 7 times [2024-06-27 19:29:27,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:27,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695875481] [2024-06-27 19:29:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:27,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:27,264 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 19:29:27,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:27,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695875481] [2024-06-27 19:29:27,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695875481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:27,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:27,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:27,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004962000] [2024-06-27 19:29:27,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:27,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:27,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:27,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:27,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 537 transitions, 7439 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:27,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:27,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:27,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:28,502 INFO L124 PetriNetUnfolderBase]: 3741/6361 cut-off events. [2024-06-27 19:29:28,502 INFO L125 PetriNetUnfolderBase]: For 803600/803600 co-relation queries the response was YES. [2024-06-27 19:29:28,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51343 conditions, 6361 events. 3741/6361 cut-off events. For 803600/803600 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 44628 event pairs, 779 based on Foata normal form. 2/6358 useless extension candidates. Maximal degree in co-relation 51165. Up to 5515 conditions per place. [2024-06-27 19:29:28,600 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 119 changer transitions 0/561 dead transitions. [2024-06-27 19:29:28,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 561 transitions, 8654 flow [2024-06-27 19:29:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:29:28,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-27 19:29:28,601 INFO L175 Difference]: Start difference. First operand has 408 places, 537 transitions, 7439 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:29:28,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 561 transitions, 8654 flow [2024-06-27 19:29:32,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 561 transitions, 8340 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 19:29:32,027 INFO L231 Difference]: Finished difference. Result has 411 places, 539 transitions, 7427 flow [2024-06-27 19:29:32,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7125, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7427, PETRI_PLACES=411, PETRI_TRANSITIONS=539} [2024-06-27 19:29:32,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-27 19:29:32,028 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 539 transitions, 7427 flow [2024-06-27 19:29:32,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:32,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:32,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:32,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:29:32,028 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:32,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:32,028 INFO L85 PathProgramCache]: Analyzing trace with hash 818168189, now seen corresponding path program 8 times [2024-06-27 19:29:32,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:32,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617241065] [2024-06-27 19:29:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:32,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:32,106 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 19:29:32,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:32,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617241065] [2024-06-27 19:29:32,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617241065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:32,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:32,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:32,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205885093] [2024-06-27 19:29:32,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:32,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:32,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:32,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:32,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:32,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:32,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 539 transitions, 7427 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:32,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:32,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:32,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:33,338 INFO L124 PetriNetUnfolderBase]: 3736/6354 cut-off events. [2024-06-27 19:29:33,339 INFO L125 PetriNetUnfolderBase]: For 805666/805666 co-relation queries the response was YES. [2024-06-27 19:29:33,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50937 conditions, 6354 events. 3736/6354 cut-off events. For 805666/805666 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 44543 event pairs, 778 based on Foata normal form. 2/6351 useless extension candidates. Maximal degree in co-relation 50758. Up to 5508 conditions per place. [2024-06-27 19:29:33,438 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 431 selfloop transitions, 122 changer transitions 0/561 dead transitions. [2024-06-27 19:29:33,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 561 transitions, 8587 flow [2024-06-27 19:29:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:29:33,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:29:33,439 INFO L175 Difference]: Start difference. First operand has 411 places, 539 transitions, 7427 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:29:33,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 561 transitions, 8587 flow [2024-06-27 19:29:37,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 561 transitions, 8312 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:29:37,378 INFO L231 Difference]: Finished difference. Result has 413 places, 539 transitions, 7401 flow [2024-06-27 19:29:37,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7152, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7401, PETRI_PLACES=413, PETRI_TRANSITIONS=539} [2024-06-27 19:29:37,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-27 19:29:37,378 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 539 transitions, 7401 flow [2024-06-27 19:29:37,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:37,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:37,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:37,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:29:37,379 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:37,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash 871992457, now seen corresponding path program 9 times [2024-06-27 19:29:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:37,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544064593] [2024-06-27 19:29:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:37,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:37,467 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 19:29:37,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:37,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544064593] [2024-06-27 19:29:37,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544064593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:37,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:37,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:37,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550154626] [2024-06-27 19:29:37,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:37,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:37,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:37,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:37,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 539 transitions, 7401 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:37,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:37,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:37,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:38,738 INFO L124 PetriNetUnfolderBase]: 3744/6366 cut-off events. [2024-06-27 19:29:38,739 INFO L125 PetriNetUnfolderBase]: For 820303/820303 co-relation queries the response was YES. [2024-06-27 19:29:38,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51166 conditions, 6366 events. 3744/6366 cut-off events. For 820303/820303 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44642 event pairs, 778 based on Foata normal form. 2/6363 useless extension candidates. Maximal degree in co-relation 50986. Up to 5676 conditions per place. [2024-06-27 19:29:38,835 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 493 selfloop transitions, 59 changer transitions 0/560 dead transitions. [2024-06-27 19:29:38,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 560 transitions, 8617 flow [2024-06-27 19:29:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 19:29:38,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-27 19:29:38,836 INFO L175 Difference]: Start difference. First operand has 413 places, 539 transitions, 7401 flow. Second operand 8 states and 187 transitions. [2024-06-27 19:29:38,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 560 transitions, 8617 flow [2024-06-27 19:29:42,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 560 transitions, 8336 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:29:42,503 INFO L231 Difference]: Finished difference. Result has 415 places, 541 transitions, 7313 flow [2024-06-27 19:29:42,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7120, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7313, PETRI_PLACES=415, PETRI_TRANSITIONS=541} [2024-06-27 19:29:42,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-27 19:29:42,503 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 541 transitions, 7313 flow [2024-06-27 19:29:42,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:42,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:42,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:42,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:29:42,504 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:42,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1016248343, now seen corresponding path program 10 times [2024-06-27 19:29:42,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:42,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552562070] [2024-06-27 19:29:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:42,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:42,578 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 19:29:42,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552562070] [2024-06-27 19:29:42,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552562070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:42,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:42,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:42,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143741740] [2024-06-27 19:29:42,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:42,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:42,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:42,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:42,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:42,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:42,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 541 transitions, 7313 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:42,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:42,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:42,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:43,917 INFO L124 PetriNetUnfolderBase]: 3752/6392 cut-off events. [2024-06-27 19:29:43,917 INFO L125 PetriNetUnfolderBase]: For 837119/837119 co-relation queries the response was YES. [2024-06-27 19:29:43,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51250 conditions, 6392 events. 3752/6392 cut-off events. For 837119/837119 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44803 event pairs, 608 based on Foata normal form. 2/6389 useless extension candidates. Maximal degree in co-relation 51069. Up to 3948 conditions per place. [2024-06-27 19:29:44,007 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 157 changer transitions 0/578 dead transitions. [2024-06-27 19:29:44,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 578 transitions, 9050 flow [2024-06-27 19:29:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:29:44,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:29:44,008 INFO L175 Difference]: Start difference. First operand has 415 places, 541 transitions, 7313 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:29:44,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 578 transitions, 9050 flow [2024-06-27 19:29:47,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 578 transitions, 8908 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:29:47,726 INFO L231 Difference]: Finished difference. Result has 418 places, 543 transitions, 7549 flow [2024-06-27 19:29:47,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7171, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7549, PETRI_PLACES=418, PETRI_TRANSITIONS=543} [2024-06-27 19:29:47,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-27 19:29:47,726 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 543 transitions, 7549 flow [2024-06-27 19:29:47,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:47,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:47,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:47,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:29:47,727 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:47,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:47,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1015890293, now seen corresponding path program 11 times [2024-06-27 19:29:47,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:47,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441591483] [2024-06-27 19:29:47,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:47,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:47,795 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 19:29:47,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:47,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441591483] [2024-06-27 19:29:47,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441591483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:47,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:47,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:47,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204402448] [2024-06-27 19:29:47,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:47,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:47,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:47,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:47,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:47,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 543 transitions, 7549 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:47,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:47,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:47,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:49,050 INFO L124 PetriNetUnfolderBase]: 3727/6340 cut-off events. [2024-06-27 19:29:49,050 INFO L125 PetriNetUnfolderBase]: For 847749/847749 co-relation queries the response was YES. [2024-06-27 19:29:49,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51126 conditions, 6340 events. 3727/6340 cut-off events. For 847749/847749 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44283 event pairs, 671 based on Foata normal form. 8/6343 useless extension candidates. Maximal degree in co-relation 50944. Up to 3934 conditions per place. [2024-06-27 19:29:49,145 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 423 selfloop transitions, 144 changer transitions 0/575 dead transitions. [2024-06-27 19:29:49,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 575 transitions, 9011 flow [2024-06-27 19:29:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:29:49,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:29:49,146 INFO L175 Difference]: Start difference. First operand has 418 places, 543 transitions, 7549 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:29:49,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 575 transitions, 9011 flow [2024-06-27 19:29:53,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 575 transitions, 8558 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-27 19:29:53,126 INFO L231 Difference]: Finished difference. Result has 418 places, 543 transitions, 7390 flow [2024-06-27 19:29:53,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7096, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7390, PETRI_PLACES=418, PETRI_TRANSITIONS=543} [2024-06-27 19:29:53,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-27 19:29:53,131 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 543 transitions, 7390 flow [2024-06-27 19:29:53,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:53,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:53,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:53,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:29:53,131 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:53,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:53,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1741670377, now seen corresponding path program 12 times [2024-06-27 19:29:53,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:53,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169506509] [2024-06-27 19:29:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:53,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:53,210 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 19:29:53,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:53,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169506509] [2024-06-27 19:29:53,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169506509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:53,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:53,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:53,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978429001] [2024-06-27 19:29:53,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:53,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:53,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:53,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 543 transitions, 7390 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:53,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:53,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:53,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:54,416 INFO L124 PetriNetUnfolderBase]: 3704/6306 cut-off events. [2024-06-27 19:29:54,416 INFO L125 PetriNetUnfolderBase]: For 813340/813340 co-relation queries the response was YES. [2024-06-27 19:29:54,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49156 conditions, 6306 events. 3704/6306 cut-off events. For 813340/813340 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44217 event pairs, 742 based on Foata normal form. 10/6311 useless extension candidates. Maximal degree in co-relation 48976. Up to 5182 conditions per place. [2024-06-27 19:29:54,511 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 445 selfloop transitions, 117 changer transitions 0/570 dead transitions. [2024-06-27 19:29:54,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 570 transitions, 8834 flow [2024-06-27 19:29:54,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:54,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:29:54,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:29:54,512 INFO L175 Difference]: Start difference. First operand has 418 places, 543 transitions, 7390 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:29:54,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 570 transitions, 8834 flow [2024-06-27 19:29:58,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 570 transitions, 8521 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:29:58,459 INFO L231 Difference]: Finished difference. Result has 419 places, 543 transitions, 7318 flow [2024-06-27 19:29:58,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7077, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7318, PETRI_PLACES=419, PETRI_TRANSITIONS=543} [2024-06-27 19:29:58,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-27 19:29:58,459 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 543 transitions, 7318 flow [2024-06-27 19:29:58,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:58,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:58,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:58,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:29:58,460 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:58,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:58,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1318787573, now seen corresponding path program 13 times [2024-06-27 19:29:58,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:58,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858377360] [2024-06-27 19:29:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:58,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:58,537 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 19:29:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858377360] [2024-06-27 19:29:58,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858377360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:58,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:58,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:58,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179755820] [2024-06-27 19:29:58,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:58,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:58,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:58,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:58,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:58,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:58,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 543 transitions, 7318 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:29:58,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:58,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:58,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:59,751 INFO L124 PetriNetUnfolderBase]: 3674/6260 cut-off events. [2024-06-27 19:29:59,751 INFO L125 PetriNetUnfolderBase]: For 771295/771295 co-relation queries the response was YES. [2024-06-27 19:29:59,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47454 conditions, 6260 events. 3674/6260 cut-off events. For 771295/771295 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 43967 event pairs, 748 based on Foata normal form. 10/6265 useless extension candidates. Maximal degree in co-relation 47273. Up to 5382 conditions per place. [2024-06-27 19:29:59,842 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 446 selfloop transitions, 111 changer transitions 0/565 dead transitions. [2024-06-27 19:29:59,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 565 transitions, 8510 flow [2024-06-27 19:29:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:59,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:29:59,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:29:59,843 INFO L175 Difference]: Start difference. First operand has 419 places, 543 transitions, 7318 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:29:59,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 565 transitions, 8510 flow [2024-06-27 19:30:04,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 565 transitions, 8249 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:30:04,123 INFO L231 Difference]: Finished difference. Result has 422 places, 543 transitions, 7285 flow [2024-06-27 19:30:04,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7057, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7285, PETRI_PLACES=422, PETRI_TRANSITIONS=543} [2024-06-27 19:30:04,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-27 19:30:04,124 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 543 transitions, 7285 flow [2024-06-27 19:30:04,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:04,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:04,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:04,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:30:04,124 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:04,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:04,125 INFO L85 PathProgramCache]: Analyzing trace with hash 857811851, now seen corresponding path program 14 times [2024-06-27 19:30:04,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:04,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138418497] [2024-06-27 19:30:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:04,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:04,222 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 19:30:04,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:04,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138418497] [2024-06-27 19:30:04,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138418497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:04,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:04,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:30:04,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872811325] [2024-06-27 19:30:04,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:04,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:30:04,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:04,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:30:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:30:04,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:04,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 543 transitions, 7285 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:04,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:04,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:04,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:05,537 INFO L124 PetriNetUnfolderBase]: 3651/6227 cut-off events. [2024-06-27 19:30:05,537 INFO L125 PetriNetUnfolderBase]: For 726911/726911 co-relation queries the response was YES. [2024-06-27 19:30:05,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45936 conditions, 6227 events. 3651/6227 cut-off events. For 726911/726911 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 43725 event pairs, 739 based on Foata normal form. 10/6232 useless extension candidates. Maximal degree in co-relation 45754. Up to 5467 conditions per place. [2024-06-27 19:30:05,620 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 484 selfloop transitions, 70 changer transitions 0/562 dead transitions. [2024-06-27 19:30:05,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 562 transitions, 8463 flow [2024-06-27 19:30:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:30:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:30:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:30:05,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-27 19:30:05,622 INFO L175 Difference]: Start difference. First operand has 422 places, 543 transitions, 7285 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:30:05,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 562 transitions, 8463 flow [2024-06-27 19:30:09,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 562 transitions, 8200 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:30:09,622 INFO L231 Difference]: Finished difference. Result has 422 places, 543 transitions, 7168 flow [2024-06-27 19:30:09,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7022, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7168, PETRI_PLACES=422, PETRI_TRANSITIONS=543} [2024-06-27 19:30:09,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-27 19:30:09,623 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 543 transitions, 7168 flow [2024-06-27 19:30:09,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:09,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:09,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:09,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:30:09,623 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:09,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash 867335051, now seen corresponding path program 15 times [2024-06-27 19:30:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:09,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108296693] [2024-06-27 19:30:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:09,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:09,703 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 19:30:09,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:09,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108296693] [2024-06-27 19:30:09,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108296693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:09,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:09,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:30:09,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152063895] [2024-06-27 19:30:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:09,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:30:09,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:09,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:30:09,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:30:09,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:09,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 543 transitions, 7168 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:09,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:09,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:09,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:10,896 INFO L124 PetriNetUnfolderBase]: 3628/6192 cut-off events. [2024-06-27 19:30:10,897 INFO L125 PetriNetUnfolderBase]: For 682287/682287 co-relation queries the response was YES. [2024-06-27 19:30:10,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44499 conditions, 6192 events. 3628/6192 cut-off events. For 682287/682287 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 43471 event pairs, 712 based on Foata normal form. 10/6197 useless extension candidates. Maximal degree in co-relation 44316. Up to 5076 conditions per place. [2024-06-27 19:30:10,999 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 482 selfloop transitions, 77 changer transitions 0/567 dead transitions. [2024-06-27 19:30:10,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 567 transitions, 8604 flow [2024-06-27 19:30:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:30:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:30:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:30:11,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:30:11,000 INFO L175 Difference]: Start difference. First operand has 422 places, 543 transitions, 7168 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:30:11,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 567 transitions, 8604 flow [2024-06-27 19:30:15,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 567 transitions, 8438 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:30:15,239 INFO L231 Difference]: Finished difference. Result has 424 places, 543 transitions, 7164 flow [2024-06-27 19:30:15,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7002, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7164, PETRI_PLACES=424, PETRI_TRANSITIONS=543} [2024-06-27 19:30:15,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-27 19:30:15,240 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 543 transitions, 7164 flow [2024-06-27 19:30:15,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:15,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:15,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:15,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:30:15,240 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:15,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1067082101, now seen corresponding path program 16 times [2024-06-27 19:30:15,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:15,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071069150] [2024-06-27 19:30:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:15,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:15,324 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 19:30:15,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:15,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071069150] [2024-06-27 19:30:15,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071069150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:15,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:15,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:30:15,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782531115] [2024-06-27 19:30:15,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:15,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:30:15,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:15,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:30:15,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:30:15,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:15,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 543 transitions, 7164 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:15,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:15,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:15,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:16,494 INFO L124 PetriNetUnfolderBase]: 3598/6146 cut-off events. [2024-06-27 19:30:16,494 INFO L125 PetriNetUnfolderBase]: For 637922/637922 co-relation queries the response was YES. [2024-06-27 19:30:16,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43125 conditions, 6146 events. 3598/6146 cut-off events. For 637922/637922 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 43193 event pairs, 718 based on Foata normal form. 10/6151 useless extension candidates. Maximal degree in co-relation 42941. Up to 5388 conditions per place. [2024-06-27 19:30:16,585 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 482 selfloop transitions, 74 changer transitions 0/564 dead transitions. [2024-06-27 19:30:16,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 564 transitions, 8350 flow [2024-06-27 19:30:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:30:16,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:30:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-27 19:30:16,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-27 19:30:16,586 INFO L175 Difference]: Start difference. First operand has 424 places, 543 transitions, 7164 flow. Second operand 10 states and 230 transitions. [2024-06-27 19:30:16,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 564 transitions, 8350 flow [2024-06-27 19:30:20,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 564 transitions, 8169 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:30:20,350 INFO L231 Difference]: Finished difference. Result has 429 places, 543 transitions, 7137 flow [2024-06-27 19:30:20,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6983, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7137, PETRI_PLACES=429, PETRI_TRANSITIONS=543} [2024-06-27 19:30:20,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-27 19:30:20,351 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 543 transitions, 7137 flow [2024-06-27 19:30:20,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:20,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:20,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:20,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:30:20,352 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:20,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1029592709, now seen corresponding path program 1 times [2024-06-27 19:30:20,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:20,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872831385] [2024-06-27 19:30:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:20,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:20,424 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 19:30:20,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:20,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872831385] [2024-06-27 19:30:20,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872831385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:20,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:20,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:20,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449777436] [2024-06-27 19:30:20,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:20,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:20,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:20,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:20,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:20,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:20,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 543 transitions, 7137 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:30:20,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:20,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:20,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:21,627 INFO L124 PetriNetUnfolderBase]: 3606/6160 cut-off events. [2024-06-27 19:30:21,627 INFO L125 PetriNetUnfolderBase]: For 598664/598664 co-relation queries the response was YES. [2024-06-27 19:30:21,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42955 conditions, 6160 events. 3606/6160 cut-off events. For 598664/598664 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43284 event pairs, 716 based on Foata normal form. 2/6157 useless extension candidates. Maximal degree in co-relation 42770. Up to 5473 conditions per place. [2024-06-27 19:30:21,715 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 500 selfloop transitions, 52 changer transitions 0/560 dead transitions. [2024-06-27 19:30:21,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 560 transitions, 8327 flow [2024-06-27 19:30:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:30:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:30:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:30:21,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-27 19:30:21,716 INFO L175 Difference]: Start difference. First operand has 429 places, 543 transitions, 7137 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:30:21,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 560 transitions, 8327 flow [2024-06-27 19:30:25,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 560 transitions, 8127 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 19:30:25,384 INFO L231 Difference]: Finished difference. Result has 426 places, 545 transitions, 7100 flow [2024-06-27 19:30:25,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6937, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7100, PETRI_PLACES=426, PETRI_TRANSITIONS=545} [2024-06-27 19:30:25,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-27 19:30:25,385 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 545 transitions, 7100 flow [2024-06-27 19:30:25,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:30:25,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:25,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:25,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:30:25,385 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:25,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:25,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1044829829, now seen corresponding path program 2 times [2024-06-27 19:30:25,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:25,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171757856] [2024-06-27 19:30:25,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:25,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:25,458 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 19:30:25,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:25,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171757856] [2024-06-27 19:30:25,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171757856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:25,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:25,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:25,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870019962] [2024-06-27 19:30:25,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:25,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:25,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:25,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:25,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:25,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:25,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 545 transitions, 7100 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:30:25,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:25,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:25,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:26,653 INFO L124 PetriNetUnfolderBase]: 3614/6168 cut-off events. [2024-06-27 19:30:26,654 INFO L125 PetriNetUnfolderBase]: For 607911/607911 co-relation queries the response was YES. [2024-06-27 19:30:26,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43021 conditions, 6168 events. 3614/6168 cut-off events. For 607911/607911 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 43356 event pairs, 710 based on Foata normal form. 2/6165 useless extension candidates. Maximal degree in co-relation 42835. Up to 5465 conditions per place. [2024-06-27 19:30:26,746 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 501 selfloop transitions, 54 changer transitions 0/563 dead transitions. [2024-06-27 19:30:26,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 563 transitions, 8302 flow [2024-06-27 19:30:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:30:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:30:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:30:26,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-27 19:30:26,747 INFO L175 Difference]: Start difference. First operand has 426 places, 545 transitions, 7100 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:30:26,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 563 transitions, 8302 flow [2024-06-27 19:30:30,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 563 transitions, 8143 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:30:30,639 INFO L231 Difference]: Finished difference. Result has 428 places, 547 transitions, 7112 flow [2024-06-27 19:30:30,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6941, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7112, PETRI_PLACES=428, PETRI_TRANSITIONS=547} [2024-06-27 19:30:30,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-27 19:30:30,639 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 547 transitions, 7112 flow [2024-06-27 19:30:30,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:30:30,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:30,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:30,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:30:30,640 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:30,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:30,640 INFO L85 PathProgramCache]: Analyzing trace with hash 657853893, now seen corresponding path program 17 times [2024-06-27 19:30:30,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:30,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836827954] [2024-06-27 19:30:30,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:30,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:30,723 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 19:30:30,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:30,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836827954] [2024-06-27 19:30:30,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836827954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:30,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:30,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:30:30,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131987702] [2024-06-27 19:30:30,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:30,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:30:30,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:30:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:30:30,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:30,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 547 transitions, 7112 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:30,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:30,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:30,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:31,924 INFO L124 PetriNetUnfolderBase]: 3591/6136 cut-off events. [2024-06-27 19:30:31,924 INFO L125 PetriNetUnfolderBase]: For 586130/586130 co-relation queries the response was YES. [2024-06-27 19:30:31,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41450 conditions, 6136 events. 3591/6136 cut-off events. For 586130/586130 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 43106 event pairs, 702 based on Foata normal form. 10/6141 useless extension candidates. Maximal degree in co-relation 41263. Up to 5235 conditions per place. [2024-06-27 19:30:32,015 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 457 selfloop transitions, 109 changer transitions 0/574 dead transitions. [2024-06-27 19:30:32,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 574 transitions, 8336 flow [2024-06-27 19:30:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:30:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:30:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:30:32,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:30:32,016 INFO L175 Difference]: Start difference. First operand has 428 places, 547 transitions, 7112 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:30:32,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 574 transitions, 8336 flow [2024-06-27 19:30:35,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 574 transitions, 8151 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 19:30:35,583 INFO L231 Difference]: Finished difference. Result has 430 places, 547 transitions, 7158 flow [2024-06-27 19:30:35,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6927, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7158, PETRI_PLACES=430, PETRI_TRANSITIONS=547} [2024-06-27 19:30:35,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-27 19:30:35,583 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 547 transitions, 7158 flow [2024-06-27 19:30:35,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:35,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:35,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:35,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:30:35,584 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:35,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash -624106841, now seen corresponding path program 18 times [2024-06-27 19:30:35,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:35,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070359058] [2024-06-27 19:30:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:35,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:35,667 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 19:30:35,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:35,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070359058] [2024-06-27 19:30:35,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070359058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:35,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:35,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:30:35,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400954697] [2024-06-27 19:30:35,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:35,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:30:35,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:35,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:30:35,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:30:35,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:35,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 547 transitions, 7158 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:35,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:35,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:35,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:36,884 INFO L124 PetriNetUnfolderBase]: 3568/6102 cut-off events. [2024-06-27 19:30:36,884 INFO L125 PetriNetUnfolderBase]: For 535177/535180 co-relation queries the response was YES. [2024-06-27 19:30:36,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40121 conditions, 6102 events. 3568/6102 cut-off events. For 535177/535180 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 42924 event pairs, 691 based on Foata normal form. 12/6104 useless extension candidates. Maximal degree in co-relation 39933. Up to 5228 conditions per place. [2024-06-27 19:30:36,975 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 446 selfloop transitions, 131 changer transitions 0/585 dead transitions. [2024-06-27 19:30:36,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 585 transitions, 8432 flow [2024-06-27 19:30:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:30:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:30:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 19:30:36,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314363143631436 [2024-06-27 19:30:36,975 INFO L175 Difference]: Start difference. First operand has 430 places, 547 transitions, 7158 flow. Second operand 9 states and 233 transitions. [2024-06-27 19:30:36,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 585 transitions, 8432 flow [2024-06-27 19:30:39,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 585 transitions, 8171 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:30:39,867 INFO L231 Difference]: Finished difference. Result has 432 places, 547 transitions, 7174 flow [2024-06-27 19:30:39,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6897, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7174, PETRI_PLACES=432, PETRI_TRANSITIONS=547} [2024-06-27 19:30:39,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-27 19:30:39,867 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 547 transitions, 7174 flow [2024-06-27 19:30:39,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:39,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:39,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:39,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 19:30:39,868 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:39,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:39,868 INFO L85 PathProgramCache]: Analyzing trace with hash 401353383, now seen corresponding path program 19 times [2024-06-27 19:30:39,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:39,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041150666] [2024-06-27 19:30:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:39,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:39,953 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 19:30:39,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:39,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041150666] [2024-06-27 19:30:39,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041150666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:39,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:39,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:30:39,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047064163] [2024-06-27 19:30:39,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:39,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:30:39,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:39,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:30:39,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:30:39,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:39,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 547 transitions, 7174 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:39,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:39,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:39,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:41,175 INFO L124 PetriNetUnfolderBase]: 3545/6074 cut-off events. [2024-06-27 19:30:41,175 INFO L125 PetriNetUnfolderBase]: For 472844/472844 co-relation queries the response was YES. [2024-06-27 19:30:41,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38612 conditions, 6074 events. 3545/6074 cut-off events. For 472844/472844 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 42821 event pairs, 686 based on Foata normal form. 10/6079 useless extension candidates. Maximal degree in co-relation 38424. Up to 5163 conditions per place. [2024-06-27 19:30:41,264 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 451 selfloop transitions, 123 changer transitions 0/582 dead transitions. [2024-06-27 19:30:41,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 582 transitions, 8434 flow [2024-06-27 19:30:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:30:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:30:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 19:30:41,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205962059620597 [2024-06-27 19:30:41,265 INFO L175 Difference]: Start difference. First operand has 432 places, 547 transitions, 7174 flow. Second operand 9 states and 229 transitions. [2024-06-27 19:30:41,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 582 transitions, 8434 flow [2024-06-27 19:30:43,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 582 transitions, 8132 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 19:30:44,002 INFO L231 Difference]: Finished difference. Result has 432 places, 547 transitions, 7134 flow [2024-06-27 19:30:44,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6872, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7134, PETRI_PLACES=432, PETRI_TRANSITIONS=547} [2024-06-27 19:30:44,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-27 19:30:44,002 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 547 transitions, 7134 flow [2024-06-27 19:30:44,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:44,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:44,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:44,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 19:30:44,002 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:44,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash 667377093, now seen corresponding path program 20 times [2024-06-27 19:30:44,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:44,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624457607] [2024-06-27 19:30:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:44,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:44,082 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 19:30:44,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:44,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624457607] [2024-06-27 19:30:44,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624457607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:44,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:44,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:30:44,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903483978] [2024-06-27 19:30:44,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:44,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:30:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:44,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:30:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:30:44,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:44,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 547 transitions, 7134 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:44,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:44,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:44,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:45,247 INFO L124 PetriNetUnfolderBase]: 3515/6041 cut-off events. [2024-06-27 19:30:45,247 INFO L125 PetriNetUnfolderBase]: For 404356/404356 co-relation queries the response was YES. [2024-06-27 19:30:45,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36991 conditions, 6041 events. 3515/6041 cut-off events. For 404356/404356 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 42550 event pairs, 550 based on Foata normal form. 10/6046 useless extension candidates. Maximal degree in co-relation 36803. Up to 4278 conditions per place. [2024-06-27 19:30:45,335 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 131 changer transitions 0/578 dead transitions. [2024-06-27 19:30:45,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 578 transitions, 8400 flow [2024-06-27 19:30:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:30:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:30:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:30:45,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-27 19:30:45,336 INFO L175 Difference]: Start difference. First operand has 432 places, 547 transitions, 7134 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:30:45,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 578 transitions, 8400 flow [2024-06-27 19:30:48,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 578 transitions, 8110 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-27 19:30:48,092 INFO L231 Difference]: Finished difference. Result has 429 places, 547 transitions, 7124 flow [2024-06-27 19:30:48,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6844, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7124, PETRI_PLACES=429, PETRI_TRANSITIONS=547} [2024-06-27 19:30:48,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-27 19:30:48,092 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 547 transitions, 7124 flow [2024-06-27 19:30:48,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:30:48,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:48,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:48,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 19:30:48,093 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:48,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:48,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1732941011, now seen corresponding path program 3 times [2024-06-27 19:30:48,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:48,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546142681] [2024-06-27 19:30:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:48,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:48,167 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 19:30:48,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:48,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546142681] [2024-06-27 19:30:48,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546142681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:48,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:48,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:48,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989346089] [2024-06-27 19:30:48,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:48,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:48,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:48,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:48,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:48,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 547 transitions, 7124 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:30:48,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:48,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:48,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:49,324 INFO L124 PetriNetUnfolderBase]: 3536/6048 cut-off events. [2024-06-27 19:30:49,328 INFO L125 PetriNetUnfolderBase]: For 366106/366106 co-relation queries the response was YES. [2024-06-27 19:30:49,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37609 conditions, 6048 events. 3536/6048 cut-off events. For 366106/366106 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 42540 event pairs, 666 based on Foata normal form. 2/6045 useless extension candidates. Maximal degree in co-relation 37422. Up to 5304 conditions per place. [2024-06-27 19:30:49,417 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 498 selfloop transitions, 61 changer transitions 0/567 dead transitions. [2024-06-27 19:30:49,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 567 transitions, 8610 flow [2024-06-27 19:30:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:30:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:30:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:30:49,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-27 19:30:49,418 INFO L175 Difference]: Start difference. First operand has 429 places, 547 transitions, 7124 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:30:49,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 567 transitions, 8610 flow [2024-06-27 19:30:51,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 567 transitions, 8262 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:30:51,926 INFO L231 Difference]: Finished difference. Result has 427 places, 551 transitions, 7029 flow [2024-06-27 19:30:51,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6778, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7029, PETRI_PLACES=427, PETRI_TRANSITIONS=551} [2024-06-27 19:30:51,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-27 19:30:51,926 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 551 transitions, 7029 flow [2024-06-27 19:30:51,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:30:51,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:51,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:51,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 19:30:51,927 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:51,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:51,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1311981539, now seen corresponding path program 4 times [2024-06-27 19:30:51,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:51,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512170358] [2024-06-27 19:30:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:51,996 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 19:30:51,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:51,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512170358] [2024-06-27 19:30:51,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512170358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:51,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:51,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:51,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622188793] [2024-06-27 19:30:51,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:51,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:51,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:52,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:52,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 551 transitions, 7029 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:30:52,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:52,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:52,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:53,122 INFO L124 PetriNetUnfolderBase]: 3544/6077 cut-off events. [2024-06-27 19:30:53,122 INFO L125 PetriNetUnfolderBase]: For 363116/363119 co-relation queries the response was YES. [2024-06-27 19:30:53,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37127 conditions, 6077 events. 3544/6077 cut-off events. For 363116/363119 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 42826 event pairs, 686 based on Foata normal form. 4/6075 useless extension candidates. Maximal degree in co-relation 36940. Up to 5383 conditions per place. [2024-06-27 19:30:53,212 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 505 selfloop transitions, 60 changer transitions 0/573 dead transitions. [2024-06-27 19:30:53,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 573 transitions, 8271 flow [2024-06-27 19:30:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:30:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:30:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:30:53,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:30:53,213 INFO L175 Difference]: Start difference. First operand has 427 places, 551 transitions, 7029 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:30:53,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 573 transitions, 8271 flow [2024-06-27 19:30:56,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 573 transitions, 8143 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-27 19:30:56,177 INFO L231 Difference]: Finished difference. Result has 431 places, 553 transitions, 7092 flow [2024-06-27 19:30:56,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6915, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7092, PETRI_PLACES=431, PETRI_TRANSITIONS=553} [2024-06-27 19:30:56,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-27 19:30:56,179 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 553 transitions, 7092 flow [2024-06-27 19:30:56,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:30:56,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:56,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:56,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 19:30:56,179 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:56,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:56,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1303410659, now seen corresponding path program 5 times [2024-06-27 19:30:56,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:56,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847417205] [2024-06-27 19:30:56,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:56,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:56,256 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 19:30:56,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:56,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847417205] [2024-06-27 19:30:56,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847417205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:56,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:56,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:56,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106028140] [2024-06-27 19:30:56,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:56,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:56,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:56,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:56,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:56,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:56,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 553 transitions, 7092 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:30:56,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:56,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:56,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:57,368 INFO L124 PetriNetUnfolderBase]: 3552/6085 cut-off events. [2024-06-27 19:30:57,368 INFO L125 PetriNetUnfolderBase]: For 369200/369203 co-relation queries the response was YES. [2024-06-27 19:30:57,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37333 conditions, 6085 events. 3552/6085 cut-off events. For 369200/369203 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 42867 event pairs, 682 based on Foata normal form. 4/6083 useless extension candidates. Maximal degree in co-relation 37144. Up to 5366 conditions per place. [2024-06-27 19:30:57,456 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 503 selfloop transitions, 65 changer transitions 0/576 dead transitions. [2024-06-27 19:30:57,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 576 transitions, 8595 flow [2024-06-27 19:30:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:30:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:30:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:30:57,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:30:57,457 INFO L175 Difference]: Start difference. First operand has 431 places, 553 transitions, 7092 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:30:57,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 576 transitions, 8595 flow [2024-06-27 19:31:00,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 576 transitions, 8438 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:00,318 INFO L231 Difference]: Finished difference. Result has 434 places, 557 transitions, 7193 flow [2024-06-27 19:31:00,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6935, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7193, PETRI_PLACES=434, PETRI_TRANSITIONS=557} [2024-06-27 19:31:00,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-27 19:31:00,318 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 557 transitions, 7193 flow [2024-06-27 19:31:00,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:31:00,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:00,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:00,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 19:31:00,319 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:00,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:00,319 INFO L85 PathProgramCache]: Analyzing trace with hash 175621153, now seen corresponding path program 6 times [2024-06-27 19:31:00,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:00,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099517518] [2024-06-27 19:31:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:00,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:00,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:00,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099517518] [2024-06-27 19:31:00,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099517518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:00,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:00,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:00,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158207055] [2024-06-27 19:31:00,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:00,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:00,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:00,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:00,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 557 transitions, 7193 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:31:00,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:00,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:00,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:01,592 INFO L124 PetriNetUnfolderBase]: 3547/6077 cut-off events. [2024-06-27 19:31:01,592 INFO L125 PetriNetUnfolderBase]: For 363757/363757 co-relation queries the response was YES. [2024-06-27 19:31:01,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37162 conditions, 6077 events. 3547/6077 cut-off events. For 363757/363757 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 42871 event pairs, 683 based on Foata normal form. 2/6074 useless extension candidates. Maximal degree in co-relation 36971. Up to 5382 conditions per place. [2024-06-27 19:31:01,678 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 509 selfloop transitions, 57 changer transitions 0/574 dead transitions. [2024-06-27 19:31:01,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 574 transitions, 8367 flow [2024-06-27 19:31:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:31:01,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 19:31:01,679 INFO L175 Difference]: Start difference. First operand has 434 places, 557 transitions, 7193 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:31:01,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 574 transitions, 8367 flow [2024-06-27 19:31:04,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 574 transitions, 8169 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-27 19:31:04,235 INFO L231 Difference]: Finished difference. Result has 438 places, 557 transitions, 7117 flow [2024-06-27 19:31:04,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7117, PETRI_PLACES=438, PETRI_TRANSITIONS=557} [2024-06-27 19:31:04,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-27 19:31:04,235 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 557 transitions, 7117 flow [2024-06-27 19:31:04,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:31:04,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:04,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:04,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 19:31:04,236 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:04,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash 454559773, now seen corresponding path program 7 times [2024-06-27 19:31:04,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:04,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831721655] [2024-06-27 19:31:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:04,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:04,303 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 19:31:04,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:04,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831721655] [2024-06-27 19:31:04,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831721655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:04,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:04,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4557188] [2024-06-27 19:31:04,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:04,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:04,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:04,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:04,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 557 transitions, 7117 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:31:04,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:04,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:04,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:05,451 INFO L124 PetriNetUnfolderBase]: 3555/6082 cut-off events. [2024-06-27 19:31:05,451 INFO L125 PetriNetUnfolderBase]: For 369623/369626 co-relation queries the response was YES. [2024-06-27 19:31:05,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37261 conditions, 6082 events. 3555/6082 cut-off events. For 369623/369626 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 42959 event pairs, 636 based on Foata normal form. 4/6079 useless extension candidates. Maximal degree in co-relation 37068. Up to 5263 conditions per place. [2024-06-27 19:31:05,545 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 498 selfloop transitions, 70 changer transitions 0/576 dead transitions. [2024-06-27 19:31:05,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 576 transitions, 8644 flow [2024-06-27 19:31:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:31:05,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-27 19:31:05,546 INFO L175 Difference]: Start difference. First operand has 438 places, 557 transitions, 7117 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:31:05,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 576 transitions, 8644 flow [2024-06-27 19:31:09,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 576 transitions, 8511 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:31:09,188 INFO L231 Difference]: Finished difference. Result has 440 places, 562 transitions, 7286 flow [2024-06-27 19:31:09,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6984, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7286, PETRI_PLACES=440, PETRI_TRANSITIONS=562} [2024-06-27 19:31:09,188 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-27 19:31:09,188 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 562 transitions, 7286 flow [2024-06-27 19:31:09,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:31:09,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:09,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:09,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 19:31:09,189 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:09,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:09,189 INFO L85 PathProgramCache]: Analyzing trace with hash 461226013, now seen corresponding path program 8 times [2024-06-27 19:31:09,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:09,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770194430] [2024-06-27 19:31:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:09,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:09,257 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 19:31:09,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:09,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770194430] [2024-06-27 19:31:09,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770194430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:09,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:09,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:09,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592967290] [2024-06-27 19:31:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:09,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:09,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:09,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:09,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:09,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:09,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 562 transitions, 7286 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:31:09,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:09,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:09,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:10,458 INFO L124 PetriNetUnfolderBase]: 3550/6075 cut-off events. [2024-06-27 19:31:10,458 INFO L125 PetriNetUnfolderBase]: For 364061/364064 co-relation queries the response was YES. [2024-06-27 19:31:10,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37179 conditions, 6075 events. 3550/6075 cut-off events. For 364061/364064 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 42868 event pairs, 636 based on Foata normal form. 4/6072 useless extension candidates. Maximal degree in co-relation 36984. Up to 5259 conditions per place. [2024-06-27 19:31:10,557 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 499 selfloop transitions, 69 changer transitions 0/576 dead transitions. [2024-06-27 19:31:10,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 576 transitions, 8491 flow [2024-06-27 19:31:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 19:31:10,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-27 19:31:10,558 INFO L175 Difference]: Start difference. First operand has 440 places, 562 transitions, 7286 flow. Second operand 6 states and 142 transitions. [2024-06-27 19:31:10,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 576 transitions, 8491 flow [2024-06-27 19:31:14,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 576 transitions, 8225 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:14,196 INFO L231 Difference]: Finished difference. Result has 443 places, 563 transitions, 7202 flow [2024-06-27 19:31:14,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7050, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7202, PETRI_PLACES=443, PETRI_TRANSITIONS=563} [2024-06-27 19:31:14,197 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-27 19:31:14,197 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 563 transitions, 7202 flow [2024-06-27 19:31:14,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 19:31:14,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:14,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:14,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 19:31:14,197 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:14,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:14,197 INFO L85 PathProgramCache]: Analyzing trace with hash 423617980, now seen corresponding path program 1 times [2024-06-27 19:31:14,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:14,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923507604] [2024-06-27 19:31:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:14,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:14,267 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 19:31:14,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:14,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923507604] [2024-06-27 19:31:14,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923507604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:14,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:14,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:14,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056071837] [2024-06-27 19:31:14,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:14,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:14,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:14,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:14,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:14,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:14,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 563 transitions, 7202 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:14,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:14,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:14,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:15,470 INFO L124 PetriNetUnfolderBase]: 3571/6114 cut-off events. [2024-06-27 19:31:15,471 INFO L125 PetriNetUnfolderBase]: For 372001/372001 co-relation queries the response was YES. [2024-06-27 19:31:15,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37386 conditions, 6114 events. 3571/6114 cut-off events. For 372001/372001 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 43228 event pairs, 697 based on Foata normal form. 1/6107 useless extension candidates. Maximal degree in co-relation 37190. Up to 5148 conditions per place. [2024-06-27 19:31:15,561 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 164 changer transitions 0/590 dead transitions. [2024-06-27 19:31:15,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 590 transitions, 8767 flow [2024-06-27 19:31:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:31:15,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:31:15,562 INFO L175 Difference]: Start difference. First operand has 443 places, 563 transitions, 7202 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:31:15,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 590 transitions, 8767 flow [2024-06-27 19:31:18,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 590 transitions, 8652 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:18,909 INFO L231 Difference]: Finished difference. Result has 448 places, 572 transitions, 7670 flow [2024-06-27 19:31:18,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7670, PETRI_PLACES=448, PETRI_TRANSITIONS=572} [2024-06-27 19:31:18,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-27 19:31:18,909 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 572 transitions, 7670 flow [2024-06-27 19:31:18,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:18,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:18,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:18,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 19:31:18,909 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:18,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:18,910 INFO L85 PathProgramCache]: Analyzing trace with hash 465573038, now seen corresponding path program 2 times [2024-06-27 19:31:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:18,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958381326] [2024-06-27 19:31:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:18,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:18,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:18,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958381326] [2024-06-27 19:31:18,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958381326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:18,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:18,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:18,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144666957] [2024-06-27 19:31:18,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:18,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:18,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:18,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:19,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:19,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 572 transitions, 7670 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:19,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:19,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:19,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:20,219 INFO L124 PetriNetUnfolderBase]: 3576/6123 cut-off events. [2024-06-27 19:31:20,220 INFO L125 PetriNetUnfolderBase]: For 379671/379671 co-relation queries the response was YES. [2024-06-27 19:31:20,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37979 conditions, 6123 events. 3576/6123 cut-off events. For 379671/379671 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 43258 event pairs, 697 based on Foata normal form. 1/6116 useless extension candidates. Maximal degree in co-relation 37781. Up to 5311 conditions per place. [2024-06-27 19:31:20,318 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 474 selfloop transitions, 108 changer transitions 0/590 dead transitions. [2024-06-27 19:31:20,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 590 transitions, 9148 flow [2024-06-27 19:31:20,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:31:20,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:31:20,319 INFO L175 Difference]: Start difference. First operand has 448 places, 572 transitions, 7670 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:31:20,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 590 transitions, 9148 flow [2024-06-27 19:31:24,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 590 transitions, 8890 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:31:24,350 INFO L231 Difference]: Finished difference. Result has 450 places, 575 transitions, 7697 flow [2024-06-27 19:31:24,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7697, PETRI_PLACES=450, PETRI_TRANSITIONS=575} [2024-06-27 19:31:24,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-27 19:31:24,350 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 575 transitions, 7697 flow [2024-06-27 19:31:24,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:24,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:24,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:24,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 19:31:24,351 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:24,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:24,351 INFO L85 PathProgramCache]: Analyzing trace with hash 38970334, now seen corresponding path program 3 times [2024-06-27 19:31:24,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:24,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836797876] [2024-06-27 19:31:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:24,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:24,428 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 19:31:24,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:24,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836797876] [2024-06-27 19:31:24,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836797876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:24,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:24,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:24,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067724761] [2024-06-27 19:31:24,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:24,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:24,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:24,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:24,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:24,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:24,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 575 transitions, 7697 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:24,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:24,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:24,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:25,665 INFO L124 PetriNetUnfolderBase]: 3573/6119 cut-off events. [2024-06-27 19:31:25,665 INFO L125 PetriNetUnfolderBase]: For 373552/373552 co-relation queries the response was YES. [2024-06-27 19:31:25,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37726 conditions, 6119 events. 3573/6119 cut-off events. For 373552/373552 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 43232 event pairs, 697 based on Foata normal form. 1/6112 useless extension candidates. Maximal degree in co-relation 37528. Up to 5308 conditions per place. [2024-06-27 19:31:25,757 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 468 selfloop transitions, 115 changer transitions 0/591 dead transitions. [2024-06-27 19:31:25,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 591 transitions, 8901 flow [2024-06-27 19:31:25,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:31:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:31:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:31:25,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-27 19:31:25,758 INFO L175 Difference]: Start difference. First operand has 450 places, 575 transitions, 7697 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:31:25,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 591 transitions, 8901 flow [2024-06-27 19:31:30,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 591 transitions, 8709 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:30,309 INFO L231 Difference]: Finished difference. Result has 455 places, 575 transitions, 7746 flow [2024-06-27 19:31:30,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7505, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7746, PETRI_PLACES=455, PETRI_TRANSITIONS=575} [2024-06-27 19:31:30,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-27 19:31:30,310 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 575 transitions, 7746 flow [2024-06-27 19:31:30,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:30,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:30,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:30,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 19:31:30,310 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:30,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:30,311 INFO L85 PathProgramCache]: Analyzing trace with hash 243349498, now seen corresponding path program 4 times [2024-06-27 19:31:30,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:30,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451677131] [2024-06-27 19:31:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:30,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:30,388 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 19:31:30,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:30,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451677131] [2024-06-27 19:31:30,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451677131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:30,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:30,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:30,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577820843] [2024-06-27 19:31:30,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:30,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:30,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:30,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:30,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:30,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:30,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 575 transitions, 7746 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:30,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:30,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:30,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:31,654 INFO L124 PetriNetUnfolderBase]: 3586/6141 cut-off events. [2024-06-27 19:31:31,654 INFO L125 PetriNetUnfolderBase]: For 386669/386669 co-relation queries the response was YES. [2024-06-27 19:31:31,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38075 conditions, 6141 events. 3586/6141 cut-off events. For 386669/386669 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 43477 event pairs, 697 based on Foata normal form. 1/6134 useless extension candidates. Maximal degree in co-relation 37876. Up to 5202 conditions per place. [2024-06-27 19:31:31,748 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 413 selfloop transitions, 180 changer transitions 0/601 dead transitions. [2024-06-27 19:31:31,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 601 transitions, 9546 flow [2024-06-27 19:31:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:31:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:31:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:31:31,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-27 19:31:31,749 INFO L175 Difference]: Start difference. First operand has 455 places, 575 transitions, 7746 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:31:31,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 601 transitions, 9546 flow [2024-06-27 19:31:35,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 601 transitions, 9290 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:31:35,903 INFO L231 Difference]: Finished difference. Result has 455 places, 581 transitions, 7980 flow [2024-06-27 19:31:35,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7490, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7980, PETRI_PLACES=455, PETRI_TRANSITIONS=581} [2024-06-27 19:31:35,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-27 19:31:35,903 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 581 transitions, 7980 flow [2024-06-27 19:31:35,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:35,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:35,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:35,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 19:31:35,904 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:35,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1517342750, now seen corresponding path program 5 times [2024-06-27 19:31:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:35,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579482101] [2024-06-27 19:31:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:35,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:35,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:35,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579482101] [2024-06-27 19:31:35,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579482101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:35,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:35,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657099432] [2024-06-27 19:31:35,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:35,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:35,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:35,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:36,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:36,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 581 transitions, 7980 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:36,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:36,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:36,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:37,380 INFO L124 PetriNetUnfolderBase]: 3583/6137 cut-off events. [2024-06-27 19:31:37,380 INFO L125 PetriNetUnfolderBase]: For 386736/386736 co-relation queries the response was YES. [2024-06-27 19:31:37,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38194 conditions, 6137 events. 3583/6137 cut-off events. For 386736/386736 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 43450 event pairs, 694 based on Foata normal form. 1/6130 useless extension candidates. Maximal degree in co-relation 37994. Up to 5199 conditions per place. [2024-06-27 19:31:37,468 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 189 changer transitions 0/602 dead transitions. [2024-06-27 19:31:37,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 602 transitions, 9448 flow [2024-06-27 19:31:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:31:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:31:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-27 19:31:37,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:31:37,469 INFO L175 Difference]: Start difference. First operand has 455 places, 581 transitions, 7980 flow. Second operand 10 states and 240 transitions. [2024-06-27 19:31:37,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 602 transitions, 9448 flow [2024-06-27 19:31:40,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 602 transitions, 9067 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 19:31:40,795 INFO L231 Difference]: Finished difference. Result has 458 places, 581 transitions, 7992 flow [2024-06-27 19:31:40,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7603, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7992, PETRI_PLACES=458, PETRI_TRANSITIONS=581} [2024-06-27 19:31:40,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-27 19:31:40,796 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 581 transitions, 7992 flow [2024-06-27 19:31:40,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:40,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:40,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:40,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 19:31:40,796 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:40,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1524699980, now seen corresponding path program 6 times [2024-06-27 19:31:40,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:40,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936132728] [2024-06-27 19:31:40,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:40,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:40,872 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 19:31:40,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:40,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936132728] [2024-06-27 19:31:40,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936132728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:40,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:40,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:40,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496838749] [2024-06-27 19:31:40,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:40,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:40,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:40,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:40,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:40,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:40,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 581 transitions, 7992 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:40,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:40,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:40,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:42,140 INFO L124 PetriNetUnfolderBase]: 3580/6133 cut-off events. [2024-06-27 19:31:42,140 INFO L125 PetriNetUnfolderBase]: For 373543/373543 co-relation queries the response was YES. [2024-06-27 19:31:42,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37996 conditions, 6133 events. 3580/6133 cut-off events. For 373543/373543 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 43441 event pairs, 697 based on Foata normal form. 1/6126 useless extension candidates. Maximal degree in co-relation 37797. Up to 5196 conditions per place. [2024-06-27 19:31:42,235 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 425 selfloop transitions, 164 changer transitions 0/597 dead transitions. [2024-06-27 19:31:42,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 597 transitions, 9210 flow [2024-06-27 19:31:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:31:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:31:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:31:42,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-27 19:31:42,236 INFO L175 Difference]: Start difference. First operand has 458 places, 581 transitions, 7992 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:31:42,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 597 transitions, 9210 flow [2024-06-27 19:31:46,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 597 transitions, 8716 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 19:31:46,153 INFO L231 Difference]: Finished difference. Result has 454 places, 581 transitions, 7856 flow [2024-06-27 19:31:46,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7498, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7856, PETRI_PLACES=454, PETRI_TRANSITIONS=581} [2024-06-27 19:31:46,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-27 19:31:46,153 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 581 transitions, 7856 flow [2024-06-27 19:31:46,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:46,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:46,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:46,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 19:31:46,153 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:46,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash 266260050, now seen corresponding path program 7 times [2024-06-27 19:31:46,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:46,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954912215] [2024-06-27 19:31:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:46,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:46,221 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 19:31:46,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:46,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954912215] [2024-06-27 19:31:46,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954912215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:46,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:46,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:46,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065401488] [2024-06-27 19:31:46,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:46,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:46,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:46,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:46,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:46,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:46,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 581 transitions, 7856 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:46,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:46,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:46,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:47,464 INFO L124 PetriNetUnfolderBase]: 3601/6168 cut-off events. [2024-06-27 19:31:47,464 INFO L125 PetriNetUnfolderBase]: For 386727/386727 co-relation queries the response was YES. [2024-06-27 19:31:47,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38315 conditions, 6168 events. 3601/6168 cut-off events. For 386727/386727 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 43699 event pairs, 697 based on Foata normal form. 1/6161 useless extension candidates. Maximal degree in co-relation 38116. Up to 4878 conditions per place. [2024-06-27 19:31:47,561 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 334 selfloop transitions, 271 changer transitions 0/613 dead transitions. [2024-06-27 19:31:47,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 613 transitions, 9729 flow [2024-06-27 19:31:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:31:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:31:47,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:31:47,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:31:47,562 INFO L175 Difference]: Start difference. First operand has 454 places, 581 transitions, 7856 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:31:47,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 613 transitions, 9729 flow [2024-06-27 19:31:51,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 613 transitions, 9358 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:31:51,121 INFO L231 Difference]: Finished difference. Result has 455 places, 590 transitions, 8193 flow [2024-06-27 19:31:51,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7493, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8193, PETRI_PLACES=455, PETRI_TRANSITIONS=590} [2024-06-27 19:31:51,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-27 19:31:51,122 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 590 transitions, 8193 flow [2024-06-27 19:31:51,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:51,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:51,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:51,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 19:31:51,122 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:51,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash 269984700, now seen corresponding path program 8 times [2024-06-27 19:31:51,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:51,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144542500] [2024-06-27 19:31:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:51,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:51,196 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 19:31:51,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:51,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144542500] [2024-06-27 19:31:51,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144542500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:51,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:51,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:51,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946603505] [2024-06-27 19:31:51,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:51,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:51,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:51,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:51,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:51,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 590 transitions, 8193 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:51,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:51,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:51,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:52,462 INFO L124 PetriNetUnfolderBase]: 3614/6190 cut-off events. [2024-06-27 19:31:52,462 INFO L125 PetriNetUnfolderBase]: For 388949/388949 co-relation queries the response was YES. [2024-06-27 19:31:52,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38779 conditions, 6190 events. 3614/6190 cut-off events. For 388949/388949 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 43866 event pairs, 697 based on Foata normal form. 1/6183 useless extension candidates. Maximal degree in co-relation 38581. Up to 5321 conditions per place. [2024-06-27 19:31:52,559 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 480 selfloop transitions, 129 changer transitions 0/617 dead transitions. [2024-06-27 19:31:52,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 617 transitions, 9797 flow [2024-06-27 19:31:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:31:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:31:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-27 19:31:52,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-27 19:31:52,560 INFO L175 Difference]: Start difference. First operand has 455 places, 590 transitions, 8193 flow. Second operand 10 states and 228 transitions. [2024-06-27 19:31:52,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 617 transitions, 9797 flow [2024-06-27 19:31:55,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 617 transitions, 9170 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 19:31:55,804 INFO L231 Difference]: Finished difference. Result has 459 places, 596 transitions, 7946 flow [2024-06-27 19:31:55,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7596, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7946, PETRI_PLACES=459, PETRI_TRANSITIONS=596} [2024-06-27 19:31:55,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-27 19:31:55,805 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 596 transitions, 7946 flow [2024-06-27 19:31:55,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:55,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:55,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:55,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 19:31:55,805 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:55,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:55,805 INFO L85 PathProgramCache]: Analyzing trace with hash 269979120, now seen corresponding path program 9 times [2024-06-27 19:31:55,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:55,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32820344] [2024-06-27 19:31:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:55,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:55,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:55,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32820344] [2024-06-27 19:31:55,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32820344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:55,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:55,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:55,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754667626] [2024-06-27 19:31:55,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:55,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:55,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:55,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:55,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 596 transitions, 7946 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:31:55,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:55,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:55,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:57,289 INFO L124 PetriNetUnfolderBase]: 3611/6186 cut-off events. [2024-06-27 19:31:57,289 INFO L125 PetriNetUnfolderBase]: For 386534/386534 co-relation queries the response was YES. [2024-06-27 19:31:57,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37931 conditions, 6186 events. 3611/6186 cut-off events. For 386534/386534 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 43782 event pairs, 697 based on Foata normal form. 1/6179 useless extension candidates. Maximal degree in co-relation 37734. Up to 5318 conditions per place. [2024-06-27 19:31:57,373 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 479 selfloop transitions, 127 changer transitions 0/614 dead transitions. [2024-06-27 19:31:57,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 614 transitions, 9202 flow [2024-06-27 19:31:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:31:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:31:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:31:57,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-27 19:31:57,374 INFO L175 Difference]: Start difference. First operand has 459 places, 596 transitions, 7946 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:31:57,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 614 transitions, 9202 flow [2024-06-27 19:32:00,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 614 transitions, 9031 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:00,967 INFO L231 Difference]: Finished difference. Result has 461 places, 596 transitions, 8036 flow [2024-06-27 19:32:00,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7775, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8036, PETRI_PLACES=461, PETRI_TRANSITIONS=596} [2024-06-27 19:32:00,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-27 19:32:00,967 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 596 transitions, 8036 flow [2024-06-27 19:32:00,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:00,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:00,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:00,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 19:32:00,968 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:00,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash -284483566, now seen corresponding path program 10 times [2024-06-27 19:32:00,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:00,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988233957] [2024-06-27 19:32:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:00,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:01,036 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 19:32:01,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:01,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988233957] [2024-06-27 19:32:01,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988233957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:01,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:01,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:01,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408799914] [2024-06-27 19:32:01,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:01,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:01,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:01,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:01,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 596 transitions, 8036 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:01,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:01,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:01,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:02,310 INFO L124 PetriNetUnfolderBase]: 3616/6195 cut-off events. [2024-06-27 19:32:02,310 INFO L125 PetriNetUnfolderBase]: For 392754/392754 co-relation queries the response was YES. [2024-06-27 19:32:02,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38277 conditions, 6195 events. 3616/6195 cut-off events. For 392754/392754 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 43870 event pairs, 697 based on Foata normal form. 1/6188 useless extension candidates. Maximal degree in co-relation 38078. Up to 4896 conditions per place. [2024-06-27 19:32:02,410 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 293 changer transitions 0/622 dead transitions. [2024-06-27 19:32:02,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 622 transitions, 9820 flow [2024-06-27 19:32:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:32:02,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:32:02,410 INFO L175 Difference]: Start difference. First operand has 461 places, 596 transitions, 8036 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:32:02,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 622 transitions, 9820 flow [2024-06-27 19:32:07,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 622 transitions, 9566 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:07,068 INFO L231 Difference]: Finished difference. Result has 462 places, 599 transitions, 8416 flow [2024-06-27 19:32:07,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7782, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8416, PETRI_PLACES=462, PETRI_TRANSITIONS=599} [2024-06-27 19:32:07,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-27 19:32:07,069 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 599 transitions, 8416 flow [2024-06-27 19:32:07,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:07,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:07,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:07,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 19:32:07,069 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:07,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:07,069 INFO L85 PathProgramCache]: Analyzing trace with hash 552570780, now seen corresponding path program 11 times [2024-06-27 19:32:07,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:07,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039311594] [2024-06-27 19:32:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:07,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:07,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:07,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039311594] [2024-06-27 19:32:07,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039311594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:07,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:07,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:07,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228408632] [2024-06-27 19:32:07,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:07,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:07,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:07,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:07,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 599 transitions, 8416 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:07,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:07,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:07,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:08,408 INFO L124 PetriNetUnfolderBase]: 3621/6204 cut-off events. [2024-06-27 19:32:08,408 INFO L125 PetriNetUnfolderBase]: For 401230/401230 co-relation queries the response was YES. [2024-06-27 19:32:08,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38861 conditions, 6204 events. 3621/6204 cut-off events. For 401230/401230 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 43973 event pairs, 697 based on Foata normal form. 1/6197 useless extension candidates. Maximal degree in co-relation 38661. Up to 4902 conditions per place. [2024-06-27 19:32:08,503 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 288 changer transitions 0/622 dead transitions. [2024-06-27 19:32:08,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 622 transitions, 10202 flow [2024-06-27 19:32:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:32:08,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:32:08,504 INFO L175 Difference]: Start difference. First operand has 462 places, 599 transitions, 8416 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:32:08,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 622 transitions, 10202 flow [2024-06-27 19:32:12,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 622 transitions, 9542 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:12,869 INFO L231 Difference]: Finished difference. Result has 464 places, 602 transitions, 8387 flow [2024-06-27 19:32:12,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7762, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8387, PETRI_PLACES=464, PETRI_TRANSITIONS=602} [2024-06-27 19:32:12,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-27 19:32:12,870 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 602 transitions, 8387 flow [2024-06-27 19:32:12,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:12,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:12,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:12,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 19:32:12,870 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:12,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:12,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1615306138, now seen corresponding path program 12 times [2024-06-27 19:32:12,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:12,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018110464] [2024-06-27 19:32:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:12,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:12,943 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 19:32:12,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:12,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018110464] [2024-06-27 19:32:12,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018110464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:12,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:12,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:12,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034582874] [2024-06-27 19:32:12,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:12,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:12,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:12,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:12,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 602 transitions, 8387 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:12,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:12,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:12,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:14,266 INFO L124 PetriNetUnfolderBase]: 3618/6200 cut-off events. [2024-06-27 19:32:14,267 INFO L125 PetriNetUnfolderBase]: For 400116/400116 co-relation queries the response was YES. [2024-06-27 19:32:14,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38703 conditions, 6200 events. 3618/6200 cut-off events. For 400116/400116 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 43950 event pairs, 697 based on Foata normal form. 1/6193 useless extension candidates. Maximal degree in co-relation 38502. Up to 4899 conditions per place. [2024-06-27 19:32:14,363 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 317 selfloop transitions, 296 changer transitions 0/621 dead transitions. [2024-06-27 19:32:14,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 621 transitions, 9893 flow [2024-06-27 19:32:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:32:14,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:32:14,364 INFO L175 Difference]: Start difference. First operand has 464 places, 602 transitions, 8387 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:32:14,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 621 transitions, 9893 flow [2024-06-27 19:32:18,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 621 transitions, 9313 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:18,660 INFO L231 Difference]: Finished difference. Result has 467 places, 602 transitions, 8405 flow [2024-06-27 19:32:18,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7807, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8405, PETRI_PLACES=467, PETRI_TRANSITIONS=602} [2024-06-27 19:32:18,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-27 19:32:18,661 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 602 transitions, 8405 flow [2024-06-27 19:32:18,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:18,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:18,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:18,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 19:32:18,661 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:18,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash -587102824, now seen corresponding path program 13 times [2024-06-27 19:32:18,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:18,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805937949] [2024-06-27 19:32:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:18,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:18,735 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 19:32:18,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:18,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805937949] [2024-06-27 19:32:18,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805937949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:18,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:18,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:18,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164039430] [2024-06-27 19:32:18,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:18,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:18,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:18,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:18,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:18,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 602 transitions, 8405 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:18,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:18,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:18,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:20,186 INFO L124 PetriNetUnfolderBase]: 3631/6222 cut-off events. [2024-06-27 19:32:20,186 INFO L125 PetriNetUnfolderBase]: For 413548/413548 co-relation queries the response was YES. [2024-06-27 19:32:20,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39001 conditions, 6222 events. 3631/6222 cut-off events. For 413548/413548 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 44166 event pairs, 697 based on Foata normal form. 1/6215 useless extension candidates. Maximal degree in co-relation 38799. Up to 5237 conditions per place. [2024-06-27 19:32:20,274 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 424 selfloop transitions, 195 changer transitions 0/627 dead transitions. [2024-06-27 19:32:20,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 627 transitions, 10257 flow [2024-06-27 19:32:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:32:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:32:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-27 19:32:20,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-27 19:32:20,275 INFO L175 Difference]: Start difference. First operand has 467 places, 602 transitions, 8405 flow. Second operand 10 states and 236 transitions. [2024-06-27 19:32:20,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 627 transitions, 10257 flow [2024-06-27 19:32:24,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 627 transitions, 8991 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 19:32:24,089 INFO L231 Difference]: Finished difference. Result has 466 places, 608 transitions, 7633 flow [2024-06-27 19:32:24,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7169, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7633, PETRI_PLACES=466, PETRI_TRANSITIONS=608} [2024-06-27 19:32:24,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-27 19:32:24,089 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 608 transitions, 7633 flow [2024-06-27 19:32:24,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:24,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:24,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:24,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 19:32:24,090 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:24,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1758989278, now seen corresponding path program 14 times [2024-06-27 19:32:24,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:24,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028978534] [2024-06-27 19:32:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:24,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:24,168 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 19:32:24,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:24,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028978534] [2024-06-27 19:32:24,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028978534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:24,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:24,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:24,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573156052] [2024-06-27 19:32:24,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:24,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:24,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:24,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:24,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:24,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:24,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 608 transitions, 7633 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:24,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:24,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:24,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:25,502 INFO L124 PetriNetUnfolderBase]: 3644/6244 cut-off events. [2024-06-27 19:32:25,503 INFO L125 PetriNetUnfolderBase]: For 420156/420156 co-relation queries the response was YES. [2024-06-27 19:32:25,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38582 conditions, 6244 events. 3644/6244 cut-off events. For 420156/420156 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44284 event pairs, 697 based on Foata normal form. 1/6237 useless extension candidates. Maximal degree in co-relation 38380. Up to 5252 conditions per place. [2024-06-27 19:32:25,603 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 423 selfloop transitions, 203 changer transitions 0/634 dead transitions. [2024-06-27 19:32:25,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 634 transitions, 9487 flow [2024-06-27 19:32:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:32:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:32:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-27 19:32:25,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-27 19:32:25,604 INFO L175 Difference]: Start difference. First operand has 466 places, 608 transitions, 7633 flow. Second operand 11 states and 253 transitions. [2024-06-27 19:32:25,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 634 transitions, 9487 flow [2024-06-27 19:32:29,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 634 transitions, 9061 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:29,715 INFO L231 Difference]: Finished difference. Result has 470 places, 614 transitions, 7699 flow [2024-06-27 19:32:29,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7219, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7699, PETRI_PLACES=470, PETRI_TRANSITIONS=614} [2024-06-27 19:32:29,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-27 19:32:29,716 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 614 transitions, 7699 flow [2024-06-27 19:32:29,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:29,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:29,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:29,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 19:32:29,716 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:29,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:29,717 INFO L85 PathProgramCache]: Analyzing trace with hash -592465204, now seen corresponding path program 15 times [2024-06-27 19:32:29,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:29,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601500884] [2024-06-27 19:32:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:29,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:29,787 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 19:32:29,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601500884] [2024-06-27 19:32:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601500884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:29,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:29,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:29,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789771134] [2024-06-27 19:32:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:29,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:29,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:29,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:29,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 614 transitions, 7699 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:29,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:29,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:29,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:31,122 INFO L124 PetriNetUnfolderBase]: 3641/6240 cut-off events. [2024-06-27 19:32:31,122 INFO L125 PetriNetUnfolderBase]: For 419223/419223 co-relation queries the response was YES. [2024-06-27 19:32:31,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38501 conditions, 6240 events. 3641/6240 cut-off events. For 419223/419223 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44304 event pairs, 697 based on Foata normal form. 1/6233 useless extension candidates. Maximal degree in co-relation 38298. Up to 5249 conditions per place. [2024-06-27 19:32:31,224 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 434 selfloop transitions, 189 changer transitions 0/631 dead transitions. [2024-06-27 19:32:31,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 631 transitions, 9465 flow [2024-06-27 19:32:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:31,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:31,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:32:31,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:32:31,225 INFO L175 Difference]: Start difference. First operand has 470 places, 614 transitions, 7699 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:32:31,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 631 transitions, 9465 flow [2024-06-27 19:32:35,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 631 transitions, 9093 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:35,379 INFO L231 Difference]: Finished difference. Result has 471 places, 614 transitions, 7711 flow [2024-06-27 19:32:35,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7711, PETRI_PLACES=471, PETRI_TRANSITIONS=614} [2024-06-27 19:32:35,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-27 19:32:35,380 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 614 transitions, 7711 flow [2024-06-27 19:32:35,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:35,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:35,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:35,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 19:32:35,380 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:35,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1753448338, now seen corresponding path program 16 times [2024-06-27 19:32:35,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:35,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689576559] [2024-06-27 19:32:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:35,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:35,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:35,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689576559] [2024-06-27 19:32:35,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689576559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:35,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:35,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:35,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538595649] [2024-06-27 19:32:35,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:35,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:35,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:35,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:35,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 614 transitions, 7711 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:35,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:35,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:35,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:36,774 INFO L124 PetriNetUnfolderBase]: 3638/6236 cut-off events. [2024-06-27 19:32:36,774 INFO L125 PetriNetUnfolderBase]: For 418605/418605 co-relation queries the response was YES. [2024-06-27 19:32:36,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38410 conditions, 6236 events. 3638/6236 cut-off events. For 418605/418605 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44283 event pairs, 697 based on Foata normal form. 1/6229 useless extension candidates. Maximal degree in co-relation 38206. Up to 5246 conditions per place. [2024-06-27 19:32:36,872 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 440 selfloop transitions, 182 changer transitions 0/630 dead transitions. [2024-06-27 19:32:36,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 630 transitions, 9235 flow [2024-06-27 19:32:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:32:36,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:32:36,873 INFO L175 Difference]: Start difference. First operand has 471 places, 614 transitions, 7711 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:32:36,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 630 transitions, 9235 flow [2024-06-27 19:32:40,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 630 transitions, 8851 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:40,265 INFO L231 Difference]: Finished difference. Result has 472 places, 614 transitions, 7700 flow [2024-06-27 19:32:40,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7700, PETRI_PLACES=472, PETRI_TRANSITIONS=614} [2024-06-27 19:32:40,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-27 19:32:40,266 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 614 transitions, 7700 flow [2024-06-27 19:32:40,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:40,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:40,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:40,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 19:32:40,266 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:40,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:40,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1747024828, now seen corresponding path program 17 times [2024-06-27 19:32:40,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:40,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209437094] [2024-06-27 19:32:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:40,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:40,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209437094] [2024-06-27 19:32:40,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209437094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:40,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:40,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:40,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93974608] [2024-06-27 19:32:40,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:40,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:40,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:40,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:40,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 614 transitions, 7700 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:40,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:40,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:40,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:41,782 INFO L124 PetriNetUnfolderBase]: 3635/6232 cut-off events. [2024-06-27 19:32:41,782 INFO L125 PetriNetUnfolderBase]: For 417572/417572 co-relation queries the response was YES. [2024-06-27 19:32:41,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38310 conditions, 6232 events. 3635/6232 cut-off events. For 417572/417572 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44231 event pairs, 697 based on Foata normal form. 1/6225 useless extension candidates. Maximal degree in co-relation 38105. Up to 5243 conditions per place. [2024-06-27 19:32:41,873 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 433 selfloop transitions, 192 changer transitions 0/633 dead transitions. [2024-06-27 19:32:41,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 633 transitions, 9238 flow [2024-06-27 19:32:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:32:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:32:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-27 19:32:41,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543237250554324 [2024-06-27 19:32:41,874 INFO L175 Difference]: Start difference. First operand has 472 places, 614 transitions, 7700 flow. Second operand 11 states and 250 transitions. [2024-06-27 19:32:41,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 633 transitions, 9238 flow [2024-06-27 19:32:45,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 633 transitions, 8927 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:45,237 INFO L231 Difference]: Finished difference. Result has 478 places, 614 transitions, 7779 flow [2024-06-27 19:32:45,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7389, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7779, PETRI_PLACES=478, PETRI_TRANSITIONS=614} [2024-06-27 19:32:45,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-27 19:32:45,238 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 614 transitions, 7779 flow [2024-06-27 19:32:45,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:45,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:45,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:45,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 19:32:45,238 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:45,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:45,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1747019248, now seen corresponding path program 18 times [2024-06-27 19:32:45,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:45,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025897999] [2024-06-27 19:32:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:45,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:45,326 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 19:32:45,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:45,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025897999] [2024-06-27 19:32:45,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025897999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:45,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:45,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:45,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406834451] [2024-06-27 19:32:45,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:45,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:45,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:45,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:45,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:45,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:45,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 614 transitions, 7779 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:45,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:45,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:45,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:46,664 INFO L124 PetriNetUnfolderBase]: 3632/6228 cut-off events. [2024-06-27 19:32:46,665 INFO L125 PetriNetUnfolderBase]: For 416678/416678 co-relation queries the response was YES. [2024-06-27 19:32:46,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38266 conditions, 6228 events. 3632/6228 cut-off events. For 416678/416678 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44195 event pairs, 697 based on Foata normal form. 1/6221 useless extension candidates. Maximal degree in co-relation 38060. Up to 5240 conditions per place. [2024-06-27 19:32:46,765 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 185 changer transitions 0/631 dead transitions. [2024-06-27 19:32:46,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 631 transitions, 9065 flow [2024-06-27 19:32:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:32:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:32:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:32:46,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-27 19:32:46,766 INFO L175 Difference]: Start difference. First operand has 478 places, 614 transitions, 7779 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:32:46,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 631 transitions, 9065 flow [2024-06-27 19:32:50,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 631 transitions, 8478 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-27 19:32:50,461 INFO L231 Difference]: Finished difference. Result has 476 places, 614 transitions, 7570 flow [2024-06-27 19:32:50,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7192, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7570, PETRI_PLACES=476, PETRI_TRANSITIONS=614} [2024-06-27 19:32:50,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-27 19:32:50,461 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 614 transitions, 7570 flow [2024-06-27 19:32:50,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:50,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:50,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:50,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 19:32:50,462 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:50,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash 790941952, now seen corresponding path program 19 times [2024-06-27 19:32:50,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:50,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582657808] [2024-06-27 19:32:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:50,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:50,534 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 19:32:50,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:50,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582657808] [2024-06-27 19:32:50,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582657808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:50,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:50,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:50,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12160635] [2024-06-27 19:32:50,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:50,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:50,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:50,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:50,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:50,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:50,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 614 transitions, 7570 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:50,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:50,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:50,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:51,880 INFO L124 PetriNetUnfolderBase]: 3645/6251 cut-off events. [2024-06-27 19:32:51,880 INFO L125 PetriNetUnfolderBase]: For 432162/432165 co-relation queries the response was YES. [2024-06-27 19:32:51,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38185 conditions, 6251 events. 3645/6251 cut-off events. For 432162/432165 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 44491 event pairs, 745 based on Foata normal form. 3/6243 useless extension candidates. Maximal degree in co-relation 37979. Up to 5022 conditions per place. [2024-06-27 19:32:51,981 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 310 changer transitions 0/638 dead transitions. [2024-06-27 19:32:51,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 638 transitions, 9438 flow [2024-06-27 19:32:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:32:51,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-27 19:32:51,982 INFO L175 Difference]: Start difference. First operand has 476 places, 614 transitions, 7570 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:32:51,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 638 transitions, 9438 flow [2024-06-27 19:32:55,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 638 transitions, 8995 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 19:32:55,412 INFO L231 Difference]: Finished difference. Result has 475 places, 620 transitions, 7823 flow [2024-06-27 19:32:55,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7127, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7823, PETRI_PLACES=475, PETRI_TRANSITIONS=620} [2024-06-27 19:32:55,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-27 19:32:55,413 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 620 transitions, 7823 flow [2024-06-27 19:32:55,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:55,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:55,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:55,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-27 19:32:55,413 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:55,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:55,413 INFO L85 PathProgramCache]: Analyzing trace with hash 792809676, now seen corresponding path program 20 times [2024-06-27 19:32:55,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:55,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590652589] [2024-06-27 19:32:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:55,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:55,485 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 19:32:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590652589] [2024-06-27 19:32:55,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590652589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:55,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:55,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:55,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606228283] [2024-06-27 19:32:55,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:55,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:55,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:55,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:55,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 620 transitions, 7823 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:32:55,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:55,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:55,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:56,836 INFO L124 PetriNetUnfolderBase]: 3642/6247 cut-off events. [2024-06-27 19:32:56,836 INFO L125 PetriNetUnfolderBase]: For 431162/431165 co-relation queries the response was YES. [2024-06-27 19:32:56,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38380 conditions, 6247 events. 3642/6247 cut-off events. For 431162/431165 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 44463 event pairs, 745 based on Foata normal form. 3/6239 useless extension candidates. Maximal degree in co-relation 38173. Up to 5019 conditions per place. [2024-06-27 19:32:56,940 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 311 changer transitions 0/639 dead transitions. [2024-06-27 19:32:56,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 639 transitions, 9379 flow [2024-06-27 19:32:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:32:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:32:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-27 19:32:56,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587583148558758 [2024-06-27 19:32:56,941 INFO L175 Difference]: Start difference. First operand has 475 places, 620 transitions, 7823 flow. Second operand 11 states and 252 transitions. [2024-06-27 19:32:56,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 639 transitions, 9379 flow [2024-06-27 19:33:00,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 639 transitions, 8705 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:00,724 INFO L231 Difference]: Finished difference. Result has 480 places, 620 transitions, 7777 flow [2024-06-27 19:33:00,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7149, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7777, PETRI_PLACES=480, PETRI_TRANSITIONS=620} [2024-06-27 19:33:00,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-27 19:33:00,725 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 620 transitions, 7777 flow [2024-06-27 19:33:00,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:00,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:00,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:00,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-27 19:33:00,726 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:00,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:00,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1979026402, now seen corresponding path program 21 times [2024-06-27 19:33:00,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:00,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389951555] [2024-06-27 19:33:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:00,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:00,791 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 19:33:00,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389951555] [2024-06-27 19:33:00,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389951555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:00,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:00,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:00,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366772306] [2024-06-27 19:33:00,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:00,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:00,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:00,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:00,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:00,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 620 transitions, 7777 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:00,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:00,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:00,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:02,191 INFO L124 PetriNetUnfolderBase]: 3655/6268 cut-off events. [2024-06-27 19:33:02,191 INFO L125 PetriNetUnfolderBase]: For 443477/443477 co-relation queries the response was YES. [2024-06-27 19:33:02,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38619 conditions, 6268 events. 3655/6268 cut-off events. For 443477/443477 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 44589 event pairs, 697 based on Foata normal form. 1/6261 useless extension candidates. Maximal degree in co-relation 38411. Up to 5034 conditions per place. [2024-06-27 19:33:02,287 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 317 changer transitions 0/647 dead transitions. [2024-06-27 19:33:02,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 647 transitions, 9683 flow [2024-06-27 19:33:02,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 19:33:02,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-27 19:33:02,288 INFO L175 Difference]: Start difference. First operand has 480 places, 620 transitions, 7777 flow. Second operand 9 states and 218 transitions. [2024-06-27 19:33:02,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 647 transitions, 9683 flow [2024-06-27 19:33:06,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 647 transitions, 9040 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 19:33:06,256 INFO L231 Difference]: Finished difference. Result has 479 places, 626 transitions, 7852 flow [2024-06-27 19:33:06,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7146, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7852, PETRI_PLACES=479, PETRI_TRANSITIONS=626} [2024-06-27 19:33:06,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-27 19:33:06,256 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 626 transitions, 7852 flow [2024-06-27 19:33:06,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:06,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:06,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:06,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-27 19:33:06,257 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:06,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:06,257 INFO L85 PathProgramCache]: Analyzing trace with hash 593329326, now seen corresponding path program 22 times [2024-06-27 19:33:06,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:06,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042754281] [2024-06-27 19:33:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:06,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:06,328 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 19:33:06,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:06,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042754281] [2024-06-27 19:33:06,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042754281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:06,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:06,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:06,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827299457] [2024-06-27 19:33:06,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:06,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:06,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:06,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:06,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:06,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:06,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 626 transitions, 7852 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:06,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:06,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:06,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:07,690 INFO L124 PetriNetUnfolderBase]: 3660/6277 cut-off events. [2024-06-27 19:33:07,690 INFO L125 PetriNetUnfolderBase]: For 450069/450069 co-relation queries the response was YES. [2024-06-27 19:33:07,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38734 conditions, 6277 events. 3660/6277 cut-off events. For 450069/450069 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 44653 event pairs, 697 based on Foata normal form. 1/6270 useless extension candidates. Maximal degree in co-relation 38525. Up to 5040 conditions per place. [2024-06-27 19:33:07,792 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 357 selfloop transitions, 286 changer transitions 0/651 dead transitions. [2024-06-27 19:33:07,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 651 transitions, 9737 flow [2024-06-27 19:33:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:33:07,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:33:07,793 INFO L175 Difference]: Start difference. First operand has 479 places, 626 transitions, 7852 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:33:07,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 651 transitions, 9737 flow [2024-06-27 19:33:11,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 651 transitions, 9081 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:11,200 INFO L231 Difference]: Finished difference. Result has 479 places, 629 transitions, 7825 flow [2024-06-27 19:33:11,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7206, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7825, PETRI_PLACES=479, PETRI_TRANSITIONS=629} [2024-06-27 19:33:11,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-27 19:33:11,200 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 629 transitions, 7825 flow [2024-06-27 19:33:11,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:11,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:11,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:11,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-27 19:33:11,200 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:11,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:11,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2138475880, now seen corresponding path program 23 times [2024-06-27 19:33:11,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:11,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921018984] [2024-06-27 19:33:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:11,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:11,272 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 19:33:11,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:11,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921018984] [2024-06-27 19:33:11,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921018984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:11,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:11,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:11,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182065611] [2024-06-27 19:33:11,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:11,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:11,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:11,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:11,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:11,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:11,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 629 transitions, 7825 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:11,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:11,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:11,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:12,612 INFO L124 PetriNetUnfolderBase]: 3665/6286 cut-off events. [2024-06-27 19:33:12,612 INFO L125 PetriNetUnfolderBase]: For 450112/450112 co-relation queries the response was YES. [2024-06-27 19:33:12,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38729 conditions, 6286 events. 3665/6286 cut-off events. For 450112/450112 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 44729 event pairs, 697 based on Foata normal form. 1/6279 useless extension candidates. Maximal degree in co-relation 38520. Up to 5046 conditions per place. [2024-06-27 19:33:12,717 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 327 changer transitions 0/654 dead transitions. [2024-06-27 19:33:12,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 654 transitions, 9714 flow [2024-06-27 19:33:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-27 19:33:12,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-27 19:33:12,718 INFO L175 Difference]: Start difference. First operand has 479 places, 629 transitions, 7825 flow. Second operand 10 states and 235 transitions. [2024-06-27 19:33:12,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 654 transitions, 9714 flow [2024-06-27 19:33:16,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 654 transitions, 9109 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:16,393 INFO L231 Difference]: Finished difference. Result has 483 places, 632 transitions, 7925 flow [2024-06-27 19:33:16,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7230, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7925, PETRI_PLACES=483, PETRI_TRANSITIONS=632} [2024-06-27 19:33:16,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-27 19:33:16,393 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 632 transitions, 7925 flow [2024-06-27 19:33:16,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:16,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:16,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:16,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-27 19:33:16,394 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:16,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:16,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2138308480, now seen corresponding path program 24 times [2024-06-27 19:33:16,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:16,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119388147] [2024-06-27 19:33:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:16,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:16,470 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 19:33:16,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:16,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119388147] [2024-06-27 19:33:16,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119388147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:16,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:16,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:16,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262329584] [2024-06-27 19:33:16,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:16,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:16,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:16,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:16,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:16,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 632 transitions, 7925 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:16,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:16,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:16,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:17,767 INFO L124 PetriNetUnfolderBase]: 3662/6282 cut-off events. [2024-06-27 19:33:17,767 INFO L125 PetriNetUnfolderBase]: For 441952/441952 co-relation queries the response was YES. [2024-06-27 19:33:17,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38637 conditions, 6282 events. 3662/6282 cut-off events. For 441952/441952 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 44730 event pairs, 697 based on Foata normal form. 1/6275 useless extension candidates. Maximal degree in co-relation 38428. Up to 5043 conditions per place. [2024-06-27 19:33:17,866 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 344 selfloop transitions, 299 changer transitions 0/651 dead transitions. [2024-06-27 19:33:17,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 651 transitions, 9765 flow [2024-06-27 19:33:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:33:17,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:33:17,867 INFO L175 Difference]: Start difference. First operand has 483 places, 632 transitions, 7925 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:33:17,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 651 transitions, 9765 flow [2024-06-27 19:33:20,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 651 transitions, 9125 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:20,969 INFO L231 Difference]: Finished difference. Result has 482 places, 632 transitions, 7897 flow [2024-06-27 19:33:20,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7289, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7897, PETRI_PLACES=482, PETRI_TRANSITIONS=632} [2024-06-27 19:33:20,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-27 19:33:20,970 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 632 transitions, 7897 flow [2024-06-27 19:33:20,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:20,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:20,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:20,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-27 19:33:20,970 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:20,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:20,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2138124340, now seen corresponding path program 25 times [2024-06-27 19:33:20,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:20,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551231799] [2024-06-27 19:33:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:20,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:21,042 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 19:33:21,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:21,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551231799] [2024-06-27 19:33:21,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551231799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:21,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:21,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:21,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399503360] [2024-06-27 19:33:21,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:21,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:21,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:21,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:21,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:21,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 632 transitions, 7897 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:21,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:21,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:21,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:22,476 INFO L124 PetriNetUnfolderBase]: 3659/6278 cut-off events. [2024-06-27 19:33:22,476 INFO L125 PetriNetUnfolderBase]: For 434014/434014 co-relation queries the response was YES. [2024-06-27 19:33:22,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38457 conditions, 6278 events. 3659/6278 cut-off events. For 434014/434014 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 44719 event pairs, 697 based on Foata normal form. 1/6271 useless extension candidates. Maximal degree in co-relation 38248. Up to 5040 conditions per place. [2024-06-27 19:33:22,571 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 353 selfloop transitions, 300 changer transitions 0/661 dead transitions. [2024-06-27 19:33:22,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 661 transitions, 9529 flow [2024-06-27 19:33:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:33:22,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-27 19:33:22,572 INFO L175 Difference]: Start difference. First operand has 482 places, 632 transitions, 7897 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:33:22,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 661 transitions, 9529 flow [2024-06-27 19:33:26,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 661 transitions, 8901 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:26,275 INFO L231 Difference]: Finished difference. Result has 484 places, 632 transitions, 7890 flow [2024-06-27 19:33:26,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7271, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7890, PETRI_PLACES=484, PETRI_TRANSITIONS=632} [2024-06-27 19:33:26,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-27 19:33:26,276 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 632 transitions, 7890 flow [2024-06-27 19:33:26,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:26,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:26,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:26,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-27 19:33:26,276 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:26,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:26,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2138129920, now seen corresponding path program 26 times [2024-06-27 19:33:26,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:26,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895317073] [2024-06-27 19:33:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:26,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:26,359 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 19:33:26,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:26,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895317073] [2024-06-27 19:33:26,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895317073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:26,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:26,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:26,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461303883] [2024-06-27 19:33:26,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:26,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:26,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:26,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:26,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:26,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 632 transitions, 7890 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:26,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:26,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:26,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:27,741 INFO L124 PetriNetUnfolderBase]: 3656/6274 cut-off events. [2024-06-27 19:33:27,741 INFO L125 PetriNetUnfolderBase]: For 425752/425752 co-relation queries the response was YES. [2024-06-27 19:33:27,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38339 conditions, 6274 events. 3656/6274 cut-off events. For 425752/425752 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 44627 event pairs, 697 based on Foata normal form. 1/6267 useless extension candidates. Maximal degree in co-relation 38130. Up to 5037 conditions per place. [2024-06-27 19:33:27,843 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 334 selfloop transitions, 316 changer transitions 0/658 dead transitions. [2024-06-27 19:33:27,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 658 transitions, 9254 flow [2024-06-27 19:33:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-27 19:33:27,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-27 19:33:27,844 INFO L175 Difference]: Start difference. First operand has 484 places, 632 transitions, 7890 flow. Second operand 10 states and 239 transitions. [2024-06-27 19:33:27,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 658 transitions, 9254 flow [2024-06-27 19:33:31,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 658 transitions, 8586 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 19:33:31,039 INFO L231 Difference]: Finished difference. Result has 484 places, 632 transitions, 7868 flow [2024-06-27 19:33:31,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7222, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7868, PETRI_PLACES=484, PETRI_TRANSITIONS=632} [2024-06-27 19:33:31,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-27 19:33:31,040 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 632 transitions, 7868 flow [2024-06-27 19:33:31,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:31,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:31,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:31,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-27 19:33:31,040 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:31,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:31,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1788585374, now seen corresponding path program 1 times [2024-06-27 19:33:31,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:31,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881094124] [2024-06-27 19:33:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:31,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:31,121 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 19:33:31,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:31,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881094124] [2024-06-27 19:33:31,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881094124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:31,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:31,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:31,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390302211] [2024-06-27 19:33:31,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:31,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:31,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:31,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:31,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 632 transitions, 7868 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:31,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:31,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:31,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:32,495 INFO L124 PetriNetUnfolderBase]: 3676/6323 cut-off events. [2024-06-27 19:33:32,495 INFO L125 PetriNetUnfolderBase]: For 458844/458844 co-relation queries the response was YES. [2024-06-27 19:33:32,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38575 conditions, 6323 events. 3676/6323 cut-off events. For 458844/458844 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 45069 event pairs, 693 based on Foata normal form. 6/6324 useless extension candidates. Maximal degree in co-relation 38367. Up to 5433 conditions per place. [2024-06-27 19:33:32,601 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 570 selfloop transitions, 79 changer transitions 0/657 dead transitions. [2024-06-27 19:33:32,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 657 transitions, 9294 flow [2024-06-27 19:33:32,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:33:32,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-27 19:33:32,601 INFO L175 Difference]: Start difference. First operand has 484 places, 632 transitions, 7868 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:33:32,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 657 transitions, 9294 flow [2024-06-27 19:33:35,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 657 transitions, 8468 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-27 19:33:35,992 INFO L231 Difference]: Finished difference. Result has 481 places, 633 transitions, 7240 flow [2024-06-27 19:33:35,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7042, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7240, PETRI_PLACES=481, PETRI_TRANSITIONS=633} [2024-06-27 19:33:35,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-27 19:33:35,992 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 633 transitions, 7240 flow [2024-06-27 19:33:35,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:35,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:35,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:35,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-27 19:33:35,993 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:35,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:35,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1623654832, now seen corresponding path program 2 times [2024-06-27 19:33:35,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:35,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330287126] [2024-06-27 19:33:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:36,073 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 19:33:36,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:36,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330287126] [2024-06-27 19:33:36,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330287126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:36,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:36,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:36,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186668808] [2024-06-27 19:33:36,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:36,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:36,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:36,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:36,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:36,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:36,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 633 transitions, 7240 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:36,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:36,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:36,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:37,423 INFO L124 PetriNetUnfolderBase]: 3729/6410 cut-off events. [2024-06-27 19:33:37,424 INFO L125 PetriNetUnfolderBase]: For 500197/500197 co-relation queries the response was YES. [2024-06-27 19:33:37,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39330 conditions, 6410 events. 3729/6410 cut-off events. For 500197/500197 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 45788 event pairs, 685 based on Foata normal form. 6/6411 useless extension candidates. Maximal degree in co-relation 39123. Up to 5089 conditions per place. [2024-06-27 19:33:37,525 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 571 selfloop transitions, 83 changer transitions 0/662 dead transitions. [2024-06-27 19:33:37,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 662 transitions, 8984 flow [2024-06-27 19:33:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:37,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 19:33:37,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-27 19:33:37,528 INFO L175 Difference]: Start difference. First operand has 481 places, 633 transitions, 7240 flow. Second operand 9 states and 214 transitions. [2024-06-27 19:33:37,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 662 transitions, 8984 flow [2024-06-27 19:33:41,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 662 transitions, 8800 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:41,128 INFO L231 Difference]: Finished difference. Result has 482 places, 635 transitions, 7300 flow [2024-06-27 19:33:41,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7056, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7300, PETRI_PLACES=482, PETRI_TRANSITIONS=635} [2024-06-27 19:33:41,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-27 19:33:41,128 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 635 transitions, 7300 flow [2024-06-27 19:33:41,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:41,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:41,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:41,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-27 19:33:41,128 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:41,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:41,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2034031202, now seen corresponding path program 3 times [2024-06-27 19:33:41,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:41,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778429298] [2024-06-27 19:33:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:41,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:41,207 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 19:33:41,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:41,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778429298] [2024-06-27 19:33:41,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778429298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:41,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:41,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:41,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644600239] [2024-06-27 19:33:41,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:41,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:41,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:41,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:41,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:41,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:41,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 635 transitions, 7300 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:41,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:41,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:41,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:42,612 INFO L124 PetriNetUnfolderBase]: 3716/6393 cut-off events. [2024-06-27 19:33:42,612 INFO L125 PetriNetUnfolderBase]: For 461663/461663 co-relation queries the response was YES. [2024-06-27 19:33:42,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38459 conditions, 6393 events. 3716/6393 cut-off events. For 461663/461663 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 45642 event pairs, 671 based on Foata normal form. 6/6394 useless extension candidates. Maximal degree in co-relation 38251. Up to 5083 conditions per place. [2024-06-27 19:33:42,711 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 567 selfloop transitions, 87 changer transitions 0/662 dead transitions. [2024-06-27 19:33:42,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 662 transitions, 8734 flow [2024-06-27 19:33:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:33:42,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-27 19:33:42,712 INFO L175 Difference]: Start difference. First operand has 482 places, 635 transitions, 7300 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:33:42,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 662 transitions, 8734 flow [2024-06-27 19:33:46,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 662 transitions, 8575 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:46,186 INFO L231 Difference]: Finished difference. Result has 486 places, 635 transitions, 7319 flow [2024-06-27 19:33:46,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7319, PETRI_PLACES=486, PETRI_TRANSITIONS=635} [2024-06-27 19:33:46,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-27 19:33:46,187 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 635 transitions, 7319 flow [2024-06-27 19:33:46,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:46,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:46,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:46,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-27 19:33:46,187 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:46,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:46,187 INFO L85 PathProgramCache]: Analyzing trace with hash -687471556, now seen corresponding path program 4 times [2024-06-27 19:33:46,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:46,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442689355] [2024-06-27 19:33:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:46,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:46,268 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 19:33:46,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:46,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442689355] [2024-06-27 19:33:46,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442689355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:46,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:46,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:46,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703674543] [2024-06-27 19:33:46,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:46,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:46,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 635 transitions, 7319 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:46,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:46,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:46,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:47,761 INFO L124 PetriNetUnfolderBase]: 3736/6421 cut-off events. [2024-06-27 19:33:47,761 INFO L125 PetriNetUnfolderBase]: For 467195/467195 co-relation queries the response was YES. [2024-06-27 19:33:47,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38864 conditions, 6421 events. 3736/6421 cut-off events. For 467195/467195 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 45839 event pairs, 691 based on Foata normal form. 6/6422 useless extension candidates. Maximal degree in co-relation 38654. Up to 5293 conditions per place. [2024-06-27 19:33:47,855 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 528 selfloop transitions, 135 changer transitions 0/671 dead transitions. [2024-06-27 19:33:47,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 671 transitions, 8807 flow [2024-06-27 19:33:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:33:47,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-27 19:33:47,856 INFO L175 Difference]: Start difference. First operand has 486 places, 635 transitions, 7319 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:33:47,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 671 transitions, 8807 flow [2024-06-27 19:33:51,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 671 transitions, 8622 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:51,420 INFO L231 Difference]: Finished difference. Result has 487 places, 636 transitions, 7450 flow [2024-06-27 19:33:51,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7134, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7450, PETRI_PLACES=487, PETRI_TRANSITIONS=636} [2024-06-27 19:33:51,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-27 19:33:51,420 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 636 transitions, 7450 flow [2024-06-27 19:33:51,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:51,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:51,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:51,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-27 19:33:51,422 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:51,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash 873389268, now seen corresponding path program 5 times [2024-06-27 19:33:51,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:51,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019583799] [2024-06-27 19:33:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:51,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:51,501 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 19:33:51,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:51,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019583799] [2024-06-27 19:33:51,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019583799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:51,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:51,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:51,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345362351] [2024-06-27 19:33:51,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:51,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:51,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:51,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:51,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:51,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:51,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 636 transitions, 7450 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:51,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:51,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:51,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:52,961 INFO L124 PetriNetUnfolderBase]: 3822/6591 cut-off events. [2024-06-27 19:33:52,961 INFO L125 PetriNetUnfolderBase]: For 578201/578201 co-relation queries the response was YES. [2024-06-27 19:33:53,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41852 conditions, 6591 events. 3822/6591 cut-off events. For 578201/578201 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 47315 event pairs, 575 based on Foata normal form. 6/6592 useless extension candidates. Maximal degree in co-relation 41641. Up to 4302 conditions per place. [2024-06-27 19:33:53,069 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 511 selfloop transitions, 157 changer transitions 0/676 dead transitions. [2024-06-27 19:33:53,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 676 transitions, 9570 flow [2024-06-27 19:33:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 19:33:53,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:33:53,070 INFO L175 Difference]: Start difference. First operand has 487 places, 636 transitions, 7450 flow. Second operand 8 states and 208 transitions. [2024-06-27 19:33:53,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 676 transitions, 9570 flow [2024-06-27 19:33:57,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 676 transitions, 9262 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:57,839 INFO L231 Difference]: Finished difference. Result has 488 places, 639 transitions, 7588 flow [2024-06-27 19:33:57,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7152, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7588, PETRI_PLACES=488, PETRI_TRANSITIONS=639} [2024-06-27 19:33:57,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-27 19:33:57,839 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 639 transitions, 7588 flow [2024-06-27 19:33:57,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:57,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:57,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:57,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-27 19:33:57,840 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:57,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2016720990, now seen corresponding path program 6 times [2024-06-27 19:33:57,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:57,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271680971] [2024-06-27 19:33:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:57,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:57,920 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 19:33:57,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:57,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271680971] [2024-06-27 19:33:57,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271680971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:57,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:57,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:57,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648952480] [2024-06-27 19:33:57,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:57,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:57,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:57,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:57,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:57,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:57,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 639 transitions, 7588 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:33:57,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:57,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:57,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:59,478 INFO L124 PetriNetUnfolderBase]: 3809/6560 cut-off events. [2024-06-27 19:33:59,479 INFO L125 PetriNetUnfolderBase]: For 529928/529931 co-relation queries the response was YES. [2024-06-27 19:33:59,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41167 conditions, 6560 events. 3809/6560 cut-off events. For 529928/529931 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 47180 event pairs, 735 based on Foata normal form. 8/6558 useless extension candidates. Maximal degree in co-relation 40955. Up to 5564 conditions per place. [2024-06-27 19:33:59,592 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 539 selfloop transitions, 134 changer transitions 0/681 dead transitions. [2024-06-27 19:33:59,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 681 transitions, 9076 flow [2024-06-27 19:33:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-27 19:33:59,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-27 19:33:59,593 INFO L175 Difference]: Start difference. First operand has 488 places, 639 transitions, 7588 flow. Second operand 10 states and 254 transitions. [2024-06-27 19:33:59,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 681 transitions, 9076 flow [2024-06-27 19:34:03,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 681 transitions, 8917 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:03,866 INFO L231 Difference]: Finished difference. Result has 493 places, 639 transitions, 7701 flow [2024-06-27 19:34:03,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7429, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7701, PETRI_PLACES=493, PETRI_TRANSITIONS=639} [2024-06-27 19:34:03,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-27 19:34:03,866 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 639 transitions, 7701 flow [2024-06-27 19:34:03,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:03,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:03,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:03,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-27 19:34:03,867 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:03,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:03,867 INFO L85 PathProgramCache]: Analyzing trace with hash -952803072, now seen corresponding path program 7 times [2024-06-27 19:34:03,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:03,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487923546] [2024-06-27 19:34:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:03,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:03,946 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 19:34:03,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:03,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487923546] [2024-06-27 19:34:03,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487923546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:03,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:03,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:03,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275872976] [2024-06-27 19:34:03,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:03,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:03,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:03,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:03,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:03,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:03,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 639 transitions, 7701 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:03,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:03,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:03,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:05,406 INFO L124 PetriNetUnfolderBase]: 3829/6584 cut-off events. [2024-06-27 19:34:05,406 INFO L125 PetriNetUnfolderBase]: For 529250/529253 co-relation queries the response was YES. [2024-06-27 19:34:05,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41577 conditions, 6584 events. 3829/6584 cut-off events. For 529250/529253 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 47270 event pairs, 723 based on Foata normal form. 8/6582 useless extension candidates. Maximal degree in co-relation 41365. Up to 5304 conditions per place. [2024-06-27 19:34:05,505 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 515 selfloop transitions, 153 changer transitions 0/676 dead transitions. [2024-06-27 19:34:05,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 676 transitions, 9201 flow [2024-06-27 19:34:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:05,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:34:05,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-27 19:34:05,506 INFO L175 Difference]: Start difference. First operand has 493 places, 639 transitions, 7701 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:34:05,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 676 transitions, 9201 flow [2024-06-27 19:34:10,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 676 transitions, 8820 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 19:34:10,214 INFO L231 Difference]: Finished difference. Result has 493 places, 640 transitions, 7670 flow [2024-06-27 19:34:10,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7320, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7670, PETRI_PLACES=493, PETRI_TRANSITIONS=640} [2024-06-27 19:34:10,214 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-27 19:34:10,214 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 640 transitions, 7670 flow [2024-06-27 19:34:10,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:10,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:10,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:10,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-27 19:34:10,215 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:10,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:10,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1164951632, now seen corresponding path program 8 times [2024-06-27 19:34:10,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:10,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291548838] [2024-06-27 19:34:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:10,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:10,293 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 19:34:10,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:10,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291548838] [2024-06-27 19:34:10,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291548838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:10,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:10,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:10,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715701094] [2024-06-27 19:34:10,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:10,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:10,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:10,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:10,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:10,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:10,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 640 transitions, 7670 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:10,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:10,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:10,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:11,829 INFO L124 PetriNetUnfolderBase]: 3816/6580 cut-off events. [2024-06-27 19:34:11,829 INFO L125 PetriNetUnfolderBase]: For 484179/484179 co-relation queries the response was YES. [2024-06-27 19:34:11,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40630 conditions, 6580 events. 3816/6580 cut-off events. For 484179/484179 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 47233 event pairs, 565 based on Foata normal form. 6/6581 useless extension candidates. Maximal degree in co-relation 40417. Up to 4322 conditions per place. [2024-06-27 19:34:11,927 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 515 selfloop transitions, 148 changer transitions 0/671 dead transitions. [2024-06-27 19:34:11,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 671 transitions, 9122 flow [2024-06-27 19:34:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:34:11,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:34:11,928 INFO L175 Difference]: Start difference. First operand has 493 places, 640 transitions, 7670 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:34:11,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 671 transitions, 9122 flow [2024-06-27 19:34:16,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 671 transitions, 8768 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:16,378 INFO L231 Difference]: Finished difference. Result has 494 places, 640 transitions, 7619 flow [2024-06-27 19:34:16,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7316, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7619, PETRI_PLACES=494, PETRI_TRANSITIONS=640} [2024-06-27 19:34:16,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-27 19:34:16,378 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 640 transitions, 7619 flow [2024-06-27 19:34:16,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:16,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:16,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:16,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-27 19:34:16,379 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:16,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:16,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1206452130, now seen corresponding path program 9 times [2024-06-27 19:34:16,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:16,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6610160] [2024-06-27 19:34:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:16,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:16,450 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 19:34:16,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:16,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6610160] [2024-06-27 19:34:16,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6610160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:16,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:16,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:16,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201151683] [2024-06-27 19:34:16,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:16,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:16,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:16,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:16,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:16,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 640 transitions, 7619 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:16,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:16,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:16,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:17,854 INFO L124 PetriNetUnfolderBase]: 3836/6624 cut-off events. [2024-06-27 19:34:17,854 INFO L125 PetriNetUnfolderBase]: For 492979/492982 co-relation queries the response was YES. [2024-06-27 19:34:17,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40969 conditions, 6624 events. 3836/6624 cut-off events. For 492979/492982 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 47737 event pairs, 574 based on Foata normal form. 8/6625 useless extension candidates. Maximal degree in co-relation 40755. Up to 4143 conditions per place. [2024-06-27 19:34:17,959 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 502 selfloop transitions, 165 changer transitions 0/675 dead transitions. [2024-06-27 19:34:17,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 675 transitions, 9397 flow [2024-06-27 19:34:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:34:17,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:34:17,960 INFO L175 Difference]: Start difference. First operand has 494 places, 640 transitions, 7619 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:34:17,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 675 transitions, 9397 flow [2024-06-27 19:34:22,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 675 transitions, 9062 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 19:34:22,366 INFO L231 Difference]: Finished difference. Result has 494 places, 641 transitions, 7660 flow [2024-06-27 19:34:22,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7286, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7660, PETRI_PLACES=494, PETRI_TRANSITIONS=641} [2024-06-27 19:34:22,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-27 19:34:22,367 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 641 transitions, 7660 flow [2024-06-27 19:34:22,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:22,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:22,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:22,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-27 19:34:22,367 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:22,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:22,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1413105570, now seen corresponding path program 10 times [2024-06-27 19:34:22,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:22,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773991189] [2024-06-27 19:34:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:22,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:22,444 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 19:34:22,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:22,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773991189] [2024-06-27 19:34:22,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773991189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:22,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:22,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234518821] [2024-06-27 19:34:22,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:22,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:22,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:22,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:22,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:22,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:22,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 641 transitions, 7660 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:22,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:22,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:22,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:24,222 INFO L124 PetriNetUnfolderBase]: 3856/6651 cut-off events. [2024-06-27 19:34:24,222 INFO L125 PetriNetUnfolderBase]: For 495439/495442 co-relation queries the response was YES. [2024-06-27 19:34:24,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41288 conditions, 6651 events. 3856/6651 cut-off events. For 495439/495442 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 47885 event pairs, 635 based on Foata normal form. 8/6652 useless extension candidates. Maximal degree in co-relation 41074. Up to 4155 conditions per place. [2024-06-27 19:34:24,393 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 517 selfloop transitions, 149 changer transitions 0/674 dead transitions. [2024-06-27 19:34:24,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 674 transitions, 9434 flow [2024-06-27 19:34:24,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:34:24,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:34:24,394 INFO L175 Difference]: Start difference. First operand has 494 places, 641 transitions, 7660 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:34:24,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 674 transitions, 9434 flow [2024-06-27 19:34:28,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 674 transitions, 9015 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:28,404 INFO L231 Difference]: Finished difference. Result has 496 places, 642 transitions, 7585 flow [2024-06-27 19:34:28,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7244, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7585, PETRI_PLACES=496, PETRI_TRANSITIONS=642} [2024-06-27 19:34:28,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-27 19:34:28,404 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 642 transitions, 7585 flow [2024-06-27 19:34:28,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:28,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:28,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:28,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-27 19:34:28,405 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:28,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:28,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1413372480, now seen corresponding path program 11 times [2024-06-27 19:34:28,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:28,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691001956] [2024-06-27 19:34:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:28,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:28,482 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 19:34:28,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:28,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691001956] [2024-06-27 19:34:28,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691001956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:28,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:28,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885125237] [2024-06-27 19:34:28,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:28,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:28,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:28,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:28,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:28,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:28,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 642 transitions, 7585 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:28,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:28,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:28,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:30,185 INFO L124 PetriNetUnfolderBase]: 3843/6632 cut-off events. [2024-06-27 19:34:30,186 INFO L125 PetriNetUnfolderBase]: For 448928/448931 co-relation queries the response was YES. [2024-06-27 19:34:30,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39713 conditions, 6632 events. 3843/6632 cut-off events. For 448928/448931 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 47800 event pairs, 635 based on Foata normal form. 8/6633 useless extension candidates. Maximal degree in co-relation 39499. Up to 4149 conditions per place. [2024-06-27 19:34:30,290 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 512 selfloop transitions, 151 changer transitions 0/671 dead transitions. [2024-06-27 19:34:30,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 671 transitions, 9031 flow [2024-06-27 19:34:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:34:30,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:34:30,291 INFO L175 Difference]: Start difference. First operand has 496 places, 642 transitions, 7585 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:34:30,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 671 transitions, 9031 flow [2024-06-27 19:34:33,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 671 transitions, 8481 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 19:34:33,752 INFO L231 Difference]: Finished difference. Result has 496 places, 642 transitions, 7341 flow [2024-06-27 19:34:33,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7035, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7341, PETRI_PLACES=496, PETRI_TRANSITIONS=642} [2024-06-27 19:34:33,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-27 19:34:33,753 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 642 transitions, 7341 flow [2024-06-27 19:34:33,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:33,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:33,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:33,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-27 19:34:33,753 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:33,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash 884222462, now seen corresponding path program 1 times [2024-06-27 19:34:33,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:33,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541121945] [2024-06-27 19:34:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:33,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:33,846 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 19:34:33,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:33,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541121945] [2024-06-27 19:34:33,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541121945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:33,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:33,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:34:33,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142396945] [2024-06-27 19:34:33,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:33,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:34:33,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:34:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:34:33,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:33,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 642 transitions, 7341 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:33,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:33,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:33,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:35,771 INFO L124 PetriNetUnfolderBase]: 4183/7201 cut-off events. [2024-06-27 19:34:35,771 INFO L125 PetriNetUnfolderBase]: For 1014289/1014289 co-relation queries the response was YES. [2024-06-27 19:34:35,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49509 conditions, 7201 events. 4183/7201 cut-off events. For 1014289/1014289 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 52032 event pairs, 770 based on Foata normal form. 6/7201 useless extension candidates. Maximal degree in co-relation 49296. Up to 5339 conditions per place. [2024-06-27 19:34:35,884 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 623 selfloop transitions, 73 changer transitions 0/704 dead transitions. [2024-06-27 19:34:35,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 704 transitions, 9615 flow [2024-06-27 19:34:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:34:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:34:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-06-27 19:34:35,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:34:35,885 INFO L175 Difference]: Start difference. First operand has 496 places, 642 transitions, 7341 flow. Second operand 10 states and 265 transitions. [2024-06-27 19:34:35,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 704 transitions, 9615 flow [2024-06-27 19:34:44,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 704 transitions, 9278 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:44,511 INFO L231 Difference]: Finished difference. Result has 499 places, 645 transitions, 7278 flow [2024-06-27 19:34:44,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7278, PETRI_PLACES=499, PETRI_TRANSITIONS=645} [2024-06-27 19:34:44,512 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-27 19:34:44,512 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 645 transitions, 7278 flow [2024-06-27 19:34:44,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:44,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:44,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:44,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-27 19:34:44,513 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:44,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:44,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1581308844, now seen corresponding path program 2 times [2024-06-27 19:34:44,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:44,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099139361] [2024-06-27 19:34:44,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:44,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:44,620 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 19:34:44,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:44,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099139361] [2024-06-27 19:34:44,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099139361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:44,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:44,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:34:44,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821057783] [2024-06-27 19:34:44,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:44,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:34:44,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:44,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:34:44,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:34:44,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:44,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 645 transitions, 7278 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:44,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:44,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:44,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:46,643 INFO L124 PetriNetUnfolderBase]: 4211/7251 cut-off events. [2024-06-27 19:34:46,643 INFO L125 PetriNetUnfolderBase]: For 950177/950177 co-relation queries the response was YES. [2024-06-27 19:34:46,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48916 conditions, 7251 events. 4211/7251 cut-off events. For 950177/950177 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 52421 event pairs, 794 based on Foata normal form. 6/7253 useless extension candidates. Maximal degree in co-relation 48702. Up to 6208 conditions per place. [2024-06-27 19:34:46,848 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 625 selfloop transitions, 62 changer transitions 0/695 dead transitions. [2024-06-27 19:34:46,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 695 transitions, 8890 flow [2024-06-27 19:34:46,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:34:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:34:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-27 19:34:46,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-27 19:34:46,855 INFO L175 Difference]: Start difference. First operand has 499 places, 645 transitions, 7278 flow. Second operand 10 states and 252 transitions. [2024-06-27 19:34:46,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 695 transitions, 8890 flow [2024-06-27 19:34:53,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 695 transitions, 8751 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:53,984 INFO L231 Difference]: Finished difference. Result has 504 places, 648 transitions, 7333 flow [2024-06-27 19:34:53,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7151, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7333, PETRI_PLACES=504, PETRI_TRANSITIONS=648} [2024-06-27 19:34:53,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-27 19:34:53,984 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 648 transitions, 7333 flow [2024-06-27 19:34:53,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:53,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:53,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:53,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-27 19:34:53,985 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:53,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:53,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1340247048, now seen corresponding path program 1 times [2024-06-27 19:34:53,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:53,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937549707] [2024-06-27 19:34:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:53,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:54,067 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 19:34:54,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937549707] [2024-06-27 19:34:54,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937549707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:54,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:54,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:54,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295750484] [2024-06-27 19:34:54,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:54,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:54,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:54,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 648 transitions, 7333 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:34:54,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:54,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:54,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:56,136 INFO L124 PetriNetUnfolderBase]: 4343/7461 cut-off events. [2024-06-27 19:34:56,136 INFO L125 PetriNetUnfolderBase]: For 1101057/1101057 co-relation queries the response was YES. [2024-06-27 19:34:56,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52378 conditions, 7461 events. 4343/7461 cut-off events. For 1101057/1101057 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 54151 event pairs, 670 based on Foata normal form. 6/7459 useless extension candidates. Maximal degree in co-relation 52162. Up to 5939 conditions per place. [2024-06-27 19:34:56,249 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 561 selfloop transitions, 118 changer transitions 0/687 dead transitions. [2024-06-27 19:34:56,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 687 transitions, 9446 flow [2024-06-27 19:34:56,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:56,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:34:56,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-27 19:34:56,250 INFO L175 Difference]: Start difference. First operand has 504 places, 648 transitions, 7333 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:34:56,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 687 transitions, 9446 flow [2024-06-27 19:35:04,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 687 transitions, 9294 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:04,258 INFO L231 Difference]: Finished difference. Result has 506 places, 652 transitions, 7582 flow [2024-06-27 19:35:04,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7582, PETRI_PLACES=506, PETRI_TRANSITIONS=652} [2024-06-27 19:35:04,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-27 19:35:04,259 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 652 transitions, 7582 flow [2024-06-27 19:35:04,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:35:04,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:04,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:04,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-27 19:35:04,259 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:04,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:04,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1906834664, now seen corresponding path program 3 times [2024-06-27 19:35:04,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:04,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163459174] [2024-06-27 19:35:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:04,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:04,351 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 19:35:04,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:04,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163459174] [2024-06-27 19:35:04,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163459174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:04,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:04,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:35:04,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261290059] [2024-06-27 19:35:04,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:04,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:35:04,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:35:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:35:04,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:04,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 652 transitions, 7582 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:04,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:04,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:04,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:06,422 INFO L124 PetriNetUnfolderBase]: 4412/7586 cut-off events. [2024-06-27 19:35:06,422 INFO L125 PetriNetUnfolderBase]: For 1172612/1172612 co-relation queries the response was YES. [2024-06-27 19:35:06,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54525 conditions, 7586 events. 4412/7586 cut-off events. For 1172612/1172612 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 55208 event pairs, 844 based on Foata normal form. 6/7588 useless extension candidates. Maximal degree in co-relation 54307. Up to 6450 conditions per place. [2024-06-27 19:35:06,536 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 628 selfloop transitions, 68 changer transitions 0/704 dead transitions. [2024-06-27 19:35:06,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 704 transitions, 9507 flow [2024-06-27 19:35:06,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:35:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:35:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-27 19:35:06,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5920177383592018 [2024-06-27 19:35:06,537 INFO L175 Difference]: Start difference. First operand has 506 places, 652 transitions, 7582 flow. Second operand 11 states and 267 transitions. [2024-06-27 19:35:06,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 704 transitions, 9507 flow [2024-06-27 19:35:15,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 704 transitions, 9395 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 19:35:15,875 INFO L231 Difference]: Finished difference. Result has 515 places, 658 transitions, 7731 flow [2024-06-27 19:35:15,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7470, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7731, PETRI_PLACES=515, PETRI_TRANSITIONS=658} [2024-06-27 19:35:15,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-27 19:35:15,875 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 658 transitions, 7731 flow [2024-06-27 19:35:15,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:15,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:15,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:15,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-27 19:35:15,876 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:15,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:15,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1758440550, now seen corresponding path program 2 times [2024-06-27 19:35:15,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:15,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947579626] [2024-06-27 19:35:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:15,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:15,950 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 19:35:15,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:15,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947579626] [2024-06-27 19:35:15,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947579626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:15,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:15,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:15,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721004973] [2024-06-27 19:35:15,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:15,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:15,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:15,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:15,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 658 transitions, 7731 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:35:15,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:15,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:15,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:17,872 INFO L124 PetriNetUnfolderBase]: 4498/7710 cut-off events. [2024-06-27 19:35:17,872 INFO L125 PetriNetUnfolderBase]: For 1294844/1294844 co-relation queries the response was YES. [2024-06-27 19:35:18,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57494 conditions, 7710 events. 4498/7710 cut-off events. For 1294844/1294844 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 56042 event pairs, 721 based on Foata normal form. 6/7708 useless extension candidates. Maximal degree in co-relation 57273. Up to 6078 conditions per place. [2024-06-27 19:35:18,120 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 569 selfloop transitions, 118 changer transitions 0/695 dead transitions. [2024-06-27 19:35:18,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 695 transitions, 10124 flow [2024-06-27 19:35:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:35:18,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:35:18,121 INFO L175 Difference]: Start difference. First operand has 515 places, 658 transitions, 7731 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:35:18,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 695 transitions, 10124 flow [2024-06-27 19:35:26,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 695 transitions, 9964 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:26,919 INFO L231 Difference]: Finished difference. Result has 517 places, 661 transitions, 7908 flow [2024-06-27 19:35:26,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7571, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7908, PETRI_PLACES=517, PETRI_TRANSITIONS=661} [2024-06-27 19:35:26,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 475 predicate places. [2024-06-27 19:35:26,919 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 661 transitions, 7908 flow [2024-06-27 19:35:26,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:35:26,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:26,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:26,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-27 19:35:26,919 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:26,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:26,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1283441178, now seen corresponding path program 3 times [2024-06-27 19:35:26,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:26,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929682129] [2024-06-27 19:35:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:26,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:26,995 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 19:35:26,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:26,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929682129] [2024-06-27 19:35:26,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929682129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:26,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:26,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:26,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151649578] [2024-06-27 19:35:26,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:26,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:26,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:26,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:26,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:27,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:27,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 661 transitions, 7908 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:35:27,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:27,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:27,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:28,986 INFO L124 PetriNetUnfolderBase]: 4485/7697 cut-off events. [2024-06-27 19:35:28,986 INFO L125 PetriNetUnfolderBase]: For 1262508/1262508 co-relation queries the response was YES. [2024-06-27 19:35:29,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56780 conditions, 7697 events. 4485/7697 cut-off events. For 1262508/1262508 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 56064 event pairs, 723 based on Foata normal form. 6/7695 useless extension candidates. Maximal degree in co-relation 56559. Up to 6072 conditions per place. [2024-06-27 19:35:29,107 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 564 selfloop transitions, 120 changer transitions 0/692 dead transitions. [2024-06-27 19:35:29,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 692 transitions, 9922 flow [2024-06-27 19:35:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:35:29,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:35:29,108 INFO L175 Difference]: Start difference. First operand has 517 places, 661 transitions, 7908 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:35:29,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 692 transitions, 9922 flow [2024-06-27 19:35:39,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 692 transitions, 9721 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 19:35:39,128 INFO L231 Difference]: Finished difference. Result has 522 places, 661 transitions, 7951 flow [2024-06-27 19:35:39,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7707, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7951, PETRI_PLACES=522, PETRI_TRANSITIONS=661} [2024-06-27 19:35:39,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-27 19:35:39,128 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 661 transitions, 7951 flow [2024-06-27 19:35:39,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:35:39,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:39,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:39,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-27 19:35:39,129 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:39,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:39,129 INFO L85 PathProgramCache]: Analyzing trace with hash 941932614, now seen corresponding path program 4 times [2024-06-27 19:35:39,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:39,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972923728] [2024-06-27 19:35:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:39,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:39,212 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 19:35:39,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:39,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972923728] [2024-06-27 19:35:39,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972923728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:39,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:39,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:35:39,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44492642] [2024-06-27 19:35:39,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:39,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:35:39,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:35:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:35:39,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:39,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 661 transitions, 7951 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:39,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:39,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:39,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:41,344 INFO L124 PetriNetUnfolderBase]: 4652/7996 cut-off events. [2024-06-27 19:35:41,345 INFO L125 PetriNetUnfolderBase]: For 1550158/1550158 co-relation queries the response was YES. [2024-06-27 19:35:41,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62204 conditions, 7996 events. 4652/7996 cut-off events. For 1550158/1550158 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 58575 event pairs, 1063 based on Foata normal form. 6/7992 useless extension candidates. Maximal degree in co-relation 61982. Up to 6301 conditions per place. [2024-06-27 19:35:41,475 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 636 selfloop transitions, 70 changer transitions 0/714 dead transitions. [2024-06-27 19:35:41,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 714 transitions, 10165 flow [2024-06-27 19:35:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 19:35:41,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6449864498644986 [2024-06-27 19:35:41,476 INFO L175 Difference]: Start difference. First operand has 522 places, 661 transitions, 7951 flow. Second operand 9 states and 238 transitions. [2024-06-27 19:35:41,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 714 transitions, 10165 flow [2024-06-27 19:35:51,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 714 transitions, 9926 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:51,551 INFO L231 Difference]: Finished difference. Result has 525 places, 663 transitions, 7916 flow [2024-06-27 19:35:51,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7712, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7916, PETRI_PLACES=525, PETRI_TRANSITIONS=663} [2024-06-27 19:35:51,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-27 19:35:51,551 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 663 transitions, 7916 flow [2024-06-27 19:35:51,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:51,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:51,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:51,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-27 19:35:51,552 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:51,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:51,552 INFO L85 PathProgramCache]: Analyzing trace with hash 793658470, now seen corresponding path program 4 times [2024-06-27 19:35:51,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:51,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392915650] [2024-06-27 19:35:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:51,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:51,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:51,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392915650] [2024-06-27 19:35:51,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392915650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:51,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:51,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:51,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707943805] [2024-06-27 19:35:51,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:51,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:51,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:51,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:51,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:51,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 663 transitions, 7916 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:35:51,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:51,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:51,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:53,789 INFO L124 PetriNetUnfolderBase]: 4639/7928 cut-off events. [2024-06-27 19:35:53,789 INFO L125 PetriNetUnfolderBase]: For 1518983/1518983 co-relation queries the response was YES. [2024-06-27 19:35:53,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61120 conditions, 7928 events. 4639/7928 cut-off events. For 1518983/1518983 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 57845 event pairs, 1151 based on Foata normal form. 6/7915 useless extension candidates. Maximal degree in co-relation 60897. Up to 6810 conditions per place. [2024-06-27 19:35:53,913 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 586 selfloop transitions, 95 changer transitions 0/689 dead transitions. [2024-06-27 19:35:53,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 689 transitions, 9642 flow [2024-06-27 19:35:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:35:53,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:35:53,914 INFO L175 Difference]: Start difference. First operand has 525 places, 663 transitions, 7916 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:35:53,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 689 transitions, 9642 flow [2024-06-27 19:36:03,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 689 transitions, 9456 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:03,861 INFO L231 Difference]: Finished difference. Result has 526 places, 663 transitions, 7924 flow [2024-06-27 19:36:03,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7730, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7924, PETRI_PLACES=526, PETRI_TRANSITIONS=663} [2024-06-27 19:36:03,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-27 19:36:03,861 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 663 transitions, 7924 flow [2024-06-27 19:36:03,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:36:03,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:03,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:03,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-27 19:36:03,862 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:03,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:03,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1285462450, now seen corresponding path program 5 times [2024-06-27 19:36:03,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:03,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516983603] [2024-06-27 19:36:03,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:03,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:03,945 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 19:36:03,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:03,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516983603] [2024-06-27 19:36:03,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516983603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:03,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:03,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:36:03,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479832689] [2024-06-27 19:36:03,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:03,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:36:03,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:03,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:36:03,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:36:03,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:03,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 663 transitions, 7924 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:03,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:03,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:03,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:06,085 INFO L124 PetriNetUnfolderBase]: 4667/8025 cut-off events. [2024-06-27 19:36:06,085 INFO L125 PetriNetUnfolderBase]: For 1557105/1557105 co-relation queries the response was YES. [2024-06-27 19:36:06,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61510 conditions, 8025 events. 4667/8025 cut-off events. For 1557105/1557105 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 58892 event pairs, 1157 based on Foata normal form. 8/8027 useless extension candidates. Maximal degree in co-relation 61286. Up to 6745 conditions per place. [2024-06-27 19:36:06,329 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 633 selfloop transitions, 68 changer transitions 0/709 dead transitions. [2024-06-27 19:36:06,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 709 transitions, 9796 flow [2024-06-27 19:36:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 19:36:06,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314363143631436 [2024-06-27 19:36:06,330 INFO L175 Difference]: Start difference. First operand has 526 places, 663 transitions, 7924 flow. Second operand 9 states and 233 transitions. [2024-06-27 19:36:06,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 709 transitions, 9796 flow [2024-06-27 19:36:16,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 709 transitions, 9623 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:16,698 INFO L231 Difference]: Finished difference. Result has 529 places, 664 transitions, 7919 flow [2024-06-27 19:36:16,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7751, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7919, PETRI_PLACES=529, PETRI_TRANSITIONS=664} [2024-06-27 19:36:16,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 487 predicate places. [2024-06-27 19:36:16,698 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 664 transitions, 7919 flow [2024-06-27 19:36:16,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:16,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:16,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:16,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-27 19:36:16,699 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:16,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:16,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2127897794, now seen corresponding path program 6 times [2024-06-27 19:36:16,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:16,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780720106] [2024-06-27 19:36:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:16,802 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 19:36:16,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:16,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780720106] [2024-06-27 19:36:16,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780720106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:16,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:16,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:36:16,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180111509] [2024-06-27 19:36:16,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:16,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:36:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:36:16,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:36:16,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:16,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 664 transitions, 7919 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:16,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:16,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:16,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:18,991 INFO L124 PetriNetUnfolderBase]: 4654/7983 cut-off events. [2024-06-27 19:36:18,991 INFO L125 PetriNetUnfolderBase]: For 1505201/1505201 co-relation queries the response was YES. [2024-06-27 19:36:19,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60616 conditions, 7983 events. 4654/7983 cut-off events. For 1505201/1505201 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 58479 event pairs, 1147 based on Foata normal form. 6/7974 useless extension candidates. Maximal degree in co-relation 60391. Up to 7072 conditions per place. [2024-06-27 19:36:19,118 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 641 selfloop transitions, 54 changer transitions 0/703 dead transitions. [2024-06-27 19:36:19,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 703 transitions, 9441 flow [2024-06-27 19:36:19,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 19:36:19,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:36:19,119 INFO L175 Difference]: Start difference. First operand has 529 places, 664 transitions, 7919 flow. Second operand 9 states and 225 transitions. [2024-06-27 19:36:19,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 703 transitions, 9441 flow [2024-06-27 19:36:30,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 703 transitions, 9264 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:30,131 INFO L231 Difference]: Finished difference. Result has 531 places, 664 transitions, 7854 flow [2024-06-27 19:36:30,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7742, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7854, PETRI_PLACES=531, PETRI_TRANSITIONS=664} [2024-06-27 19:36:30,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-27 19:36:30,132 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 664 transitions, 7854 flow [2024-06-27 19:36:30,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:30,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:30,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:30,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-27 19:36:30,132 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:30,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1977343814, now seen corresponding path program 7 times [2024-06-27 19:36:30,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:30,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683466365] [2024-06-27 19:36:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:30,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:30,221 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 19:36:30,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:30,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683466365] [2024-06-27 19:36:30,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683466365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:30,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:30,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:36:30,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497110281] [2024-06-27 19:36:30,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:30,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:36:30,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:36:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:36:30,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:30,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 664 transitions, 7854 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:30,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:30,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:30,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:32,361 INFO L124 PetriNetUnfolderBase]: 4682/8052 cut-off events. [2024-06-27 19:36:32,361 INFO L125 PetriNetUnfolderBase]: For 1543594/1543594 co-relation queries the response was YES. [2024-06-27 19:36:32,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60857 conditions, 8052 events. 4682/8052 cut-off events. For 1543594/1543594 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 59107 event pairs, 1182 based on Foata normal form. 8/8056 useless extension candidates. Maximal degree in co-relation 60631. Up to 7151 conditions per place. [2024-06-27 19:36:32,492 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 625 selfloop transitions, 67 changer transitions 0/700 dead transitions. [2024-06-27 19:36:32,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 700 transitions, 9376 flow [2024-06-27 19:36:32,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:32,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-27 19:36:32,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070460704607046 [2024-06-27 19:36:32,493 INFO L175 Difference]: Start difference. First operand has 531 places, 664 transitions, 7854 flow. Second operand 9 states and 224 transitions. [2024-06-27 19:36:32,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 700 transitions, 9376 flow [2024-06-27 19:36:43,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 700 transitions, 9265 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:36:43,437 INFO L231 Difference]: Finished difference. Result has 532 places, 665 transitions, 7910 flow [2024-06-27 19:36:43,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7910, PETRI_PLACES=532, PETRI_TRANSITIONS=665} [2024-06-27 19:36:43,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-27 19:36:43,437 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 665 transitions, 7910 flow [2024-06-27 19:36:43,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:43,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:43,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:43,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-27 19:36:43,438 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:43,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:43,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1862200328, now seen corresponding path program 5 times [2024-06-27 19:36:43,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:43,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216157749] [2024-06-27 19:36:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:43,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:43,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:43,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216157749] [2024-06-27 19:36:43,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216157749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:43,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:43,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:43,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952285029] [2024-06-27 19:36:43,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:43,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:43,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:43,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:43,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:43,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 665 transitions, 7910 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:36:43,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:43,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:43,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:45,641 INFO L124 PetriNetUnfolderBase]: 4756/8148 cut-off events. [2024-06-27 19:36:45,641 INFO L125 PetriNetUnfolderBase]: For 1627959/1627959 co-relation queries the response was YES. [2024-06-27 19:36:45,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63098 conditions, 8148 events. 4756/8148 cut-off events. For 1627959/1627959 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59907 event pairs, 1203 based on Foata normal form. 6/8144 useless extension candidates. Maximal degree in co-relation 62871. Up to 7117 conditions per place. [2024-06-27 19:36:45,769 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 597 selfloop transitions, 86 changer transitions 0/691 dead transitions. [2024-06-27 19:36:45,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 691 transitions, 9741 flow [2024-06-27 19:36:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:36:45,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:36:45,770 INFO L175 Difference]: Start difference. First operand has 532 places, 665 transitions, 7910 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:36:45,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 691 transitions, 9741 flow [2024-06-27 19:36:57,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 691 transitions, 9596 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:57,029 INFO L231 Difference]: Finished difference. Result has 533 places, 669 transitions, 8064 flow [2024-06-27 19:36:57,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7765, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8064, PETRI_PLACES=533, PETRI_TRANSITIONS=669} [2024-06-27 19:36:57,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-27 19:36:57,030 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 669 transitions, 8064 flow [2024-06-27 19:36:57,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:36:57,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:57,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:57,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-27 19:36:57,031 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:57,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:57,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1548031396, now seen corresponding path program 6 times [2024-06-27 19:36:57,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:57,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883374514] [2024-06-27 19:36:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:57,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:57,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:57,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883374514] [2024-06-27 19:36:57,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883374514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:57,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:57,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:57,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27636486] [2024-06-27 19:36:57,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:57,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:57,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:57,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:57,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:57,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 669 transitions, 8064 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:36:57,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:57,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:57,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:59,310 INFO L124 PetriNetUnfolderBase]: 4738/8130 cut-off events. [2024-06-27 19:36:59,311 INFO L125 PetriNetUnfolderBase]: For 1592647/1592647 co-relation queries the response was YES. [2024-06-27 19:36:59,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62039 conditions, 8130 events. 4738/8130 cut-off events. For 1592647/1592647 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59836 event pairs, 1197 based on Foata normal form. 8/8130 useless extension candidates. Maximal degree in co-relation 61810. Up to 7153 conditions per place. [2024-06-27 19:36:59,438 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 593 selfloop transitions, 86 changer transitions 0/687 dead transitions. [2024-06-27 19:36:59,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 687 transitions, 9488 flow [2024-06-27 19:36:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:36:59,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:36:59,439 INFO L175 Difference]: Start difference. First operand has 533 places, 669 transitions, 8064 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:36:59,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 687 transitions, 9488 flow [2024-06-27 19:37:11,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 687 transitions, 9361 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:37:11,820 INFO L231 Difference]: Finished difference. Result has 537 places, 669 transitions, 8118 flow [2024-06-27 19:37:11,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7937, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8118, PETRI_PLACES=537, PETRI_TRANSITIONS=669} [2024-06-27 19:37:11,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 495 predicate places. [2024-06-27 19:37:11,820 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 669 transitions, 8118 flow [2024-06-27 19:37:11,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:37:11,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:11,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:11,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-27 19:37:11,820 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:11,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:11,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1547704780, now seen corresponding path program 8 times [2024-06-27 19:37:11,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:11,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910175764] [2024-06-27 19:37:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:11,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:11,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:11,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910175764] [2024-06-27 19:37:11,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910175764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:11,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:11,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:11,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645583644] [2024-06-27 19:37:11,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:11,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:11,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:11,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:11,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:11,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:11,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 669 transitions, 8118 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:11,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:11,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:11,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:14,178 INFO L124 PetriNetUnfolderBase]: 4804/8248 cut-off events. [2024-06-27 19:37:14,179 INFO L125 PetriNetUnfolderBase]: For 1672556/1672556 co-relation queries the response was YES. [2024-06-27 19:37:14,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64130 conditions, 8248 events. 4804/8248 cut-off events. For 1672556/1672556 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 60825 event pairs, 1192 based on Foata normal form. 6/8248 useless extension candidates. Maximal degree in co-relation 63899. Up to 7317 conditions per place. [2024-06-27 19:37:14,310 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 645 selfloop transitions, 55 changer transitions 0/708 dead transitions. [2024-06-27 19:37:14,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 708 transitions, 9982 flow [2024-06-27 19:37:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-27 19:37:14,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878048780487805 [2024-06-27 19:37:14,310 INFO L175 Difference]: Start difference. First operand has 537 places, 669 transitions, 8118 flow. Second operand 10 states and 241 transitions. [2024-06-27 19:37:14,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 708 transitions, 9982 flow [2024-06-27 19:37:26,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 708 transitions, 9811 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:37:26,634 INFO L231 Difference]: Finished difference. Result has 543 places, 671 transitions, 8127 flow [2024-06-27 19:37:26,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7947, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8127, PETRI_PLACES=543, PETRI_TRANSITIONS=671} [2024-06-27 19:37:26,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 501 predicate places. [2024-06-27 19:37:26,635 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 671 transitions, 8127 flow [2024-06-27 19:37:26,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:26,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:26,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:26,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-27 19:37:26,635 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:26,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:26,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2120484764, now seen corresponding path program 9 times [2024-06-27 19:37:26,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:26,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200976813] [2024-06-27 19:37:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:26,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:26,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:26,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200976813] [2024-06-27 19:37:26,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200976813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:26,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:26,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:26,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118786944] [2024-06-27 19:37:26,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:26,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:26,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:26,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:26,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:26,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 671 transitions, 8127 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:26,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:26,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:26,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:29,076 INFO L124 PetriNetUnfolderBase]: 4786/8220 cut-off events. [2024-06-27 19:37:29,076 INFO L125 PetriNetUnfolderBase]: For 1636534/1636534 co-relation queries the response was YES. [2024-06-27 19:37:29,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62935 conditions, 8220 events. 4786/8220 cut-off events. For 1636534/1636534 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 60506 event pairs, 1200 based on Foata normal form. 8/8224 useless extension candidates. Maximal degree in co-relation 62702. Up to 7339 conditions per place. [2024-06-27 19:37:29,210 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 643 selfloop transitions, 52 changer transitions 0/703 dead transitions. [2024-06-27 19:37:29,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 703 transitions, 9621 flow [2024-06-27 19:37:29,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-27 19:37:29,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-27 19:37:29,211 INFO L175 Difference]: Start difference. First operand has 543 places, 671 transitions, 8127 flow. Second operand 9 states and 219 transitions. [2024-06-27 19:37:29,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 703 transitions, 9621 flow [2024-06-27 19:37:42,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 703 transitions, 9479 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 19:37:42,996 INFO L231 Difference]: Finished difference. Result has 545 places, 671 transitions, 8094 flow [2024-06-27 19:37:42,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7985, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8094, PETRI_PLACES=545, PETRI_TRANSITIONS=671} [2024-06-27 19:37:42,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 503 predicate places. [2024-06-27 19:37:42,997 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 671 transitions, 8094 flow [2024-06-27 19:37:42,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:42,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:42,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:42,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-27 19:37:42,997 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:42,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash 790358838, now seen corresponding path program 7 times [2024-06-27 19:37:42,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:42,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526427843] [2024-06-27 19:37:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:42,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:43,078 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 19:37:43,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:43,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526427843] [2024-06-27 19:37:43,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526427843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:43,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:43,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:43,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067224428] [2024-06-27 19:37:43,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:43,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:43,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:43,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:43,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:43,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 671 transitions, 8094 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:37:43,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:43,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:43,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:45,355 INFO L124 PetriNetUnfolderBase]: 4834/8294 cut-off events. [2024-06-27 19:37:45,355 INFO L125 PetriNetUnfolderBase]: For 1702185/1702185 co-relation queries the response was YES. [2024-06-27 19:37:45,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64060 conditions, 8294 events. 4834/8294 cut-off events. For 1702185/1702185 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 61236 event pairs, 1104 based on Foata normal form. 8/8294 useless extension candidates. Maximal degree in co-relation 63826. Up to 7123 conditions per place. [2024-06-27 19:37:45,492 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 576 selfloop transitions, 113 changer transitions 0/697 dead transitions. [2024-06-27 19:37:45,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 697 transitions, 9928 flow [2024-06-27 19:37:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:37:45,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:37:45,493 INFO L175 Difference]: Start difference. First operand has 545 places, 671 transitions, 8094 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:37:45,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 697 transitions, 9928 flow [2024-06-27 19:37:58,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 697 transitions, 9827 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:37:58,066 INFO L231 Difference]: Finished difference. Result has 547 places, 673 transitions, 8328 flow [2024-06-27 19:37:58,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7993, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8328, PETRI_PLACES=547, PETRI_TRANSITIONS=673} [2024-06-27 19:37:58,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 505 predicate places. [2024-06-27 19:37:58,067 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 673 transitions, 8328 flow [2024-06-27 19:37:58,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:37:58,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:58,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:58,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-27 19:37:58,067 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:58,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:58,067 INFO L85 PathProgramCache]: Analyzing trace with hash 207011132, now seen corresponding path program 8 times [2024-06-27 19:37:58,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:58,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500270052] [2024-06-27 19:37:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:58,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:58,149 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 19:37:58,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:58,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500270052] [2024-06-27 19:37:58,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500270052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:58,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:58,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:58,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875051509] [2024-06-27 19:37:58,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:58,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:58,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:58,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:58,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:58,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:58,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 673 transitions, 8328 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:37:58,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:58,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:58,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:00,393 INFO L124 PetriNetUnfolderBase]: 4862/8336 cut-off events. [2024-06-27 19:38:00,394 INFO L125 PetriNetUnfolderBase]: For 1728552/1728552 co-relation queries the response was YES. [2024-06-27 19:38:00,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65095 conditions, 8336 events. 4862/8336 cut-off events. For 1728552/1728552 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 61519 event pairs, 1236 based on Foata normal form. 8/8336 useless extension candidates. Maximal degree in co-relation 64859. Up to 7349 conditions per place. [2024-06-27 19:38:00,530 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 587 selfloop transitions, 98 changer transitions 0/693 dead transitions. [2024-06-27 19:38:00,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 693 transitions, 9806 flow [2024-06-27 19:38:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:38:00,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:38:00,532 INFO L175 Difference]: Start difference. First operand has 547 places, 673 transitions, 8328 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:38:00,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 693 transitions, 9806 flow [2024-06-27 19:38:14,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 693 transitions, 9525 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:38:14,110 INFO L231 Difference]: Finished difference. Result has 549 places, 674 transitions, 8294 flow [2024-06-27 19:38:14,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8051, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8294, PETRI_PLACES=549, PETRI_TRANSITIONS=674} [2024-06-27 19:38:14,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 507 predicate places. [2024-06-27 19:38:14,110 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 674 transitions, 8294 flow [2024-06-27 19:38:14,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:38:14,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:14,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:14,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-27 19:38:14,111 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:14,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:14,111 INFO L85 PathProgramCache]: Analyzing trace with hash -20890018, now seen corresponding path program 9 times [2024-06-27 19:38:14,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:14,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079740043] [2024-06-27 19:38:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:14,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:14,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:14,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079740043] [2024-06-27 19:38:14,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079740043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:14,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:14,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:14,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300156173] [2024-06-27 19:38:14,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:14,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:14,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:14,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:14,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:14,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:14,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 674 transitions, 8294 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:38:14,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:14,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:14,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:16,552 INFO L124 PetriNetUnfolderBase]: 4844/8304 cut-off events. [2024-06-27 19:38:16,552 INFO L125 PetriNetUnfolderBase]: For 1665702/1665702 co-relation queries the response was YES. [2024-06-27 19:38:16,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63591 conditions, 8304 events. 4844/8304 cut-off events. For 1665702/1665702 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 61265 event pairs, 1225 based on Foata normal form. 8/8304 useless extension candidates. Maximal degree in co-relation 63354. Up to 7279 conditions per place. [2024-06-27 19:38:16,691 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 589 selfloop transitions, 94 changer transitions 0/691 dead transitions. [2024-06-27 19:38:16,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 691 transitions, 9724 flow [2024-06-27 19:38:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:38:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:38:16,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:38:16,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:38:16,692 INFO L175 Difference]: Start difference. First operand has 549 places, 674 transitions, 8294 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:38:16,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 691 transitions, 9724 flow [2024-06-27 19:38:30,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 691 transitions, 9503 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:38:30,848 INFO L231 Difference]: Finished difference. Result has 549 places, 674 transitions, 8277 flow [2024-06-27 19:38:30,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8073, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8277, PETRI_PLACES=549, PETRI_TRANSITIONS=674} [2024-06-27 19:38:30,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 507 predicate places. [2024-06-27 19:38:30,848 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 674 transitions, 8277 flow [2024-06-27 19:38:30,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:38:30,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:30,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:30,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-27 19:38:30,849 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:30,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:30,849 INFO L85 PathProgramCache]: Analyzing trace with hash -21216448, now seen corresponding path program 10 times [2024-06-27 19:38:30,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:30,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229897611] [2024-06-27 19:38:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:30,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:30,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:30,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229897611] [2024-06-27 19:38:30,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229897611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:30,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:30,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:30,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039761311] [2024-06-27 19:38:30,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:30,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:30,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:30,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:30,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:30,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:30,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 674 transitions, 8277 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:38:30,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:30,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:30,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:33,232 INFO L124 PetriNetUnfolderBase]: 4831/8250 cut-off events. [2024-06-27 19:38:33,233 INFO L125 PetriNetUnfolderBase]: For 1603930/1603930 co-relation queries the response was YES. [2024-06-27 19:38:33,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62509 conditions, 8250 events. 4831/8250 cut-off events. For 1603930/1603930 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 60688 event pairs, 1165 based on Foata normal form. 6/8235 useless extension candidates. Maximal degree in co-relation 62271. Up to 7032 conditions per place. [2024-06-27 19:38:33,370 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 588 selfloop transitions, 101 changer transitions 0/697 dead transitions. [2024-06-27 19:38:33,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 697 transitions, 9745 flow [2024-06-27 19:38:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:38:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:38:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:38:33,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:38:33,370 INFO L175 Difference]: Start difference. First operand has 549 places, 674 transitions, 8277 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:38:33,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 697 transitions, 9745 flow [2024-06-27 19:38:47,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 697 transitions, 9548 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:47,021 INFO L231 Difference]: Finished difference. Result has 550 places, 674 transitions, 8290 flow [2024-06-27 19:38:47,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8080, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8290, PETRI_PLACES=550, PETRI_TRANSITIONS=674} [2024-06-27 19:38:47,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-27 19:38:47,022 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 674 transitions, 8290 flow [2024-06-27 19:38:47,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:38:47,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:47,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:47,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-27 19:38:47,022 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:47,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:47,022 INFO L85 PathProgramCache]: Analyzing trace with hash -21216634, now seen corresponding path program 10 times [2024-06-27 19:38:47,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:47,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059951872] [2024-06-27 19:38:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:47,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:47,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:47,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059951872] [2024-06-27 19:38:47,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059951872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:47,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:47,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:47,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009232891] [2024-06-27 19:38:47,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:47,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:47,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:47,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:47,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:47,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:47,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 674 transitions, 8290 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:47,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:47,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:47,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:49,518 INFO L124 PetriNetUnfolderBase]: 4905/8419 cut-off events. [2024-06-27 19:38:49,518 INFO L125 PetriNetUnfolderBase]: For 1687888/1687888 co-relation queries the response was YES. [2024-06-27 19:38:49,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64684 conditions, 8419 events. 4905/8419 cut-off events. For 1687888/1687888 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 62256 event pairs, 1217 based on Foata normal form. 6/8419 useless extension candidates. Maximal degree in co-relation 64446. Up to 7477 conditions per place. [2024-06-27 19:38:49,662 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 651 selfloop transitions, 59 changer transitions 0/718 dead transitions. [2024-06-27 19:38:49,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 718 transitions, 10235 flow [2024-06-27 19:38:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:38:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:38:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 298 transitions. [2024-06-27 19:38:49,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590994371482176 [2024-06-27 19:38:49,663 INFO L175 Difference]: Start difference. First operand has 550 places, 674 transitions, 8290 flow. Second operand 13 states and 298 transitions. [2024-06-27 19:38:49,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 718 transitions, 10235 flow [2024-06-27 19:39:03,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 718 transitions, 9982 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 19:39:03,176 INFO L231 Difference]: Finished difference. Result has 557 places, 678 transitions, 8278 flow [2024-06-27 19:39:03,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8044, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8278, PETRI_PLACES=557, PETRI_TRANSITIONS=678} [2024-06-27 19:39:03,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 515 predicate places. [2024-06-27 19:39:03,177 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 678 transitions, 8278 flow [2024-06-27 19:39:03,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:03,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:03,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:03,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-27 19:39:03,177 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:03,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:03,177 INFO L85 PathProgramCache]: Analyzing trace with hash -604511316, now seen corresponding path program 11 times [2024-06-27 19:39:03,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:03,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27107174] [2024-06-27 19:39:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:03,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:03,269 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 19:39:03,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:03,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27107174] [2024-06-27 19:39:03,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27107174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:03,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:03,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:39:03,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56209462] [2024-06-27 19:39:03,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:03,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:39:03,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:03,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:39:03,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:39:03,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:39:03,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 678 transitions, 8278 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:03,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:03,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:39:03,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:05,751 INFO L124 PetriNetUnfolderBase]: 4941/8473 cut-off events. [2024-06-27 19:39:05,751 INFO L125 PetriNetUnfolderBase]: For 1665875/1665875 co-relation queries the response was YES. [2024-06-27 19:39:05,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64600 conditions, 8473 events. 4941/8473 cut-off events. For 1665875/1665875 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 62679 event pairs, 1217 based on Foata normal form. 6/8467 useless extension candidates. Maximal degree in co-relation 64363. Up to 7433 conditions per place. [2024-06-27 19:39:05,889 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 649 selfloop transitions, 66 changer transitions 0/723 dead transitions. [2024-06-27 19:39:05,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 723 transitions, 10217 flow [2024-06-27 19:39:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:39:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:39:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 280 transitions. [2024-06-27 19:39:05,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-27 19:39:05,890 INFO L175 Difference]: Start difference. First operand has 557 places, 678 transitions, 8278 flow. Second operand 12 states and 280 transitions. [2024-06-27 19:39:05,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 723 transitions, 10217 flow [2024-06-27 19:39:18,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 723 transitions, 10071 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-27 19:39:18,516 INFO L231 Difference]: Finished difference. Result has 561 places, 683 transitions, 8383 flow [2024-06-27 19:39:18,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8132, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8383, PETRI_PLACES=561, PETRI_TRANSITIONS=683} [2024-06-27 19:39:18,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 519 predicate places. [2024-06-27 19:39:18,516 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 683 transitions, 8383 flow [2024-06-27 19:39:18,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:18,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:18,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:18,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-27 19:39:18,516 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:18,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:18,517 INFO L85 PathProgramCache]: Analyzing trace with hash -604511130, now seen corresponding path program 11 times [2024-06-27 19:39:18,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:18,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478896718] [2024-06-27 19:39:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:18,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:18,594 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 19:39:18,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:18,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478896718] [2024-06-27 19:39:18,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478896718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:18,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:18,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:18,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41235316] [2024-06-27 19:39:18,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:18,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:18,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:18,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:18,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:18,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:39:18,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 683 transitions, 8383 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:39:18,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:18,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:39:18,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:20,977 INFO L124 PetriNetUnfolderBase]: 4961/8483 cut-off events. [2024-06-27 19:39:20,978 INFO L125 PetriNetUnfolderBase]: For 1689479/1689479 co-relation queries the response was YES. [2024-06-27 19:39:21,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65043 conditions, 8483 events. 4961/8483 cut-off events. For 1689479/1689479 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 62443 event pairs, 803 based on Foata normal form. 6/8481 useless extension candidates. Maximal degree in co-relation 64803. Up to 6696 conditions per place. [2024-06-27 19:39:21,117 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 573 selfloop transitions, 135 changer transitions 0/716 dead transitions. [2024-06-27 19:39:21,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 716 transitions, 10258 flow [2024-06-27 19:39:21,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:39:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:39:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:39:21,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-27 19:39:21,118 INFO L175 Difference]: Start difference. First operand has 561 places, 683 transitions, 8383 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:39:21,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 716 transitions, 10258 flow Killed by 15