./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe030_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/safe030_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe030_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 01:01:22,264 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:01:22,344 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:01:22,349 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:01:22,350 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:01:22,379 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:01:22,380 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:01:22,380 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:01:22,381 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:01:22,385 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:01:22,385 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:01:22,385 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:01:22,386 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:01:22,387 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:01:22,388 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:01:22,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:01:22,388 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:01:22,389 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:01:22,389 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:01:22,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:01:22,390 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:01:22,391 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:01:22,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:01:22,391 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:01:22,391 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:01:22,392 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:01:22,392 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:01:22,392 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:01:22,393 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:01:22,393 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:01:22,394 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:01:22,394 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:01:22,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:01:22,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:01:22,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:01:22,395 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:01:22,395 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:01:22,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:01:22,396 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:01:22,397 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:01:22,397 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:01:22,397 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:01:22,397 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:01:22,397 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:01:22,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:01:22,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:01:22,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:01:22,633 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:01:22,634 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:01:22,635 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe030_tso.yml/witness.yml [2024-06-28 01:01:22,811 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:01:22,812 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:01:22,812 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-28 01:01:23,941 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:01:24,223 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:01:24,223 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-28 01:01:24,242 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e81052cda/bf2fd1f61d6f41a08c0d3ab62f5a8b97/FLAG8c6aaa03f [2024-06-28 01:01:24,254 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e81052cda/bf2fd1f61d6f41a08c0d3ab62f5a8b97 [2024-06-28 01:01:24,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:01:24,256 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:01:24,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:01:24,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:01:24,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:01:24,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:01:22" (1/2) ... [2024-06-28 01:01:24,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ab05b5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:01:24, skipping insertion in model container [2024-06-28 01:01:24,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:01:22" (1/2) ... [2024-06-28 01:01:24,269 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@355232ea and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:01:24, skipping insertion in model container [2024-06-28 01:01:24,270 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:01:24" (2/2) ... [2024-06-28 01:01:24,270 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ab05b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24, skipping insertion in model container [2024-06-28 01:01:24,270 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:01:24" (2/2) ... [2024-06-28 01:01:24,271 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:01:24,310 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:01:24,312 INFO L97 edCorrectnessWitness]: Location invariant before [L777-L777] ((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (((0 <= __unbuffered_cnt && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2))) [2024-06-28 01:01:24,312 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (((0 <= __unbuffered_cnt && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2))) [2024-06-28 01:01:24,312 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] ((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (((0 <= __unbuffered_cnt && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2))) [2024-06-28 01:01:24,312 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:01:24,312 INFO L106 edCorrectnessWitness]: ghost_update [L775-L775] multithreaded = 1; [2024-06-28 01:01:24,363 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:01:24,547 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i[945,958] [2024-06-28 01:01:24,700 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:01:24,714 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 01:01:24,751 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:01:24,842 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:01:24,890 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:01:24,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24 WrapperNode [2024-06-28 01:01:24,891 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:01:24,892 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:01:24,892 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:01:24,892 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:01:24,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:24,933 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:24,966 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-06-28 01:01:24,967 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:01:24,968 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:01:24,968 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:01:24,968 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:01:24,978 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:24,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:24,983 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:24,996 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 01:01:24,996 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:24,997 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:25,002 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:25,010 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:25,011 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:25,012 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:25,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:01:25,015 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:01:25,015 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:01:25,015 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:01:25,016 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (1/1) ... [2024-06-28 01:01:25,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:01:25,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:01:25,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 01:01:25,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 01:01:25,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:01:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:01:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 01:01:25,075 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 01:01:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 01:01:25,075 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 01:01:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 01:01:25,076 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 01:01:25,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:01:25,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:01:25,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:01:25,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:01:25,078 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:01:25,174 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:01:25,176 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:01:25,327 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:01:25,327 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:01:25,408 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:01:25,408 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 01:01:25,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:01:25 BoogieIcfgContainer [2024-06-28 01:01:25,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:01:25,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:01:25,411 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:01:25,414 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:01:25,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:01:22" (1/4) ... [2024-06-28 01:01:25,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711e899c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:01:25, skipping insertion in model container [2024-06-28 01:01:25,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:01:24" (2/4) ... [2024-06-28 01:01:25,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711e899c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:01:25, skipping insertion in model container [2024-06-28 01:01:25,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:01:24" (3/4) ... [2024-06-28 01:01:25,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711e899c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:01:25, skipping insertion in model container [2024-06-28 01:01:25,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:01:25" (4/4) ... [2024-06-28 01:01:25,423 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_tso.i [2024-06-28 01:01:25,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:01:25,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 01:01:25,459 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:01:25,521 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 01:01:25,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 01:01:25,589 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-28 01:01:25,589 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:01:25,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-28 01:01:25,592 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 01:01:25,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-28 01:01:25,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:01:25,610 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;@70fbcbb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:01:25,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 01:01:25,617 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:01:25,618 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 01:01:25,618 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:01:25,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:25,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 01:01:25,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:25,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:25,625 INFO L85 PathProgramCache]: Analyzing trace with hash 202549122, now seen corresponding path program 1 times [2024-06-28 01:01:25,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:25,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942213726] [2024-06-28 01:01:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:25,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:26,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:26,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942213726] [2024-06-28 01:01:26,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942213726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:26,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:26,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 01:01:26,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062585272] [2024-06-28 01:01:26,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:26,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:01:26,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:01:26,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:01:26,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:26,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 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) [2024-06-28 01:01:26,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:26,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:26,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:26,513 INFO L124 PetriNetUnfolderBase]: 1546/2449 cut-off events. [2024-06-28 01:01:26,529 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-28 01:01:26,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 2449 events. 1546/2449 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13796 event pairs, 1176 based on Foata normal form. 1/2375 useless extension candidates. Maximal degree in co-relation 4793. Up to 2279 conditions per place. [2024-06-28 01:01:26,551 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 34 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-28 01:01:26,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 193 flow [2024-06-28 01:01:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:01:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:01:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-28 01:01:26,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-28 01:01:26,602 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 92 transitions. [2024-06-28 01:01:26,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 193 flow [2024-06-28 01:01:26,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:26,612 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-28 01:01:26,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-28 01:01:26,618 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-28 01:01:26,622 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-28 01:01:26,622 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) [2024-06-28 01:01:26,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:26,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:26,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:01:26,623 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:26,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:26,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1376198433, now seen corresponding path program 1 times [2024-06-28 01:01:26,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:26,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926174409] [2024-06-28 01:01:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:26,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:26,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:26,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926174409] [2024-06-28 01:01:26,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926174409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:26,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:26,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:01:26,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560062398] [2024-06-28 01:01:26,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:26,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:01:26,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:26,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:01:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:01:26,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:26,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 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) [2024-06-28 01:01:26,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:26,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:26,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:27,125 INFO L124 PetriNetUnfolderBase]: 1540/2709 cut-off events. [2024-06-28 01:01:27,125 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-06-28 01:01:27,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5636 conditions, 2709 events. 1540/2709 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16440 event pairs, 1008 based on Foata normal form. 3/2656 useless extension candidates. Maximal degree in co-relation 5624. Up to 2251 conditions per place. [2024-06-28 01:01:27,147 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 43 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-06-28 01:01:27,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 268 flow [2024-06-28 01:01:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:01:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:01:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-28 01:01:27,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-06-28 01:01:27,151 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 121 transitions. [2024-06-28 01:01:27,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 268 flow [2024-06-28 01:01:27,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:01:27,155 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 150 flow [2024-06-28 01:01:27,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-28 01:01:27,156 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2024-06-28 01:01:27,157 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 150 flow [2024-06-28 01:01:27,157 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) [2024-06-28 01:01:27,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:27,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:27,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:01:27,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:27,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash -287520835, now seen corresponding path program 1 times [2024-06-28 01:01:27,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:27,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396809576] [2024-06-28 01:01:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:27,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:27,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:27,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396809576] [2024-06-28 01:01:27,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396809576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:27,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:27,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:27,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37425254] [2024-06-28 01:01:27,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:27,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:27,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:27,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:27,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:27,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:27,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:27,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:27,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:27,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:27,529 INFO L124 PetriNetUnfolderBase]: 1554/2529 cut-off events. [2024-06-28 01:01:27,530 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2024-06-28 01:01:27,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6047 conditions, 2529 events. 1554/2529 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14603 event pairs, 572 based on Foata normal form. 5/2509 useless extension candidates. Maximal degree in co-relation 6033. Up to 2183 conditions per place. [2024-06-28 01:01:27,545 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 58 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-28 01:01:27,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 430 flow [2024-06-28 01:01:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-28 01:01:27,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7022222222222222 [2024-06-28 01:01:27,547 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 150 flow. Second operand 5 states and 158 transitions. [2024-06-28 01:01:27,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 430 flow [2024-06-28 01:01:27,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 416 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:27,551 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 249 flow [2024-06-28 01:01:27,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-28 01:01:27,552 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2024-06-28 01:01:27,552 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 249 flow [2024-06-28 01:01:27,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:27,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:27,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:27,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:01:27,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:27,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:27,554 INFO L85 PathProgramCache]: Analyzing trace with hash -571312120, now seen corresponding path program 1 times [2024-06-28 01:01:27,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:27,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688239124] [2024-06-28 01:01:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:27,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:27,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688239124] [2024-06-28 01:01:27,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688239124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:27,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:27,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:27,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093296094] [2024-06-28 01:01:27,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:27,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:27,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:27,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:27,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 249 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) [2024-06-28 01:01:27,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:27,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:27,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:28,026 INFO L124 PetriNetUnfolderBase]: 1576/2731 cut-off events. [2024-06-28 01:01:28,027 INFO L125 PetriNetUnfolderBase]: For 2903/2906 co-relation queries the response was YES. [2024-06-28 01:01:28,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7399 conditions, 2731 events. 1576/2731 cut-off events. For 2903/2906 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16615 event pairs, 555 based on Foata normal form. 12/2694 useless extension candidates. Maximal degree in co-relation 7382. Up to 2149 conditions per place. [2024-06-28 01:01:28,046 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 64 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-28 01:01:28,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 96 transitions, 541 flow [2024-06-28 01:01:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-28 01:01:28,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-28 01:01:28,050 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 249 flow. Second operand 6 states and 184 transitions. [2024-06-28 01:01:28,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 96 transitions, 541 flow [2024-06-28 01:01:28,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 533 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 01:01:28,058 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 305 flow [2024-06-28 01:01:28,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-28 01:01:28,060 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2024-06-28 01:01:28,060 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 305 flow [2024-06-28 01:01:28,061 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) [2024-06-28 01:01:28,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:28,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:28,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:01:28,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:28,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1813654217, now seen corresponding path program 1 times [2024-06-28 01:01:28,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:28,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914195189] [2024-06-28 01:01:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:28,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:28,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:28,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914195189] [2024-06-28 01:01:28,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914195189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:28,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:28,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:01:28,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271831665] [2024-06-28 01:01:28,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:28,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:01:28,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:28,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:01:28,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:01:28,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:28,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 305 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:28,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:28,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:28,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:28,391 INFO L124 PetriNetUnfolderBase]: 1571/2503 cut-off events. [2024-06-28 01:01:28,392 INFO L125 PetriNetUnfolderBase]: For 4049/4049 co-relation queries the response was YES. [2024-06-28 01:01:28,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7792 conditions, 2503 events. 1571/2503 cut-off events. For 4049/4049 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14153 event pairs, 498 based on Foata normal form. 2/2484 useless extension candidates. Maximal degree in co-relation 7772. Up to 2304 conditions per place. [2024-06-28 01:01:28,414 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 53 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-06-28 01:01:28,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 461 flow [2024-06-28 01:01:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:01:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:01:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-28 01:01:28,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 01:01:28,417 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 305 flow. Second operand 4 states and 116 transitions. [2024-06-28 01:01:28,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 461 flow [2024-06-28 01:01:28,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 411 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 01:01:28,427 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 277 flow [2024-06-28 01:01:28,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-28 01:01:28,430 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2024-06-28 01:01:28,430 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 277 flow [2024-06-28 01:01:28,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:28,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:28,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:28,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 01:01:28,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:28,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:28,431 INFO L85 PathProgramCache]: Analyzing trace with hash -389223331, now seen corresponding path program 1 times [2024-06-28 01:01:28,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:28,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860621093] [2024-06-28 01:01:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:28,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:28,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:28,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860621093] [2024-06-28 01:01:28,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860621093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:28,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:28,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:28,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760327999] [2024-06-28 01:01:28,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:28,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:28,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:28,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:28,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:28,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:28,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:28,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:28,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:28,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:28,761 INFO L124 PetriNetUnfolderBase]: 1579/2532 cut-off events. [2024-06-28 01:01:28,762 INFO L125 PetriNetUnfolderBase]: For 4427/4427 co-relation queries the response was YES. [2024-06-28 01:01:28,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7735 conditions, 2532 events. 1579/2532 cut-off events. For 4427/4427 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14228 event pairs, 473 based on Foata normal form. 3/2533 useless extension candidates. Maximal degree in co-relation 7714. Up to 2265 conditions per place. [2024-06-28 01:01:28,780 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 63 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2024-06-28 01:01:28,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 563 flow [2024-06-28 01:01:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-28 01:01:28,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2024-06-28 01:01:28,782 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 277 flow. Second operand 5 states and 148 transitions. [2024-06-28 01:01:28,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 563 flow [2024-06-28 01:01:28,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 543 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:28,788 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 380 flow [2024-06-28 01:01:28,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-06-28 01:01:28,789 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 17 predicate places. [2024-06-28 01:01:28,789 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 380 flow [2024-06-28 01:01:28,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:28,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:28,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:28,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 01:01:28,790 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:28,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash 770916584, now seen corresponding path program 1 times [2024-06-28 01:01:28,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:28,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328533297] [2024-06-28 01:01:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:28,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:28,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:28,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328533297] [2024-06-28 01:01:28,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328533297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:28,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:28,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:28,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593965165] [2024-06-28 01:01:28,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:28,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:28,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:28,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:28,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:28,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:28,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 380 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:28,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:28,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:28,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:29,158 INFO L124 PetriNetUnfolderBase]: 1591/2559 cut-off events. [2024-06-28 01:01:29,158 INFO L125 PetriNetUnfolderBase]: For 6638/6644 co-relation queries the response was YES. [2024-06-28 01:01:29,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8753 conditions, 2559 events. 1591/2559 cut-off events. For 6638/6644 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14398 event pairs, 475 based on Foata normal form. 8/2561 useless extension candidates. Maximal degree in co-relation 8730. Up to 2231 conditions per place. [2024-06-28 01:01:29,177 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 67 selfloop transitions, 18 changer transitions 0/98 dead transitions. [2024-06-28 01:01:29,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 658 flow [2024-06-28 01:01:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:29,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-28 01:01:29,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6711111111111111 [2024-06-28 01:01:29,178 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 380 flow. Second operand 5 states and 151 transitions. [2024-06-28 01:01:29,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 658 flow [2024-06-28 01:01:29,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 644 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-28 01:01:29,188 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 436 flow [2024-06-28 01:01:29,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-28 01:01:29,189 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2024-06-28 01:01:29,189 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 436 flow [2024-06-28 01:01:29,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:29,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:29,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:29,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 01:01:29,190 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:29,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:29,191 INFO L85 PathProgramCache]: Analyzing trace with hash 835059350, now seen corresponding path program 2 times [2024-06-28 01:01:29,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:29,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039941758] [2024-06-28 01:01:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:29,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:29,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:29,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039941758] [2024-06-28 01:01:29,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039941758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:29,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:29,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:29,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451661765] [2024-06-28 01:01:29,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:29,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:29,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:29,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:29,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:29,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:29,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 436 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:29,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:29,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:29,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:29,579 INFO L124 PetriNetUnfolderBase]: 1579/2540 cut-off events. [2024-06-28 01:01:29,579 INFO L125 PetriNetUnfolderBase]: For 7388/7392 co-relation queries the response was YES. [2024-06-28 01:01:29,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 2540 events. 1579/2540 cut-off events. For 7388/7392 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14301 event pairs, 493 based on Foata normal form. 3/2533 useless extension candidates. Maximal degree in co-relation 8808. Up to 2215 conditions per place. [2024-06-28 01:01:29,605 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 61 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2024-06-28 01:01:29,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 646 flow [2024-06-28 01:01:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-28 01:01:29,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-28 01:01:29,607 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 436 flow. Second operand 5 states and 147 transitions. [2024-06-28 01:01:29,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 646 flow [2024-06-28 01:01:29,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 93 transitions, 619 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:29,619 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 455 flow [2024-06-28 01:01:29,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=455, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-06-28 01:01:29,621 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 25 predicate places. [2024-06-28 01:01:29,621 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 455 flow [2024-06-28 01:01:29,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:29,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:29,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:29,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 01:01:29,622 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:29,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:29,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1059048542, now seen corresponding path program 1 times [2024-06-28 01:01:29,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:29,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217350439] [2024-06-28 01:01:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:29,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:29,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:29,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217350439] [2024-06-28 01:01:29,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217350439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:29,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:29,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165143946] [2024-06-28 01:01:29,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:29,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:29,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:29,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:29,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:29,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:29,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:29,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:29,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:29,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:30,097 INFO L124 PetriNetUnfolderBase]: 1833/2997 cut-off events. [2024-06-28 01:01:30,098 INFO L125 PetriNetUnfolderBase]: For 9417/9417 co-relation queries the response was YES. [2024-06-28 01:01:30,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10310 conditions, 2997 events. 1833/2997 cut-off events. For 9417/9417 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17644 event pairs, 466 based on Foata normal form. 8/2981 useless extension candidates. Maximal degree in co-relation 10283. Up to 1997 conditions per place. [2024-06-28 01:01:30,123 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 85 selfloop transitions, 35 changer transitions 0/133 dead transitions. [2024-06-28 01:01:30,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 133 transitions, 993 flow [2024-06-28 01:01:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-28 01:01:30,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7148148148148148 [2024-06-28 01:01:30,125 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 455 flow. Second operand 6 states and 193 transitions. [2024-06-28 01:01:30,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 133 transitions, 993 flow [2024-06-28 01:01:30,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 133 transitions, 930 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:30,142 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 641 flow [2024-06-28 01:01:30,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=641, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2024-06-28 01:01:30,143 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 29 predicate places. [2024-06-28 01:01:30,143 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 641 flow [2024-06-28 01:01:30,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:30,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:30,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:30,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 01:01:30,144 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:30,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:30,145 INFO L85 PathProgramCache]: Analyzing trace with hash 117037562, now seen corresponding path program 2 times [2024-06-28 01:01:30,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:30,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385753951] [2024-06-28 01:01:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:30,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:30,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:30,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385753951] [2024-06-28 01:01:30,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385753951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:30,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:30,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:30,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254168200] [2024-06-28 01:01:30,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:30,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:30,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:30,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:30,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:30,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:30,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 641 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:30,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:30,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:30,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:30,609 INFO L124 PetriNetUnfolderBase]: 1904/3079 cut-off events. [2024-06-28 01:01:30,610 INFO L125 PetriNetUnfolderBase]: For 14147/14151 co-relation queries the response was YES. [2024-06-28 01:01:30,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12821 conditions, 3079 events. 1904/3079 cut-off events. For 14147/14151 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18029 event pairs, 482 based on Foata normal form. 5/3066 useless extension candidates. Maximal degree in co-relation 12790. Up to 2044 conditions per place. [2024-06-28 01:01:30,637 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 87 selfloop transitions, 46 changer transitions 0/146 dead transitions. [2024-06-28 01:01:30,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 146 transitions, 1266 flow [2024-06-28 01:01:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-28 01:01:30,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-28 01:01:30,639 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 641 flow. Second operand 6 states and 189 transitions. [2024-06-28 01:01:30,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 146 transitions, 1266 flow [2024-06-28 01:01:30,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 146 transitions, 1226 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-28 01:01:30,672 INFO L231 Difference]: Finished difference. Result has 87 places, 110 transitions, 926 flow [2024-06-28 01:01:30,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=926, PETRI_PLACES=87, PETRI_TRANSITIONS=110} [2024-06-28 01:01:30,673 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 38 predicate places. [2024-06-28 01:01:30,674 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 110 transitions, 926 flow [2024-06-28 01:01:30,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:30,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:30,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:30,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 01:01:30,674 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:30,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:30,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1395744334, now seen corresponding path program 3 times [2024-06-28 01:01:30,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:30,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369169154] [2024-06-28 01:01:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:30,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:30,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:30,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369169154] [2024-06-28 01:01:30,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369169154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:30,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:30,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:30,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880761901] [2024-06-28 01:01:30,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:30,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:30,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:30,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:30,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 110 transitions, 926 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:30,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:30,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:30,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:31,133 INFO L124 PetriNetUnfolderBase]: 1967/3187 cut-off events. [2024-06-28 01:01:31,133 INFO L125 PetriNetUnfolderBase]: For 19275/19279 co-relation queries the response was YES. [2024-06-28 01:01:31,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14819 conditions, 3187 events. 1967/3187 cut-off events. For 19275/19279 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18857 event pairs, 484 based on Foata normal form. 5/3172 useless extension candidates. Maximal degree in co-relation 14782. Up to 2092 conditions per place. [2024-06-28 01:01:31,165 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 83 selfloop transitions, 58 changer transitions 0/154 dead transitions. [2024-06-28 01:01:31,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 154 transitions, 1512 flow [2024-06-28 01:01:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-28 01:01:31,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-28 01:01:31,167 INFO L175 Difference]: Start difference. First operand has 87 places, 110 transitions, 926 flow. Second operand 6 states and 189 transitions. [2024-06-28 01:01:31,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 154 transitions, 1512 flow [2024-06-28 01:01:31,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 154 transitions, 1480 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-28 01:01:31,207 INFO L231 Difference]: Finished difference. Result has 95 places, 121 transitions, 1210 flow [2024-06-28 01:01:31,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1210, PETRI_PLACES=95, PETRI_TRANSITIONS=121} [2024-06-28 01:01:31,207 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 46 predicate places. [2024-06-28 01:01:31,208 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 121 transitions, 1210 flow [2024-06-28 01:01:31,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:31,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:31,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:31,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 01:01:31,208 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:31,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:31,209 INFO L85 PathProgramCache]: Analyzing trace with hash -381417700, now seen corresponding path program 1 times [2024-06-28 01:01:31,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:31,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695980165] [2024-06-28 01:01:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:31,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:31,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695980165] [2024-06-28 01:01:31,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695980165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:31,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:31,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:31,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613068142] [2024-06-28 01:01:31,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:31,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:31,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:31,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:31,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:31,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:31,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 121 transitions, 1210 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:31,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:31,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:31,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:31,724 INFO L124 PetriNetUnfolderBase]: 1980/3200 cut-off events. [2024-06-28 01:01:31,724 INFO L125 PetriNetUnfolderBase]: For 22674/22674 co-relation queries the response was YES. [2024-06-28 01:01:31,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16091 conditions, 3200 events. 1980/3200 cut-off events. For 22674/22674 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18805 event pairs, 429 based on Foata normal form. 6/3203 useless extension candidates. Maximal degree in co-relation 16049. Up to 2771 conditions per place. [2024-06-28 01:01:31,760 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 122 selfloop transitions, 19 changer transitions 0/154 dead transitions. [2024-06-28 01:01:31,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 154 transitions, 1638 flow [2024-06-28 01:01:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 01:01:31,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 01:01:31,762 INFO L175 Difference]: Start difference. First operand has 95 places, 121 transitions, 1210 flow. Second operand 6 states and 175 transitions. [2024-06-28 01:01:31,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 154 transitions, 1638 flow [2024-06-28 01:01:31,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 154 transitions, 1558 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:31,816 INFO L231 Difference]: Finished difference. Result has 99 places, 124 transitions, 1214 flow [2024-06-28 01:01:31,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1214, PETRI_PLACES=99, PETRI_TRANSITIONS=124} [2024-06-28 01:01:31,817 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 50 predicate places. [2024-06-28 01:01:31,817 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 124 transitions, 1214 flow [2024-06-28 01:01:31,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:31,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:31,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:31,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 01:01:31,820 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:31,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:31,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1067316502, now seen corresponding path program 1 times [2024-06-28 01:01:31,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:31,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313900977] [2024-06-28 01:01:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:31,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:31,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:31,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313900977] [2024-06-28 01:01:31,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313900977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:31,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:31,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:01:31,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200897169] [2024-06-28 01:01:31,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:31,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:01:31,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:31,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:01:31,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:01:31,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:31,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 124 transitions, 1214 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:31,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:31,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:31,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:32,256 INFO L124 PetriNetUnfolderBase]: 1977/3160 cut-off events. [2024-06-28 01:01:32,257 INFO L125 PetriNetUnfolderBase]: For 22695/22695 co-relation queries the response was YES. [2024-06-28 01:01:32,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15841 conditions, 3160 events. 1977/3160 cut-off events. For 22695/22695 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 18345 event pairs, 440 based on Foata normal form. 1/3157 useless extension candidates. Maximal degree in co-relation 15798. Up to 2865 conditions per place. [2024-06-28 01:01:32,292 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 116 selfloop transitions, 7 changer transitions 0/136 dead transitions. [2024-06-28 01:01:32,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 136 transitions, 1488 flow [2024-06-28 01:01:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:01:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:01:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-06-28 01:01:32,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 01:01:32,294 INFO L175 Difference]: Start difference. First operand has 99 places, 124 transitions, 1214 flow. Second operand 4 states and 112 transitions. [2024-06-28 01:01:32,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 136 transitions, 1488 flow [2024-06-28 01:01:32,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 136 transitions, 1422 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 01:01:32,340 INFO L231 Difference]: Finished difference. Result has 99 places, 124 transitions, 1168 flow [2024-06-28 01:01:32,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1168, PETRI_PLACES=99, PETRI_TRANSITIONS=124} [2024-06-28 01:01:32,341 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 50 predicate places. [2024-06-28 01:01:32,341 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 124 transitions, 1168 flow [2024-06-28 01:01:32,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:32,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:32,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:32,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 01:01:32,342 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:32,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:32,342 INFO L85 PathProgramCache]: Analyzing trace with hash 854018702, now seen corresponding path program 1 times [2024-06-28 01:01:32,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:32,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146829787] [2024-06-28 01:01:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:32,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:32,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:32,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146829787] [2024-06-28 01:01:32,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146829787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:32,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:32,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:32,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568975662] [2024-06-28 01:01:32,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:32,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:32,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:32,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:32,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:32,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:32,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 124 transitions, 1168 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:32,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:32,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:32,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:32,873 INFO L124 PetriNetUnfolderBase]: 2020/3275 cut-off events. [2024-06-28 01:01:32,873 INFO L125 PetriNetUnfolderBase]: For 24846/24846 co-relation queries the response was YES. [2024-06-28 01:01:32,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16113 conditions, 3275 events. 2020/3275 cut-off events. For 24846/24846 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19410 event pairs, 463 based on Foata normal form. 4/3253 useless extension candidates. Maximal degree in co-relation 16069. Up to 2150 conditions per place. [2024-06-28 01:01:32,914 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 97 selfloop transitions, 63 changer transitions 0/173 dead transitions. [2024-06-28 01:01:32,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 173 transitions, 1824 flow [2024-06-28 01:01:32,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-28 01:01:32,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-06-28 01:01:32,916 INFO L175 Difference]: Start difference. First operand has 99 places, 124 transitions, 1168 flow. Second operand 6 states and 195 transitions. [2024-06-28 01:01:32,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 173 transitions, 1824 flow [2024-06-28 01:01:32,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 173 transitions, 1802 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:32,964 INFO L231 Difference]: Finished difference. Result has 104 places, 134 transitions, 1463 flow [2024-06-28 01:01:32,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1463, PETRI_PLACES=104, PETRI_TRANSITIONS=134} [2024-06-28 01:01:32,965 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 55 predicate places. [2024-06-28 01:01:32,966 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 134 transitions, 1463 flow [2024-06-28 01:01:32,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:32,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:32,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:32,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 01:01:32,967 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:32,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash -801286948, now seen corresponding path program 2 times [2024-06-28 01:01:32,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:32,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267012838] [2024-06-28 01:01:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:32,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:33,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:33,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267012838] [2024-06-28 01:01:33,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267012838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:33,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:33,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:33,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976339963] [2024-06-28 01:01:33,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:33,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:33,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:33,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:33,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:33,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:33,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 134 transitions, 1463 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:33,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:33,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:33,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:33,549 INFO L124 PetriNetUnfolderBase]: 2063/3378 cut-off events. [2024-06-28 01:01:33,549 INFO L125 PetriNetUnfolderBase]: For 31350/31350 co-relation queries the response was YES. [2024-06-28 01:01:33,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18153 conditions, 3378 events. 2063/3378 cut-off events. For 31350/31350 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20336 event pairs, 485 based on Foata normal form. 4/3348 useless extension candidates. Maximal degree in co-relation 18107. Up to 2189 conditions per place. [2024-06-28 01:01:33,598 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 96 selfloop transitions, 65 changer transitions 0/174 dead transitions. [2024-06-28 01:01:33,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 174 transitions, 2049 flow [2024-06-28 01:01:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-28 01:01:33,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-06-28 01:01:33,599 INFO L175 Difference]: Start difference. First operand has 104 places, 134 transitions, 1463 flow. Second operand 6 states and 190 transitions. [2024-06-28 01:01:33,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 174 transitions, 2049 flow [2024-06-28 01:01:33,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 174 transitions, 1952 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:33,657 INFO L231 Difference]: Finished difference. Result has 108 places, 139 transitions, 1577 flow [2024-06-28 01:01:33,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1577, PETRI_PLACES=108, PETRI_TRANSITIONS=139} [2024-06-28 01:01:33,659 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 59 predicate places. [2024-06-28 01:01:33,659 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 139 transitions, 1577 flow [2024-06-28 01:01:33,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:33,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:33,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:33,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 01:01:33,660 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:33,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 180301248, now seen corresponding path program 3 times [2024-06-28 01:01:33,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:33,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116185421] [2024-06-28 01:01:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:33,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:33,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:33,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116185421] [2024-06-28 01:01:33,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116185421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:33,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:33,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:33,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978170021] [2024-06-28 01:01:33,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:33,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:33,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:33,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:33,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:33,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:33,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 139 transitions, 1577 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:33,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:33,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:33,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:34,193 INFO L124 PetriNetUnfolderBase]: 2098/3454 cut-off events. [2024-06-28 01:01:34,193 INFO L125 PetriNetUnfolderBase]: For 35885/35897 co-relation queries the response was YES. [2024-06-28 01:01:34,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18824 conditions, 3454 events. 2098/3454 cut-off events. For 35885/35897 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21120 event pairs, 554 based on Foata normal form. 10/3434 useless extension candidates. Maximal degree in co-relation 18777. Up to 2225 conditions per place. [2024-06-28 01:01:34,297 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 100 selfloop transitions, 64 changer transitions 0/177 dead transitions. [2024-06-28 01:01:34,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 177 transitions, 2153 flow [2024-06-28 01:01:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-28 01:01:34,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-28 01:01:34,299 INFO L175 Difference]: Start difference. First operand has 108 places, 139 transitions, 1577 flow. Second operand 6 states and 184 transitions. [2024-06-28 01:01:34,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 177 transitions, 2153 flow [2024-06-28 01:01:34,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 177 transitions, 2034 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:34,369 INFO L231 Difference]: Finished difference. Result has 112 places, 148 transitions, 1758 flow [2024-06-28 01:01:34,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1758, PETRI_PLACES=112, PETRI_TRANSITIONS=148} [2024-06-28 01:01:34,370 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2024-06-28 01:01:34,370 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 148 transitions, 1758 flow [2024-06-28 01:01:34,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:34,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:34,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:34,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 01:01:34,371 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:34,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:34,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1272924982, now seen corresponding path program 1 times [2024-06-28 01:01:34,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:34,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050914970] [2024-06-28 01:01:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:34,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:34,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:34,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050914970] [2024-06-28 01:01:34,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050914970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:34,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:34,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:34,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461352360] [2024-06-28 01:01:34,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:34,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:34,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:34,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:34,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 148 transitions, 1758 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:34,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:34,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:34,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:34,849 INFO L124 PetriNetUnfolderBase]: 2094/3411 cut-off events. [2024-06-28 01:01:34,849 INFO L125 PetriNetUnfolderBase]: For 38097/38106 co-relation queries the response was YES. [2024-06-28 01:01:34,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19386 conditions, 3411 events. 2094/3411 cut-off events. For 38097/38106 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20402 event pairs, 743 based on Foata normal form. 10/3397 useless extension candidates. Maximal degree in co-relation 19337. Up to 2974 conditions per place. [2024-06-28 01:01:34,885 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 137 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2024-06-28 01:01:34,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 166 transitions, 2163 flow [2024-06-28 01:01:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-28 01:01:34,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 01:01:34,887 INFO L175 Difference]: Start difference. First operand has 112 places, 148 transitions, 1758 flow. Second operand 5 states and 140 transitions. [2024-06-28 01:01:34,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 166 transitions, 2163 flow [2024-06-28 01:01:34,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 166 transitions, 2085 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:34,977 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1755 flow [2024-06-28 01:01:34,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1755, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-28 01:01:34,977 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 66 predicate places. [2024-06-28 01:01:34,978 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1755 flow [2024-06-28 01:01:34,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:34,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:34,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:34,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 01:01:34,978 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:34,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1995849601, now seen corresponding path program 1 times [2024-06-28 01:01:34,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:34,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978868013] [2024-06-28 01:01:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:34,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:35,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:35,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978868013] [2024-06-28 01:01:35,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978868013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:35,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:35,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:35,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007242835] [2024-06-28 01:01:35,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:35,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:35,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:35,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:35,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1755 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:35,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:35,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:35,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:35,528 INFO L124 PetriNetUnfolderBase]: 2121/3514 cut-off events. [2024-06-28 01:01:35,528 INFO L125 PetriNetUnfolderBase]: For 40980/40986 co-relation queries the response was YES. [2024-06-28 01:01:35,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19289 conditions, 3514 events. 2121/3514 cut-off events. For 40980/40986 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 21482 event pairs, 527 based on Foata normal form. 8/3483 useless extension candidates. Maximal degree in co-relation 19238. Up to 2837 conditions per place. [2024-06-28 01:01:35,559 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 153 selfloop transitions, 22 changer transitions 0/188 dead transitions. [2024-06-28 01:01:35,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 188 transitions, 2329 flow [2024-06-28 01:01:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-28 01:01:35,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-28 01:01:35,561 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1755 flow. Second operand 6 states and 177 transitions. [2024-06-28 01:01:35,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 188 transitions, 2329 flow [2024-06-28 01:01:35,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 188 transitions, 2233 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:35,664 INFO L231 Difference]: Finished difference. Result has 118 places, 154 transitions, 1794 flow [2024-06-28 01:01:35,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1794, PETRI_PLACES=118, PETRI_TRANSITIONS=154} [2024-06-28 01:01:35,664 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 69 predicate places. [2024-06-28 01:01:35,665 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 154 transitions, 1794 flow [2024-06-28 01:01:35,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:35,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:35,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:35,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 01:01:35,665 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:35,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:35,666 INFO L85 PathProgramCache]: Analyzing trace with hash 88985335, now seen corresponding path program 2 times [2024-06-28 01:01:35,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:35,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569107851] [2024-06-28 01:01:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:35,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:35,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:35,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569107851] [2024-06-28 01:01:35,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569107851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:35,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:35,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:35,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761733044] [2024-06-28 01:01:35,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:35,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:35,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:35,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:35,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 154 transitions, 1794 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:35,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:35,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:35,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:36,201 INFO L124 PetriNetUnfolderBase]: 2113/3398 cut-off events. [2024-06-28 01:01:36,201 INFO L125 PetriNetUnfolderBase]: For 42122/42128 co-relation queries the response was YES. [2024-06-28 01:01:36,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18958 conditions, 3398 events. 2113/3398 cut-off events. For 42122/42128 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20162 event pairs, 387 based on Foata normal form. 8/3401 useless extension candidates. Maximal degree in co-relation 18907. Up to 2928 conditions per place. [2024-06-28 01:01:36,235 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 152 selfloop transitions, 20 changer transitions 0/185 dead transitions. [2024-06-28 01:01:36,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 185 transitions, 2212 flow [2024-06-28 01:01:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 01:01:36,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 01:01:36,238 INFO L175 Difference]: Start difference. First operand has 118 places, 154 transitions, 1794 flow. Second operand 6 states and 175 transitions. [2024-06-28 01:01:36,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 185 transitions, 2212 flow [2024-06-28 01:01:36,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 185 transitions, 2091 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:36,360 INFO L231 Difference]: Finished difference. Result has 121 places, 154 transitions, 1720 flow [2024-06-28 01:01:36,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1720, PETRI_PLACES=121, PETRI_TRANSITIONS=154} [2024-06-28 01:01:36,361 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 72 predicate places. [2024-06-28 01:01:36,361 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 154 transitions, 1720 flow [2024-06-28 01:01:36,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:36,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:36,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:36,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 01:01:36,362 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:36,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash 93638683, now seen corresponding path program 1 times [2024-06-28 01:01:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:36,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501566607] [2024-06-28 01:01:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:36,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501566607] [2024-06-28 01:01:36,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501566607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:36,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:36,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:36,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359880986] [2024-06-28 01:01:36,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:36,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:36,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:36,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:36,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:36,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:36,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 154 transitions, 1720 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:36,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:36,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:36,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:36,988 INFO L124 PetriNetUnfolderBase]: 2606/4255 cut-off events. [2024-06-28 01:01:36,989 INFO L125 PetriNetUnfolderBase]: For 60235/60235 co-relation queries the response was YES. [2024-06-28 01:01:37,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21516 conditions, 4255 events. 2606/4255 cut-off events. For 60235/60235 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26698 event pairs, 561 based on Foata normal form. 64/4283 useless extension candidates. Maximal degree in co-relation 21464. Up to 2346 conditions per place. [2024-06-28 01:01:37,024 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 115 selfloop transitions, 74 changer transitions 0/202 dead transitions. [2024-06-28 01:01:37,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 202 transitions, 2372 flow [2024-06-28 01:01:37,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-28 01:01:37,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-28 01:01:37,027 INFO L175 Difference]: Start difference. First operand has 121 places, 154 transitions, 1720 flow. Second operand 7 states and 224 transitions. [2024-06-28 01:01:37,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 202 transitions, 2372 flow [2024-06-28 01:01:37,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 202 transitions, 2324 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:37,116 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1882 flow [2024-06-28 01:01:37,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1882, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2024-06-28 01:01:37,117 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 74 predicate places. [2024-06-28 01:01:37,117 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1882 flow [2024-06-28 01:01:37,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:37,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:37,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:37,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 01:01:37,118 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:37,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:37,118 INFO L85 PathProgramCache]: Analyzing trace with hash 640839279, now seen corresponding path program 1 times [2024-06-28 01:01:37,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:37,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438114234] [2024-06-28 01:01:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:37,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:37,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:37,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438114234] [2024-06-28 01:01:37,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438114234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:37,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:37,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:37,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234943950] [2024-06-28 01:01:37,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:37,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:37,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:37,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:37,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:37,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:37,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1882 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:37,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:37,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:37,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:37,601 INFO L124 PetriNetUnfolderBase]: 2617/4199 cut-off events. [2024-06-28 01:01:37,601 INFO L125 PetriNetUnfolderBase]: For 53444/53444 co-relation queries the response was YES. [2024-06-28 01:01:37,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22804 conditions, 4199 events. 2617/4199 cut-off events. For 53444/53444 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25701 event pairs, 506 based on Foata normal form. 1/4195 useless extension candidates. Maximal degree in co-relation 22751. Up to 3794 conditions per place. [2024-06-28 01:01:37,630 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 150 selfloop transitions, 19 changer transitions 0/182 dead transitions. [2024-06-28 01:01:37,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 182 transitions, 2357 flow [2024-06-28 01:01:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-28 01:01:37,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-28 01:01:37,632 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 1882 flow. Second operand 5 states and 147 transitions. [2024-06-28 01:01:37,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 182 transitions, 2357 flow [2024-06-28 01:01:37,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 182 transitions, 2177 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:37,733 INFO L231 Difference]: Finished difference. Result has 123 places, 160 transitions, 1791 flow [2024-06-28 01:01:37,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1791, PETRI_PLACES=123, PETRI_TRANSITIONS=160} [2024-06-28 01:01:37,734 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 74 predicate places. [2024-06-28 01:01:37,734 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 160 transitions, 1791 flow [2024-06-28 01:01:37,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:37,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:37,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:37,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 01:01:37,735 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:37,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1481662437, now seen corresponding path program 2 times [2024-06-28 01:01:37,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:37,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531425476] [2024-06-28 01:01:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:37,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:37,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:37,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531425476] [2024-06-28 01:01:37,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531425476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:37,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:37,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:37,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095152540] [2024-06-28 01:01:37,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:37,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:37,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:37,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:37,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:37,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:37,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 160 transitions, 1791 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:37,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:37,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:37,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:38,393 INFO L124 PetriNetUnfolderBase]: 2739/4436 cut-off events. [2024-06-28 01:01:38,393 INFO L125 PetriNetUnfolderBase]: For 55842/55846 co-relation queries the response was YES. [2024-06-28 01:01:38,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22310 conditions, 4436 events. 2739/4436 cut-off events. For 55842/55846 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27637 event pairs, 618 based on Foata normal form. 15/4417 useless extension candidates. Maximal degree in co-relation 22256. Up to 3096 conditions per place. [2024-06-28 01:01:38,420 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 115 selfloop transitions, 75 changer transitions 0/203 dead transitions. [2024-06-28 01:01:38,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 203 transitions, 2447 flow [2024-06-28 01:01:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-28 01:01:38,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-28 01:01:38,422 INFO L175 Difference]: Start difference. First operand has 123 places, 160 transitions, 1791 flow. Second operand 7 states and 217 transitions. [2024-06-28 01:01:38,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 203 transitions, 2447 flow [2024-06-28 01:01:38,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 203 transitions, 2325 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 01:01:38,498 INFO L231 Difference]: Finished difference. Result has 126 places, 163 transitions, 1886 flow [2024-06-28 01:01:38,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1886, PETRI_PLACES=126, PETRI_TRANSITIONS=163} [2024-06-28 01:01:38,498 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 77 predicate places. [2024-06-28 01:01:38,498 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 163 transitions, 1886 flow [2024-06-28 01:01:38,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:38,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:38,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:38,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 01:01:38,499 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:38,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1253761287, now seen corresponding path program 3 times [2024-06-28 01:01:38,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:38,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793721498] [2024-06-28 01:01:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:38,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:38,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:38,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793721498] [2024-06-28 01:01:38,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793721498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:38,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:38,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:38,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253990672] [2024-06-28 01:01:38,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:38,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:38,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:38,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:38,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:38,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 163 transitions, 1886 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:38,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:38,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:38,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:39,124 INFO L124 PetriNetUnfolderBase]: 2861/4620 cut-off events. [2024-06-28 01:01:39,125 INFO L125 PetriNetUnfolderBase]: For 62369/62373 co-relation queries the response was YES. [2024-06-28 01:01:39,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24279 conditions, 4620 events. 2861/4620 cut-off events. For 62369/62373 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28985 event pairs, 614 based on Foata normal form. 15/4606 useless extension candidates. Maximal degree in co-relation 24224. Up to 3282 conditions per place. [2024-06-28 01:01:39,157 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 115 selfloop transitions, 78 changer transitions 0/206 dead transitions. [2024-06-28 01:01:39,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 206 transitions, 2560 flow [2024-06-28 01:01:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-28 01:01:39,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.692063492063492 [2024-06-28 01:01:39,158 INFO L175 Difference]: Start difference. First operand has 126 places, 163 transitions, 1886 flow. Second operand 7 states and 218 transitions. [2024-06-28 01:01:39,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 206 transitions, 2560 flow [2024-06-28 01:01:39,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 206 transitions, 2373 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:39,250 INFO L231 Difference]: Finished difference. Result has 128 places, 166 transitions, 1928 flow [2024-06-28 01:01:39,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1928, PETRI_PLACES=128, PETRI_TRANSITIONS=166} [2024-06-28 01:01:39,250 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 79 predicate places. [2024-06-28 01:01:39,250 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 166 transitions, 1928 flow [2024-06-28 01:01:39,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:39,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:39,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:39,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 01:01:39,251 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:39,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1245190407, now seen corresponding path program 4 times [2024-06-28 01:01:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:39,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045830578] [2024-06-28 01:01:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:39,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:39,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045830578] [2024-06-28 01:01:39,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045830578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:39,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:39,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:39,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891303445] [2024-06-28 01:01:39,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:39,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:39,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:39,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:39,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:39,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:39,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 166 transitions, 1928 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:39,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:39,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:39,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:39,914 INFO L124 PetriNetUnfolderBase]: 3341/5437 cut-off events. [2024-06-28 01:01:39,915 INFO L125 PetriNetUnfolderBase]: For 78346/78350 co-relation queries the response was YES. [2024-06-28 01:01:39,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27833 conditions, 5437 events. 3341/5437 cut-off events. For 78346/78350 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 35759 event pairs, 699 based on Foata normal form. 15/5422 useless extension candidates. Maximal degree in co-relation 27777. Up to 2344 conditions per place. [2024-06-28 01:01:39,954 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 120 selfloop transitions, 85 changer transitions 0/218 dead transitions. [2024-06-28 01:01:39,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 218 transitions, 2734 flow [2024-06-28 01:01:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-28 01:01:39,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-28 01:01:39,955 INFO L175 Difference]: Start difference. First operand has 128 places, 166 transitions, 1928 flow. Second operand 7 states and 224 transitions. [2024-06-28 01:01:39,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 218 transitions, 2734 flow [2024-06-28 01:01:40,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 218 transitions, 2535 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:40,058 INFO L231 Difference]: Finished difference. Result has 131 places, 171 transitions, 2028 flow [2024-06-28 01:01:40,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2028, PETRI_PLACES=131, PETRI_TRANSITIONS=171} [2024-06-28 01:01:40,058 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 82 predicate places. [2024-06-28 01:01:40,058 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 171 transitions, 2028 flow [2024-06-28 01:01:40,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:40,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:40,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:40,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 01:01:40,059 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:40,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash -805087081, now seen corresponding path program 2 times [2024-06-28 01:01:40,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:40,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409679962] [2024-06-28 01:01:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:40,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:40,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:40,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409679962] [2024-06-28 01:01:40,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409679962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:40,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:40,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:40,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512274938] [2024-06-28 01:01:40,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:40,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:40,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:40,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:40,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:40,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:40,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 171 transitions, 2028 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:40,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:40,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:40,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:40,645 INFO L124 PetriNetUnfolderBase]: 3333/5428 cut-off events. [2024-06-28 01:01:40,645 INFO L125 PetriNetUnfolderBase]: For 78360/78367 co-relation queries the response was YES. [2024-06-28 01:01:40,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28420 conditions, 5428 events. 3333/5428 cut-off events. For 78360/78367 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 35730 event pairs, 1308 based on Foata normal form. 8/5414 useless extension candidates. Maximal degree in co-relation 28362. Up to 4894 conditions per place. [2024-06-28 01:01:40,682 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 155 selfloop transitions, 18 changer transitions 0/186 dead transitions. [2024-06-28 01:01:40,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 186 transitions, 2408 flow [2024-06-28 01:01:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-06-28 01:01:40,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177777777777778 [2024-06-28 01:01:40,684 INFO L175 Difference]: Start difference. First operand has 131 places, 171 transitions, 2028 flow. Second operand 5 states and 139 transitions. [2024-06-28 01:01:40,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 186 transitions, 2408 flow [2024-06-28 01:01:40,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 186 transitions, 2190 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 01:01:40,798 INFO L231 Difference]: Finished difference. Result has 132 places, 171 transitions, 1854 flow [2024-06-28 01:01:40,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1854, PETRI_PLACES=132, PETRI_TRANSITIONS=171} [2024-06-28 01:01:40,798 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 83 predicate places. [2024-06-28 01:01:40,799 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 171 transitions, 1854 flow [2024-06-28 01:01:40,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:40,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:40,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:40,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 01:01:40,799 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:40,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1189323865, now seen corresponding path program 1 times [2024-06-28 01:01:40,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:40,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401411149] [2024-06-28 01:01:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:40,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:40,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401411149] [2024-06-28 01:01:40,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401411149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:40,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:40,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:40,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658249061] [2024-06-28 01:01:40,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:40,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:40,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:40,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:40,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:40,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:40,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 171 transitions, 1854 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:40,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:40,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:40,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:41,447 INFO L124 PetriNetUnfolderBase]: 3341/5462 cut-off events. [2024-06-28 01:01:41,447 INFO L125 PetriNetUnfolderBase]: For 75090/75090 co-relation queries the response was YES. [2024-06-28 01:01:41,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27124 conditions, 5462 events. 3341/5462 cut-off events. For 75090/75090 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36269 event pairs, 1326 based on Foata normal form. 2/5443 useless extension candidates. Maximal degree in co-relation 27065. Up to 4903 conditions per place. [2024-06-28 01:01:41,488 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 162 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-06-28 01:01:41,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 193 transitions, 2346 flow [2024-06-28 01:01:41,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-28 01:01:41,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-06-28 01:01:41,489 INFO L175 Difference]: Start difference. First operand has 132 places, 171 transitions, 1854 flow. Second operand 5 states and 143 transitions. [2024-06-28 01:01:41,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 193 transitions, 2346 flow [2024-06-28 01:01:41,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 193 transitions, 2294 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:41,595 INFO L231 Difference]: Finished difference. Result has 132 places, 174 transitions, 1886 flow [2024-06-28 01:01:41,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1886, PETRI_PLACES=132, PETRI_TRANSITIONS=174} [2024-06-28 01:01:41,595 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 83 predicate places. [2024-06-28 01:01:41,596 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 174 transitions, 1886 flow [2024-06-28 01:01:41,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:41,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:41,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:41,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 01:01:41,596 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:41,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash -805974859, now seen corresponding path program 2 times [2024-06-28 01:01:41,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:41,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118932123] [2024-06-28 01:01:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:41,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:41,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:41,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118932123] [2024-06-28 01:01:41,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118932123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:41,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:41,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:01:41,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835646018] [2024-06-28 01:01:41,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:41,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:01:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:01:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:01:41,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:41,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 174 transitions, 1886 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:41,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:41,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:41,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:42,198 INFO L124 PetriNetUnfolderBase]: 3323/5337 cut-off events. [2024-06-28 01:01:42,198 INFO L125 PetriNetUnfolderBase]: For 78160/78160 co-relation queries the response was YES. [2024-06-28 01:01:42,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27020 conditions, 5337 events. 3323/5337 cut-off events. For 78160/78160 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34686 event pairs, 770 based on Foata normal form. 1/5329 useless extension candidates. Maximal degree in co-relation 26960. Up to 4877 conditions per place. [2024-06-28 01:01:42,237 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 157 selfloop transitions, 19 changer transitions 0/189 dead transitions. [2024-06-28 01:01:42,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 189 transitions, 2272 flow [2024-06-28 01:01:42,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:01:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:01:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-28 01:01:42,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 01:01:42,239 INFO L175 Difference]: Start difference. First operand has 132 places, 174 transitions, 1886 flow. Second operand 5 states and 140 transitions. [2024-06-28 01:01:42,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 189 transitions, 2272 flow [2024-06-28 01:01:42,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 2241 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:42,355 INFO L231 Difference]: Finished difference. Result has 135 places, 174 transitions, 1899 flow [2024-06-28 01:01:42,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1899, PETRI_PLACES=135, PETRI_TRANSITIONS=174} [2024-06-28 01:01:42,356 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2024-06-28 01:01:42,356 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 174 transitions, 1899 flow [2024-06-28 01:01:42,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:42,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:42,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:42,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 01:01:42,357 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:42,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:42,358 INFO L85 PathProgramCache]: Analyzing trace with hash -765517007, now seen corresponding path program 1 times [2024-06-28 01:01:42,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:42,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092788234] [2024-06-28 01:01:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:42,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:42,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:42,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092788234] [2024-06-28 01:01:42,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092788234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:42,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:42,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:42,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703962513] [2024-06-28 01:01:42,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:42,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:42,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:42,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:42,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 174 transitions, 1899 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:42,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:42,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:42,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:43,275 INFO L124 PetriNetUnfolderBase]: 4555/7359 cut-off events. [2024-06-28 01:01:43,275 INFO L125 PetriNetUnfolderBase]: For 146105/146105 co-relation queries the response was YES. [2024-06-28 01:01:43,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37750 conditions, 7359 events. 4555/7359 cut-off events. For 146105/146105 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 51348 event pairs, 778 based on Foata normal form. 48/7329 useless extension candidates. Maximal degree in co-relation 37689. Up to 2673 conditions per place. [2024-06-28 01:01:43,335 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 155 selfloop transitions, 76 changer transitions 0/244 dead transitions. [2024-06-28 01:01:43,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 244 transitions, 2995 flow [2024-06-28 01:01:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 234 transitions. [2024-06-28 01:01:43,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7428571428571429 [2024-06-28 01:01:43,337 INFO L175 Difference]: Start difference. First operand has 135 places, 174 transitions, 1899 flow. Second operand 7 states and 234 transitions. [2024-06-28 01:01:43,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 244 transitions, 2995 flow [2024-06-28 01:01:43,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 244 transitions, 2926 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 01:01:43,544 INFO L231 Difference]: Finished difference. Result has 138 places, 182 transitions, 2191 flow [2024-06-28 01:01:43,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2191, PETRI_PLACES=138, PETRI_TRANSITIONS=182} [2024-06-28 01:01:43,545 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 89 predicate places. [2024-06-28 01:01:43,545 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 182 transitions, 2191 flow [2024-06-28 01:01:43,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:43,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:43,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:43,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 01:01:43,546 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:43,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash -763643057, now seen corresponding path program 2 times [2024-06-28 01:01:43,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:43,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182886698] [2024-06-28 01:01:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:43,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:43,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:43,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182886698] [2024-06-28 01:01:43,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182886698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:43,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:43,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:43,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302662447] [2024-06-28 01:01:43,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:43,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:43,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:43,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:43,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:43,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:43,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 182 transitions, 2191 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:43,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:43,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:43,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:44,575 INFO L124 PetriNetUnfolderBase]: 5143/8317 cut-off events. [2024-06-28 01:01:44,576 INFO L125 PetriNetUnfolderBase]: For 180322/180322 co-relation queries the response was YES. [2024-06-28 01:01:44,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44915 conditions, 8317 events. 5143/8317 cut-off events. For 180322/180322 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 59456 event pairs, 1242 based on Foata normal form. 48/8307 useless extension candidates. Maximal degree in co-relation 44852. Up to 5357 conditions per place. [2024-06-28 01:01:44,639 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 147 selfloop transitions, 80 changer transitions 0/240 dead transitions. [2024-06-28 01:01:44,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 240 transitions, 3141 flow [2024-06-28 01:01:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-06-28 01:01:44,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.726984126984127 [2024-06-28 01:01:44,640 INFO L175 Difference]: Start difference. First operand has 138 places, 182 transitions, 2191 flow. Second operand 7 states and 229 transitions. [2024-06-28 01:01:44,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 240 transitions, 3141 flow [2024-06-28 01:01:44,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 240 transitions, 2986 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:44,884 INFO L231 Difference]: Finished difference. Result has 144 places, 188 transitions, 2361 flow [2024-06-28 01:01:44,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2036, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2361, PETRI_PLACES=144, PETRI_TRANSITIONS=188} [2024-06-28 01:01:44,885 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 95 predicate places. [2024-06-28 01:01:44,885 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 188 transitions, 2361 flow [2024-06-28 01:01:44,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:44,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:44,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:44,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 01:01:44,886 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:44,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:44,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1609115909, now seen corresponding path program 1 times [2024-06-28 01:01:44,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:44,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117086185] [2024-06-28 01:01:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:44,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:44,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:44,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117086185] [2024-06-28 01:01:44,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117086185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:44,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:44,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:44,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608877030] [2024-06-28 01:01:44,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:44,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:44,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:44,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:44,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:44,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:44,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 188 transitions, 2361 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:44,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:44,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:44,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:45,844 INFO L124 PetriNetUnfolderBase]: 5176/8405 cut-off events. [2024-06-28 01:01:45,844 INFO L125 PetriNetUnfolderBase]: For 171383/171383 co-relation queries the response was YES. [2024-06-28 01:01:45,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46177 conditions, 8405 events. 5176/8405 cut-off events. For 171383/171383 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 60534 event pairs, 1479 based on Foata normal form. 3/8378 useless extension candidates. Maximal degree in co-relation 46111. Up to 6966 conditions per place. [2024-06-28 01:01:45,915 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 129 selfloop transitions, 84 changer transitions 0/226 dead transitions. [2024-06-28 01:01:45,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 226 transitions, 3121 flow [2024-06-28 01:01:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-28 01:01:45,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-06-28 01:01:45,917 INFO L175 Difference]: Start difference. First operand has 144 places, 188 transitions, 2361 flow. Second operand 6 states and 190 transitions. [2024-06-28 01:01:45,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 226 transitions, 3121 flow [2024-06-28 01:01:46,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 226 transitions, 2940 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:46,295 INFO L231 Difference]: Finished difference. Result has 147 places, 193 transitions, 2443 flow [2024-06-28 01:01:46,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2443, PETRI_PLACES=147, PETRI_TRANSITIONS=193} [2024-06-28 01:01:46,295 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 98 predicate places. [2024-06-28 01:01:46,295 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 193 transitions, 2443 flow [2024-06-28 01:01:46,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:46,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:46,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:46,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 01:01:46,296 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:46,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:46,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1397892273, now seen corresponding path program 3 times [2024-06-28 01:01:46,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:46,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521740918] [2024-06-28 01:01:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:46,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:46,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:46,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521740918] [2024-06-28 01:01:46,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521740918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:46,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:46,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:46,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164097674] [2024-06-28 01:01:46,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:46,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:46,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:46,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:46,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:46,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 193 transitions, 2443 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:46,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:46,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:46,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:47,556 INFO L124 PetriNetUnfolderBase]: 5948/9805 cut-off events. [2024-06-28 01:01:47,557 INFO L125 PetriNetUnfolderBase]: For 222269/222269 co-relation queries the response was YES. [2024-06-28 01:01:47,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52739 conditions, 9805 events. 5948/9805 cut-off events. For 222269/222269 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 74179 event pairs, 1483 based on Foata normal form. 42/9810 useless extension candidates. Maximal degree in co-relation 52671. Up to 6575 conditions per place. [2024-06-28 01:01:47,646 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 156 selfloop transitions, 86 changer transitions 0/255 dead transitions. [2024-06-28 01:01:47,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 255 transitions, 3517 flow [2024-06-28 01:01:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 232 transitions. [2024-06-28 01:01:47,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7365079365079366 [2024-06-28 01:01:47,647 INFO L175 Difference]: Start difference. First operand has 147 places, 193 transitions, 2443 flow. Second operand 7 states and 232 transitions. [2024-06-28 01:01:47,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 255 transitions, 3517 flow [2024-06-28 01:01:48,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 255 transitions, 3376 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:48,012 INFO L231 Difference]: Finished difference. Result has 152 places, 198 transitions, 2627 flow [2024-06-28 01:01:48,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2302, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2627, PETRI_PLACES=152, PETRI_TRANSITIONS=198} [2024-06-28 01:01:48,013 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 103 predicate places. [2024-06-28 01:01:48,013 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 198 transitions, 2627 flow [2024-06-28 01:01:48,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:48,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:48,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:48,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 01:01:48,014 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:48,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:48,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1848593555, now seen corresponding path program 4 times [2024-06-28 01:01:48,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:48,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310920028] [2024-06-28 01:01:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:48,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:48,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:48,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310920028] [2024-06-28 01:01:48,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310920028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:48,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:48,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:48,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869243009] [2024-06-28 01:01:48,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:48,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:48,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:48,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:48,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:48,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:48,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 198 transitions, 2627 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:48,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:48,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:48,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:49,510 INFO L124 PetriNetUnfolderBase]: 6319/10406 cut-off events. [2024-06-28 01:01:49,510 INFO L125 PetriNetUnfolderBase]: For 250533/250533 co-relation queries the response was YES. [2024-06-28 01:01:49,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56545 conditions, 10406 events. 6319/10406 cut-off events. For 250533/250533 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 79535 event pairs, 1975 based on Foata normal form. 50/10417 useless extension candidates. Maximal degree in co-relation 56475. Up to 8227 conditions per place. [2024-06-28 01:01:49,590 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 150 selfloop transitions, 81 changer transitions 0/244 dead transitions. [2024-06-28 01:01:49,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 244 transitions, 3391 flow [2024-06-28 01:01:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-28 01:01:49,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6984126984126984 [2024-06-28 01:01:49,591 INFO L175 Difference]: Start difference. First operand has 152 places, 198 transitions, 2627 flow. Second operand 7 states and 220 transitions. [2024-06-28 01:01:49,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 244 transitions, 3391 flow [2024-06-28 01:01:50,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 244 transitions, 3214 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:50,033 INFO L231 Difference]: Finished difference. Result has 156 places, 200 transitions, 2691 flow [2024-06-28 01:01:50,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2691, PETRI_PLACES=156, PETRI_TRANSITIONS=200} [2024-06-28 01:01:50,033 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 107 predicate places. [2024-06-28 01:01:50,034 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 200 transitions, 2691 flow [2024-06-28 01:01:50,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:50,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:50,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:50,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 01:01:50,034 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:50,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1397888553, now seen corresponding path program 5 times [2024-06-28 01:01:50,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:50,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221293573] [2024-06-28 01:01:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:50,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:50,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:50,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221293573] [2024-06-28 01:01:50,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221293573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:50,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:50,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:50,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223052368] [2024-06-28 01:01:50,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:50,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:50,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:50,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:50,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 200 transitions, 2691 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:50,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:50,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:50,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:51,297 INFO L124 PetriNetUnfolderBase]: 6690/10981 cut-off events. [2024-06-28 01:01:51,297 INFO L125 PetriNetUnfolderBase]: For 266944/266944 co-relation queries the response was YES. [2024-06-28 01:01:51,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59332 conditions, 10981 events. 6690/10981 cut-off events. For 266944/266944 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 84336 event pairs, 2101 based on Foata normal form. 50/10994 useless extension candidates. Maximal degree in co-relation 59260. Up to 8824 conditions per place. [2024-06-28 01:01:51,397 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 152 selfloop transitions, 85 changer transitions 0/250 dead transitions. [2024-06-28 01:01:51,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 250 transitions, 3547 flow [2024-06-28 01:01:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-28 01:01:51,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-06-28 01:01:51,398 INFO L175 Difference]: Start difference. First operand has 156 places, 200 transitions, 2691 flow. Second operand 7 states and 225 transitions. [2024-06-28 01:01:51,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 250 transitions, 3547 flow [2024-06-28 01:01:52,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 250 transitions, 3342 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:52,137 INFO L231 Difference]: Finished difference. Result has 158 places, 202 transitions, 2737 flow [2024-06-28 01:01:52,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2737, PETRI_PLACES=158, PETRI_TRANSITIONS=202} [2024-06-28 01:01:52,137 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 109 predicate places. [2024-06-28 01:01:52,138 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 202 transitions, 2737 flow [2024-06-28 01:01:52,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:52,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:52,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:52,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 01:01:52,138 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:52,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:52,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1392166821, now seen corresponding path program 1 times [2024-06-28 01:01:52,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:52,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792729299] [2024-06-28 01:01:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:52,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:52,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:52,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792729299] [2024-06-28 01:01:52,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792729299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:52,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:52,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:52,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462224070] [2024-06-28 01:01:52,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:52,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:52,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:52,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:52,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 202 transitions, 2737 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:52,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:52,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:52,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:53,637 INFO L124 PetriNetUnfolderBase]: 6992/11531 cut-off events. [2024-06-28 01:01:53,637 INFO L125 PetriNetUnfolderBase]: For 282900/282900 co-relation queries the response was YES. [2024-06-28 01:01:53,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61306 conditions, 11531 events. 6992/11531 cut-off events. For 282900/282900 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 90063 event pairs, 1965 based on Foata normal form. 42/11509 useless extension candidates. Maximal degree in co-relation 61233. Up to 7370 conditions per place. [2024-06-28 01:01:53,755 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 152 selfloop transitions, 89 changer transitions 0/254 dead transitions. [2024-06-28 01:01:53,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 254 transitions, 3554 flow [2024-06-28 01:01:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-28 01:01:53,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-28 01:01:53,757 INFO L175 Difference]: Start difference. First operand has 158 places, 202 transitions, 2737 flow. Second operand 7 states and 224 transitions. [2024-06-28 01:01:53,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 254 transitions, 3554 flow [2024-06-28 01:01:54,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 254 transitions, 3337 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:54,198 INFO L231 Difference]: Finished difference. Result has 160 places, 204 transitions, 2779 flow [2024-06-28 01:01:54,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2779, PETRI_PLACES=160, PETRI_TRANSITIONS=204} [2024-06-28 01:01:54,198 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 111 predicate places. [2024-06-28 01:01:54,199 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 204 transitions, 2779 flow [2024-06-28 01:01:54,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:54,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:54,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:54,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 01:01:54,199 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:54,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash 934190201, now seen corresponding path program 2 times [2024-06-28 01:01:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:54,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990952803] [2024-06-28 01:01:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:54,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:54,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990952803] [2024-06-28 01:01:54,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990952803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:54,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:54,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:01:54,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954679680] [2024-06-28 01:01:54,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:54,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:01:54,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:54,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:01:54,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:01:54,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:54,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 204 transitions, 2779 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:54,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:54,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:54,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:55,599 INFO L124 PetriNetUnfolderBase]: 7085/11667 cut-off events. [2024-06-28 01:01:55,599 INFO L125 PetriNetUnfolderBase]: For 267724/267724 co-relation queries the response was YES. [2024-06-28 01:01:55,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62477 conditions, 11667 events. 7085/11667 cut-off events. For 267724/267724 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 90686 event pairs, 2280 based on Foata normal form. 3/11627 useless extension candidates. Maximal degree in co-relation 62403. Up to 9911 conditions per place. [2024-06-28 01:01:55,712 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 140 selfloop transitions, 91 changer transitions 0/244 dead transitions. [2024-06-28 01:01:55,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 244 transitions, 3736 flow [2024-06-28 01:01:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:01:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:01:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-28 01:01:55,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-28 01:01:55,713 INFO L175 Difference]: Start difference. First operand has 160 places, 204 transitions, 2779 flow. Second operand 6 states and 183 transitions. [2024-06-28 01:01:55,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 244 transitions, 3736 flow [2024-06-28 01:01:56,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 244 transitions, 3486 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:56,290 INFO L231 Difference]: Finished difference. Result has 162 places, 217 transitions, 2988 flow [2024-06-28 01:01:56,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2549, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2988, PETRI_PLACES=162, PETRI_TRANSITIONS=217} [2024-06-28 01:01:56,291 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2024-06-28 01:01:56,291 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 217 transitions, 2988 flow [2024-06-28 01:01:56,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:56,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:56,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:56,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 01:01:56,292 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:56,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:56,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1923827453, now seen corresponding path program 6 times [2024-06-28 01:01:56,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:56,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058405271] [2024-06-28 01:01:56,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:56,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:56,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:56,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058405271] [2024-06-28 01:01:56,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058405271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:56,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:56,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:56,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8094514] [2024-06-28 01:01:56,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:56,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:56,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:56,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:56,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 217 transitions, 2988 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:56,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:56,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:56,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:57,868 INFO L124 PetriNetUnfolderBase]: 7324/12055 cut-off events. [2024-06-28 01:01:57,868 INFO L125 PetriNetUnfolderBase]: For 295906/295916 co-relation queries the response was YES. [2024-06-28 01:01:57,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62749 conditions, 12055 events. 7324/12055 cut-off events. For 295906/295916 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 94273 event pairs, 2407 based on Foata normal form. 55/12068 useless extension candidates. Maximal degree in co-relation 62673. Up to 9744 conditions per place. [2024-06-28 01:01:57,990 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 169 selfloop transitions, 78 changer transitions 0/260 dead transitions. [2024-06-28 01:01:57,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 260 transitions, 3800 flow [2024-06-28 01:01:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-28 01:01:57,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-06-28 01:01:57,991 INFO L175 Difference]: Start difference. First operand has 162 places, 217 transitions, 2988 flow. Second operand 7 states and 215 transitions. [2024-06-28 01:01:57,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 260 transitions, 3800 flow [2024-06-28 01:01:58,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 260 transitions, 3683 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-28 01:01:58,557 INFO L231 Difference]: Finished difference. Result has 167 places, 219 transitions, 3114 flow [2024-06-28 01:01:58,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3114, PETRI_PLACES=167, PETRI_TRANSITIONS=219} [2024-06-28 01:01:58,558 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 118 predicate places. [2024-06-28 01:01:58,558 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 219 transitions, 3114 flow [2024-06-28 01:01:58,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:58,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:58,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:58,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 01:01:58,558 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:58,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1924042655, now seen corresponding path program 2 times [2024-06-28 01:01:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:58,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840378986] [2024-06-28 01:01:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:58,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:58,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:58,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840378986] [2024-06-28 01:01:58,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840378986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:58,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:58,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:01:58,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31460611] [2024-06-28 01:01:58,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:58,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:01:58,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:58,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:01:58,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:01:58,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:01:58,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 219 transitions, 3114 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:58,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:58,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:01:58,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:00,416 INFO L124 PetriNetUnfolderBase]: 7532/12437 cut-off events. [2024-06-28 01:02:00,416 INFO L125 PetriNetUnfolderBase]: For 303798/303808 co-relation queries the response was YES. [2024-06-28 01:02:00,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63946 conditions, 12437 events. 7532/12437 cut-off events. For 303798/303808 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 98332 event pairs, 2372 based on Foata normal form. 47/12442 useless extension candidates. Maximal degree in co-relation 63869. Up to 9465 conditions per place. [2024-06-28 01:02:00,511 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 173 selfloop transitions, 82 changer transitions 0/268 dead transitions. [2024-06-28 01:02:00,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 3969 flow [2024-06-28 01:02:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:00,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:00,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-28 01:02:00,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6984126984126984 [2024-06-28 01:02:00,512 INFO L175 Difference]: Start difference. First operand has 167 places, 219 transitions, 3114 flow. Second operand 7 states and 220 transitions. [2024-06-28 01:02:00,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 3969 flow [2024-06-28 01:02:01,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 268 transitions, 3760 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:01,047 INFO L231 Difference]: Finished difference. Result has 169 places, 221 transitions, 3155 flow [2024-06-28 01:02:01,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3155, PETRI_PLACES=169, PETRI_TRANSITIONS=221} [2024-06-28 01:02:01,047 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 120 predicate places. [2024-06-28 01:02:01,047 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 221 transitions, 3155 flow [2024-06-28 01:02:01,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:01,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:01,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:01,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 01:02:01,048 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:01,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:01,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2105227361, now seen corresponding path program 3 times [2024-06-28 01:02:01,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:01,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552110239] [2024-06-28 01:02:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:01,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:01,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:01,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552110239] [2024-06-28 01:02:01,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552110239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:01,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:01,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:01,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804495710] [2024-06-28 01:02:01,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:01,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:01,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:01,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:01,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:01,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:01,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 221 transitions, 3155 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:01,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:01,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:01,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:02,687 INFO L124 PetriNetUnfolderBase]: 7969/13191 cut-off events. [2024-06-28 01:02:02,687 INFO L125 PetriNetUnfolderBase]: For 323030/323040 co-relation queries the response was YES. [2024-06-28 01:02:02,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66036 conditions, 13191 events. 7969/13191 cut-off events. For 323030/323040 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 104971 event pairs, 2396 based on Foata normal form. 47/13196 useless extension candidates. Maximal degree in co-relation 65958. Up to 5706 conditions per place. [2024-06-28 01:02:02,802 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 173 selfloop transitions, 87 changer transitions 0/273 dead transitions. [2024-06-28 01:02:02,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 273 transitions, 3997 flow [2024-06-28 01:02:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-28 01:02:02,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7047619047619048 [2024-06-28 01:02:02,803 INFO L175 Difference]: Start difference. First operand has 169 places, 221 transitions, 3155 flow. Second operand 7 states and 222 transitions. [2024-06-28 01:02:02,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 273 transitions, 3997 flow [2024-06-28 01:02:03,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 273 transitions, 3774 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:03,411 INFO L231 Difference]: Finished difference. Result has 170 places, 221 transitions, 3071 flow [2024-06-28 01:02:03,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3071, PETRI_PLACES=170, PETRI_TRANSITIONS=221} [2024-06-28 01:02:03,412 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 121 predicate places. [2024-06-28 01:02:03,412 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 221 transitions, 3071 flow [2024-06-28 01:02:03,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:03,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:03,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:03,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 01:02:03,413 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:03,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:03,413 INFO L85 PathProgramCache]: Analyzing trace with hash 812105717, now seen corresponding path program 3 times [2024-06-28 01:02:03,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:03,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141753483] [2024-06-28 01:02:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:03,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:03,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:03,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141753483] [2024-06-28 01:02:03,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141753483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:03,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:03,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:03,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301328258] [2024-06-28 01:02:03,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:03,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:03,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:03,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:03,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:03,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:03,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 221 transitions, 3071 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:03,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:03,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:03,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:04,908 INFO L124 PetriNetUnfolderBase]: 7959/13183 cut-off events. [2024-06-28 01:02:04,908 INFO L125 PetriNetUnfolderBase]: For 297268/297272 co-relation queries the response was YES. [2024-06-28 01:02:04,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65656 conditions, 13183 events. 7959/13183 cut-off events. For 297268/297272 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 105751 event pairs, 2759 based on Foata normal form. 7/13150 useless extension candidates. Maximal degree in co-relation 65577. Up to 11332 conditions per place. [2024-06-28 01:02:05,037 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 143 selfloop transitions, 86 changer transitions 0/242 dead transitions. [2024-06-28 01:02:05,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 242 transitions, 3803 flow [2024-06-28 01:02:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 01:02:05,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-28 01:02:05,039 INFO L175 Difference]: Start difference. First operand has 170 places, 221 transitions, 3071 flow. Second operand 6 states and 178 transitions. [2024-06-28 01:02:05,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 242 transitions, 3803 flow [2024-06-28 01:02:05,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 242 transitions, 3564 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:05,682 INFO L231 Difference]: Finished difference. Result has 171 places, 221 transitions, 3015 flow [2024-06-28 01:02:05,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3015, PETRI_PLACES=171, PETRI_TRANSITIONS=221} [2024-06-28 01:02:05,683 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 122 predicate places. [2024-06-28 01:02:05,683 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 221 transitions, 3015 flow [2024-06-28 01:02:05,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:05,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:05,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:05,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 01:02:05,683 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:05,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash -323932765, now seen corresponding path program 1 times [2024-06-28 01:02:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:05,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865827157] [2024-06-28 01:02:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:05,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:05,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865827157] [2024-06-28 01:02:05,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865827157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:05,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:05,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:05,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616940409] [2024-06-28 01:02:05,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:05,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:05,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:05,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:05,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:05,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:05,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 221 transitions, 3015 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:05,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:05,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:05,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:07,391 INFO L124 PetriNetUnfolderBase]: 7818/12949 cut-off events. [2024-06-28 01:02:07,391 INFO L125 PetriNetUnfolderBase]: For 287632/287634 co-relation queries the response was YES. [2024-06-28 01:02:07,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64289 conditions, 12949 events. 7818/12949 cut-off events. For 287632/287634 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 103427 event pairs, 2685 based on Foata normal form. 6/12910 useless extension candidates. Maximal degree in co-relation 64209. Up to 11000 conditions per place. [2024-06-28 01:02:07,513 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 150 selfloop transitions, 95 changer transitions 0/258 dead transitions. [2024-06-28 01:02:07,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 258 transitions, 4028 flow [2024-06-28 01:02:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-28 01:02:07,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-28 01:02:07,515 INFO L175 Difference]: Start difference. First operand has 171 places, 221 transitions, 3015 flow. Second operand 6 states and 181 transitions. [2024-06-28 01:02:07,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 258 transitions, 4028 flow [2024-06-28 01:02:08,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 258 transitions, 3540 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-28 01:02:08,141 INFO L231 Difference]: Finished difference. Result has 169 places, 234 transitions, 3001 flow [2024-06-28 01:02:08,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3001, PETRI_PLACES=169, PETRI_TRANSITIONS=234} [2024-06-28 01:02:08,141 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 120 predicate places. [2024-06-28 01:02:08,141 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 234 transitions, 3001 flow [2024-06-28 01:02:08,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:08,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:08,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:08,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 01:02:08,142 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:08,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash 817652981, now seen corresponding path program 2 times [2024-06-28 01:02:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:08,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356603947] [2024-06-28 01:02:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:08,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:08,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356603947] [2024-06-28 01:02:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356603947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:08,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:08,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:08,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500347418] [2024-06-28 01:02:08,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:08,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:08,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:08,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:08,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:08,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 234 transitions, 3001 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:08,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:08,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:08,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:09,583 INFO L124 PetriNetUnfolderBase]: 7855/12971 cut-off events. [2024-06-28 01:02:09,584 INFO L125 PetriNetUnfolderBase]: For 286248/286250 co-relation queries the response was YES. [2024-06-28 01:02:09,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64319 conditions, 12971 events. 7855/12971 cut-off events. For 286248/286250 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 103176 event pairs, 2708 based on Foata normal form. 3/12934 useless extension candidates. Maximal degree in co-relation 64240. Up to 11019 conditions per place. [2024-06-28 01:02:09,710 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 146 selfloop transitions, 101 changer transitions 0/260 dead transitions. [2024-06-28 01:02:09,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 260 transitions, 3864 flow [2024-06-28 01:02:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 01:02:09,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-28 01:02:09,711 INFO L175 Difference]: Start difference. First operand has 169 places, 234 transitions, 3001 flow. Second operand 6 states and 176 transitions. [2024-06-28 01:02:09,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 260 transitions, 3864 flow [2024-06-28 01:02:10,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 260 transitions, 3735 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:10,303 INFO L231 Difference]: Finished difference. Result has 173 places, 239 transitions, 3170 flow [2024-06-28 01:02:10,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2875, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3170, PETRI_PLACES=173, PETRI_TRANSITIONS=239} [2024-06-28 01:02:10,304 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 124 predicate places. [2024-06-28 01:02:10,304 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 239 transitions, 3170 flow [2024-06-28 01:02:10,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:10,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:10,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:10,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 01:02:10,304 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:10,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1288875275, now seen corresponding path program 3 times [2024-06-28 01:02:10,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:10,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379427263] [2024-06-28 01:02:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:10,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:10,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379427263] [2024-06-28 01:02:10,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379427263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:10,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:10,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:10,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970734042] [2024-06-28 01:02:10,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:10,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:10,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:10,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:10,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 239 transitions, 3170 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:10,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:10,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:10,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:11,926 INFO L124 PetriNetUnfolderBase]: 7848/12962 cut-off events. [2024-06-28 01:02:11,926 INFO L125 PetriNetUnfolderBase]: For 297295/297297 co-relation queries the response was YES. [2024-06-28 01:02:11,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64507 conditions, 12962 events. 7848/12962 cut-off events. For 297295/297297 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 103144 event pairs, 2715 based on Foata normal form. 3/12925 useless extension candidates. Maximal degree in co-relation 64427. Up to 11017 conditions per place. [2024-06-28 01:02:12,045 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 143 selfloop transitions, 104 changer transitions 0/260 dead transitions. [2024-06-28 01:02:12,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 260 transitions, 3956 flow [2024-06-28 01:02:12,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:12,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-28 01:02:12,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-28 01:02:12,047 INFO L175 Difference]: Start difference. First operand has 173 places, 239 transitions, 3170 flow. Second operand 6 states and 177 transitions. [2024-06-28 01:02:12,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 260 transitions, 3956 flow [2024-06-28 01:02:12,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 260 transitions, 3664 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:12,679 INFO L231 Difference]: Finished difference. Result has 173 places, 239 transitions, 3095 flow [2024-06-28 01:02:12,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3095, PETRI_PLACES=173, PETRI_TRANSITIONS=239} [2024-06-28 01:02:12,683 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 124 predicate places. [2024-06-28 01:02:12,683 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 239 transitions, 3095 flow [2024-06-28 01:02:12,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:12,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:12,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:12,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 01:02:12,684 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:12,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1288884203, now seen corresponding path program 1 times [2024-06-28 01:02:12,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:12,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006238512] [2024-06-28 01:02:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:12,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:12,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:12,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006238512] [2024-06-28 01:02:12,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006238512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:12,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:12,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:12,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382553016] [2024-06-28 01:02:12,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:12,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:12,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:12,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:12,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:12,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:12,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 239 transitions, 3095 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:12,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:12,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:12,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:14,277 INFO L124 PetriNetUnfolderBase]: 7861/12983 cut-off events. [2024-06-28 01:02:14,277 INFO L125 PetriNetUnfolderBase]: For 307757/307762 co-relation queries the response was YES. [2024-06-28 01:02:14,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64566 conditions, 12983 events. 7861/12983 cut-off events. For 307757/307762 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 103209 event pairs, 4177 based on Foata normal form. 8/12958 useless extension candidates. Maximal degree in co-relation 64487. Up to 12000 conditions per place. [2024-06-28 01:02:14,394 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 226 selfloop transitions, 22 changer transitions 0/261 dead transitions. [2024-06-28 01:02:14,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 261 transitions, 3683 flow [2024-06-28 01:02:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-28 01:02:14,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 01:02:14,396 INFO L175 Difference]: Start difference. First operand has 173 places, 239 transitions, 3095 flow. Second operand 6 states and 162 transitions. [2024-06-28 01:02:14,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 261 transitions, 3683 flow [2024-06-28 01:02:15,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 261 transitions, 3404 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:15,014 INFO L231 Difference]: Finished difference. Result has 173 places, 242 transitions, 2922 flow [2024-06-28 01:02:15,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2816, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2922, PETRI_PLACES=173, PETRI_TRANSITIONS=242} [2024-06-28 01:02:15,015 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 124 predicate places. [2024-06-28 01:02:15,015 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 242 transitions, 2922 flow [2024-06-28 01:02:15,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:15,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:15,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:15,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 01:02:15,015 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:15,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:15,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1208023541, now seen corresponding path program 1 times [2024-06-28 01:02:15,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:15,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052773034] [2024-06-28 01:02:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:15,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:15,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:15,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052773034] [2024-06-28 01:02:15,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052773034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:15,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:15,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:15,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311463504] [2024-06-28 01:02:15,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:15,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:15,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:15,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:15,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:15,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:15,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 242 transitions, 2922 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:15,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:15,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:15,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:16,594 INFO L124 PetriNetUnfolderBase]: 7894/13062 cut-off events. [2024-06-28 01:02:16,594 INFO L125 PetriNetUnfolderBase]: For 316640/316645 co-relation queries the response was YES. [2024-06-28 01:02:16,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64545 conditions, 13062 events. 7894/13062 cut-off events. For 316640/316645 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 104187 event pairs, 2683 based on Foata normal form. 7/13013 useless extension candidates. Maximal degree in co-relation 64467. Up to 11064 conditions per place. [2024-06-28 01:02:16,714 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 170 selfloop transitions, 90 changer transitions 0/273 dead transitions. [2024-06-28 01:02:16,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 273 transitions, 3749 flow [2024-06-28 01:02:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 01:02:16,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-28 01:02:16,716 INFO L175 Difference]: Start difference. First operand has 173 places, 242 transitions, 2922 flow. Second operand 6 states and 179 transitions. [2024-06-28 01:02:16,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 273 transitions, 3749 flow [2024-06-28 01:02:17,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 273 transitions, 3665 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:17,411 INFO L231 Difference]: Finished difference. Result has 175 places, 247 transitions, 3103 flow [2024-06-28 01:02:17,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3103, PETRI_PLACES=175, PETRI_TRANSITIONS=247} [2024-06-28 01:02:17,411 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 126 predicate places. [2024-06-28 01:02:17,411 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 247 transitions, 3103 flow [2024-06-28 01:02:17,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:17,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:17,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:17,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 01:02:17,412 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:17,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:17,413 INFO L85 PathProgramCache]: Analyzing trace with hash 688919670, now seen corresponding path program 1 times [2024-06-28 01:02:17,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:17,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612011638] [2024-06-28 01:02:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:17,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:17,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:17,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612011638] [2024-06-28 01:02:17,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612011638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:17,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461080761] [2024-06-28 01:02:17,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:17,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:17,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:17,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:17,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:17,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:17,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 247 transitions, 3103 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:17,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:17,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:17,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:18,779 INFO L124 PetriNetUnfolderBase]: 7878/13042 cut-off events. [2024-06-28 01:02:18,779 INFO L125 PetriNetUnfolderBase]: For 328810/328810 co-relation queries the response was YES. [2024-06-28 01:02:18,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65056 conditions, 13042 events. 7878/13042 cut-off events. For 328810/328810 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 104051 event pairs, 2616 based on Foata normal form. 4/12993 useless extension candidates. Maximal degree in co-relation 64977. Up to 11055 conditions per place. [2024-06-28 01:02:18,901 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 163 selfloop transitions, 101 changer transitions 0/277 dead transitions. [2024-06-28 01:02:18,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 277 transitions, 3965 flow [2024-06-28 01:02:18,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-28 01:02:18,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-28 01:02:18,908 INFO L175 Difference]: Start difference. First operand has 175 places, 247 transitions, 3103 flow. Second operand 6 states and 186 transitions. [2024-06-28 01:02:18,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 277 transitions, 3965 flow [2024-06-28 01:02:19,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 277 transitions, 3767 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:19,585 INFO L231 Difference]: Finished difference. Result has 177 places, 247 transitions, 3116 flow [2024-06-28 01:02:19,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3116, PETRI_PLACES=177, PETRI_TRANSITIONS=247} [2024-06-28 01:02:19,585 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 128 predicate places. [2024-06-28 01:02:19,585 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 247 transitions, 3116 flow [2024-06-28 01:02:19,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:19,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:19,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:19,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 01:02:19,586 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:19,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:19,587 INFO L85 PathProgramCache]: Analyzing trace with hash -104760580, now seen corresponding path program 2 times [2024-06-28 01:02:19,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:19,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287610979] [2024-06-28 01:02:19,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:19,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:19,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:19,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287610979] [2024-06-28 01:02:19,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287610979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:19,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:19,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:19,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730870548] [2024-06-28 01:02:19,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:19,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:19,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:19,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:19,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:19,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:19,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 247 transitions, 3116 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:19,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:19,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:19,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:21,012 INFO L124 PetriNetUnfolderBase]: 7872/12986 cut-off events. [2024-06-28 01:02:21,012 INFO L125 PetriNetUnfolderBase]: For 335982/335982 co-relation queries the response was YES. [2024-06-28 01:02:21,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65273 conditions, 12986 events. 7872/12986 cut-off events. For 335982/335982 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 103381 event pairs, 2588 based on Foata normal form. 2/12949 useless extension candidates. Maximal degree in co-relation 65194. Up to 11054 conditions per place. [2024-06-28 01:02:21,134 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 156 selfloop transitions, 105 changer transitions 0/274 dead transitions. [2024-06-28 01:02:21,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 274 transitions, 3970 flow [2024-06-28 01:02:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-28 01:02:21,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-28 01:02:21,135 INFO L175 Difference]: Start difference. First operand has 177 places, 247 transitions, 3116 flow. Second operand 6 states and 181 transitions. [2024-06-28 01:02:21,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 274 transitions, 3970 flow [2024-06-28 01:02:21,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 274 transitions, 3795 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 01:02:21,818 INFO L231 Difference]: Finished difference. Result has 180 places, 247 transitions, 3160 flow [2024-06-28 01:02:21,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3160, PETRI_PLACES=180, PETRI_TRANSITIONS=247} [2024-06-28 01:02:21,819 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 131 predicate places. [2024-06-28 01:02:21,819 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 247 transitions, 3160 flow [2024-06-28 01:02:21,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:21,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:21,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:21,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 01:02:21,820 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:21,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash 822133313, now seen corresponding path program 2 times [2024-06-28 01:02:21,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:21,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77047687] [2024-06-28 01:02:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:21,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:21,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:21,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77047687] [2024-06-28 01:02:21,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77047687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:21,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:21,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:21,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413986034] [2024-06-28 01:02:21,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:21,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:21,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:21,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:21,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:21,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 247 transitions, 3160 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:21,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:21,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:21,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:23,227 INFO L124 PetriNetUnfolderBase]: 7909/13062 cut-off events. [2024-06-28 01:02:23,227 INFO L125 PetriNetUnfolderBase]: For 351825/351827 co-relation queries the response was YES. [2024-06-28 01:02:23,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66118 conditions, 13062 events. 7909/13062 cut-off events. For 351825/351827 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 104021 event pairs, 2642 based on Foata normal form. 3/13025 useless extension candidates. Maximal degree in co-relation 66038. Up to 11087 conditions per place. [2024-06-28 01:02:23,353 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 151 selfloop transitions, 109 changer transitions 0/273 dead transitions. [2024-06-28 01:02:23,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 273 transitions, 4085 flow [2024-06-28 01:02:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 01:02:23,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-28 01:02:23,355 INFO L175 Difference]: Start difference. First operand has 180 places, 247 transitions, 3160 flow. Second operand 6 states and 176 transitions. [2024-06-28 01:02:23,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 273 transitions, 4085 flow [2024-06-28 01:02:24,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 273 transitions, 3902 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 01:02:24,167 INFO L231 Difference]: Finished difference. Result has 183 places, 252 transitions, 3287 flow [2024-06-28 01:02:24,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3287, PETRI_PLACES=183, PETRI_TRANSITIONS=252} [2024-06-28 01:02:24,168 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 134 predicate places. [2024-06-28 01:02:24,168 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 252 transitions, 3287 flow [2024-06-28 01:02:24,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:24,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:24,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:24,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 01:02:24,169 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:24,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1198757951, now seen corresponding path program 3 times [2024-06-28 01:02:24,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:24,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794959073] [2024-06-28 01:02:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:24,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:24,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:24,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794959073] [2024-06-28 01:02:24,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794959073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:24,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:24,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:24,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629145143] [2024-06-28 01:02:24,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:24,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:24,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:24,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:24,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:24,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:24,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 252 transitions, 3287 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:24,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:24,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:24,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:25,588 INFO L124 PetriNetUnfolderBase]: 7902/13102 cut-off events. [2024-06-28 01:02:25,588 INFO L125 PetriNetUnfolderBase]: For 363406/363408 co-relation queries the response was YES. [2024-06-28 01:02:25,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66382 conditions, 13102 events. 7902/13102 cut-off events. For 363406/363408 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 104636 event pairs, 2658 based on Foata normal form. 3/13063 useless extension candidates. Maximal degree in co-relation 66301. Up to 11083 conditions per place. [2024-06-28 01:02:25,721 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 145 selfloop transitions, 114 changer transitions 0/272 dead transitions. [2024-06-28 01:02:25,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 272 transitions, 4037 flow [2024-06-28 01:02:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 01:02:25,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-28 01:02:25,723 INFO L175 Difference]: Start difference. First operand has 183 places, 252 transitions, 3287 flow. Second operand 6 states and 176 transitions. [2024-06-28 01:02:25,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 272 transitions, 4037 flow [2024-06-28 01:02:26,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 272 transitions, 3692 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:26,626 INFO L231 Difference]: Finished difference. Result has 184 places, 252 transitions, 3181 flow [2024-06-28 01:02:26,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3181, PETRI_PLACES=184, PETRI_TRANSITIONS=252} [2024-06-28 01:02:26,627 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 135 predicate places. [2024-06-28 01:02:26,627 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 252 transitions, 3181 flow [2024-06-28 01:02:26,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:26,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:26,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:26,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 01:02:26,627 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:26,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash -656090766, now seen corresponding path program 3 times [2024-06-28 01:02:26,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:26,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162847421] [2024-06-28 01:02:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:26,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:26,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:26,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162847421] [2024-06-28 01:02:26,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162847421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:26,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:26,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:26,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348125030] [2024-06-28 01:02:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:26,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:26,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:26,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:26,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 252 transitions, 3181 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:26,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:26,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:26,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:28,128 INFO L124 PetriNetUnfolderBase]: 7892/13039 cut-off events. [2024-06-28 01:02:28,128 INFO L125 PetriNetUnfolderBase]: For 369890/369892 co-relation queries the response was YES. [2024-06-28 01:02:28,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65997 conditions, 13039 events. 7892/13039 cut-off events. For 369890/369892 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 103947 event pairs, 2633 based on Foata normal form. 2/12986 useless extension candidates. Maximal degree in co-relation 65916. Up to 11079 conditions per place. [2024-06-28 01:02:28,247 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 160 selfloop transitions, 106 changer transitions 0/279 dead transitions. [2024-06-28 01:02:28,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 279 transitions, 4063 flow [2024-06-28 01:02:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-28 01:02:28,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-28 01:02:28,248 INFO L175 Difference]: Start difference. First operand has 184 places, 252 transitions, 3181 flow. Second operand 6 states and 181 transitions. [2024-06-28 01:02:28,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 279 transitions, 4063 flow [2024-06-28 01:02:28,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 279 transitions, 3766 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:28,947 INFO L231 Difference]: Finished difference. Result has 184 places, 252 transitions, 3105 flow [2024-06-28 01:02:28,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2884, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3105, PETRI_PLACES=184, PETRI_TRANSITIONS=252} [2024-06-28 01:02:28,947 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 135 predicate places. [2024-06-28 01:02:28,947 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 252 transitions, 3105 flow [2024-06-28 01:02:28,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:28,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:28,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:28,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 01:02:28,948 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:28,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash 96954354, now seen corresponding path program 4 times [2024-06-28 01:02:28,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:28,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597776278] [2024-06-28 01:02:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:28,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:29,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:29,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597776278] [2024-06-28 01:02:29,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597776278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:29,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:29,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:29,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847236951] [2024-06-28 01:02:29,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:29,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:29,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:29,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:29,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:29,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 252 transitions, 3105 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:29,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:29,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:29,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:30,343 INFO L124 PetriNetUnfolderBase]: 7868/13020 cut-off events. [2024-06-28 01:02:30,343 INFO L125 PetriNetUnfolderBase]: For 380578/380580 co-relation queries the response was YES. [2024-06-28 01:02:30,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65536 conditions, 13020 events. 7868/13020 cut-off events. For 380578/380580 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 103936 event pairs, 2705 based on Foata normal form. 4/12973 useless extension candidates. Maximal degree in co-relation 65454. Up to 11061 conditions per place. [2024-06-28 01:02:30,467 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 158 selfloop transitions, 104 changer transitions 0/275 dead transitions. [2024-06-28 01:02:30,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 275 transitions, 3877 flow [2024-06-28 01:02:30,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 01:02:30,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-28 01:02:30,468 INFO L175 Difference]: Start difference. First operand has 184 places, 252 transitions, 3105 flow. Second operand 6 states and 179 transitions. [2024-06-28 01:02:30,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 275 transitions, 3877 flow [2024-06-28 01:02:31,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 275 transitions, 3632 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:31,315 INFO L231 Difference]: Finished difference. Result has 185 places, 252 transitions, 3077 flow [2024-06-28 01:02:31,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2860, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3077, PETRI_PLACES=185, PETRI_TRANSITIONS=252} [2024-06-28 01:02:31,316 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 136 predicate places. [2024-06-28 01:02:31,316 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 252 transitions, 3077 flow [2024-06-28 01:02:31,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:31,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:31,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:31,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 01:02:31,316 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:31,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1453395628, now seen corresponding path program 5 times [2024-06-28 01:02:31,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:31,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142216674] [2024-06-28 01:02:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:31,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:31,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142216674] [2024-06-28 01:02:31,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142216674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:31,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:31,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:31,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861310383] [2024-06-28 01:02:31,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:31,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:31,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:31,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:31,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:31,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:31,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 252 transitions, 3077 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:31,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:31,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:31,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:32,720 INFO L124 PetriNetUnfolderBase]: 7798/12927 cut-off events. [2024-06-28 01:02:32,720 INFO L125 PetriNetUnfolderBase]: For 388756/388758 co-relation queries the response was YES. [2024-06-28 01:02:32,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64997 conditions, 12927 events. 7798/12927 cut-off events. For 388756/388758 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 103015 event pairs, 2723 based on Foata normal form. 4/12880 useless extension candidates. Maximal degree in co-relation 64914. Up to 10955 conditions per place. [2024-06-28 01:02:32,851 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 153 selfloop transitions, 106 changer transitions 0/272 dead transitions. [2024-06-28 01:02:32,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 272 transitions, 3839 flow [2024-06-28 01:02:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 01:02:32,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-28 01:02:32,852 INFO L175 Difference]: Start difference. First operand has 185 places, 252 transitions, 3077 flow. Second operand 6 states and 176 transitions. [2024-06-28 01:02:32,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 272 transitions, 3839 flow [2024-06-28 01:02:33,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 272 transitions, 3609 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:33,786 INFO L231 Difference]: Finished difference. Result has 186 places, 252 transitions, 3068 flow [2024-06-28 01:02:33,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3068, PETRI_PLACES=186, PETRI_TRANSITIONS=252} [2024-06-28 01:02:33,787 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 137 predicate places. [2024-06-28 01:02:33,787 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 252 transitions, 3068 flow [2024-06-28 01:02:33,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:33,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:33,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:33,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 01:02:33,788 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:33,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:33,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1293064178, now seen corresponding path program 6 times [2024-06-28 01:02:33,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:33,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329735314] [2024-06-28 01:02:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:33,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:33,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:33,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329735314] [2024-06-28 01:02:33,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329735314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:33,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:33,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:33,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027044386] [2024-06-28 01:02:33,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:33,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:33,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:33,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:33,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:33,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 252 transitions, 3068 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:33,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:33,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:33,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:35,235 INFO L124 PetriNetUnfolderBase]: 7658/12584 cut-off events. [2024-06-28 01:02:35,235 INFO L125 PetriNetUnfolderBase]: For 394884/394886 co-relation queries the response was YES. [2024-06-28 01:02:35,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63909 conditions, 12584 events. 7658/12584 cut-off events. For 394884/394886 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 98961 event pairs, 2624 based on Foata normal form. 2/12546 useless extension candidates. Maximal degree in co-relation 63825. Up to 10713 conditions per place. [2024-06-28 01:02:35,369 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 148 selfloop transitions, 110 changer transitions 0/271 dead transitions. [2024-06-28 01:02:35,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 271 transitions, 3728 flow [2024-06-28 01:02:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 01:02:35,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 01:02:35,374 INFO L175 Difference]: Start difference. First operand has 186 places, 252 transitions, 3068 flow. Second operand 6 states and 173 transitions. [2024-06-28 01:02:35,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 271 transitions, 3728 flow [2024-06-28 01:02:36,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 271 transitions, 3490 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:36,242 INFO L231 Difference]: Finished difference. Result has 187 places, 252 transitions, 3059 flow [2024-06-28 01:02:36,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3059, PETRI_PLACES=187, PETRI_TRANSITIONS=252} [2024-06-28 01:02:36,242 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 138 predicate places. [2024-06-28 01:02:36,243 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 252 transitions, 3059 flow [2024-06-28 01:02:36,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:36,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:36,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:36,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 01:02:36,243 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:36,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:36,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1411321745, now seen corresponding path program 1 times [2024-06-28 01:02:36,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:36,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914650174] [2024-06-28 01:02:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:36,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:36,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:36,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914650174] [2024-06-28 01:02:36,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914650174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:36,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:36,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:36,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858706802] [2024-06-28 01:02:36,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:36,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:36,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:36,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:36,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:36,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:36,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 252 transitions, 3059 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:36,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:36,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:36,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:37,686 INFO L124 PetriNetUnfolderBase]: 7733/12710 cut-off events. [2024-06-28 01:02:37,686 INFO L125 PetriNetUnfolderBase]: For 414263/414265 co-relation queries the response was YES. [2024-06-28 01:02:37,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65069 conditions, 12710 events. 7733/12710 cut-off events. For 414263/414265 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 100246 event pairs, 2618 based on Foata normal form. 3/12658 useless extension candidates. Maximal degree in co-relation 64984. Up to 10776 conditions per place. [2024-06-28 01:02:37,820 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 158 selfloop transitions, 115 changer transitions 0/286 dead transitions. [2024-06-28 01:02:37,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 286 transitions, 4119 flow [2024-06-28 01:02:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 01:02:37,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-28 01:02:37,821 INFO L175 Difference]: Start difference. First operand has 187 places, 252 transitions, 3059 flow. Second operand 6 states and 179 transitions. [2024-06-28 01:02:37,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 286 transitions, 4119 flow [2024-06-28 01:02:38,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 286 transitions, 3755 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:02:38,620 INFO L231 Difference]: Finished difference. Result has 184 places, 262 transitions, 3084 flow [2024-06-28 01:02:38,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2711, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3084, PETRI_PLACES=184, PETRI_TRANSITIONS=262} [2024-06-28 01:02:38,620 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 135 predicate places. [2024-06-28 01:02:38,621 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 262 transitions, 3084 flow [2024-06-28 01:02:38,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:38,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:38,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:38,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 01:02:38,622 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:38,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:38,622 INFO L85 PathProgramCache]: Analyzing trace with hash 96962445, now seen corresponding path program 2 times [2024-06-28 01:02:38,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:38,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231300755] [2024-06-28 01:02:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:38,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:38,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:38,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231300755] [2024-06-28 01:02:38,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231300755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:38,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:38,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:38,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342399466] [2024-06-28 01:02:38,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:38,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:38,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:38,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:38,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:38,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 262 transitions, 3084 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:38,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:38,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:38,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:40,078 INFO L124 PetriNetUnfolderBase]: 7724/12698 cut-off events. [2024-06-28 01:02:40,078 INFO L125 PetriNetUnfolderBase]: For 423728/423730 co-relation queries the response was YES. [2024-06-28 01:02:40,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64940 conditions, 12698 events. 7724/12698 cut-off events. For 423728/423730 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 100101 event pairs, 2618 based on Foata normal form. 3/12646 useless extension candidates. Maximal degree in co-relation 64854. Up to 10769 conditions per place. [2024-06-28 01:02:40,205 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 155 selfloop transitions, 120 changer transitions 0/288 dead transitions. [2024-06-28 01:02:40,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 288 transitions, 3906 flow [2024-06-28 01:02:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 01:02:40,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-28 01:02:40,206 INFO L175 Difference]: Start difference. First operand has 184 places, 262 transitions, 3084 flow. Second operand 6 states and 182 transitions. [2024-06-28 01:02:40,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 288 transitions, 3906 flow [2024-06-28 01:02:40,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 288 transitions, 3757 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:40,939 INFO L231 Difference]: Finished difference. Result has 188 places, 262 transitions, 3186 flow [2024-06-28 01:02:40,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3186, PETRI_PLACES=188, PETRI_TRANSITIONS=262} [2024-06-28 01:02:40,939 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 139 predicate places. [2024-06-28 01:02:40,940 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 262 transitions, 3186 flow [2024-06-28 01:02:40,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:40,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:40,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:40,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 01:02:40,940 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:40,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1440316387, now seen corresponding path program 3 times [2024-06-28 01:02:40,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:40,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729677801] [2024-06-28 01:02:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:40,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:41,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:41,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729677801] [2024-06-28 01:02:41,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729677801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:41,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:41,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:41,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83369148] [2024-06-28 01:02:41,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:41,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:41,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:41,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:41,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:41,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:41,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 262 transitions, 3186 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:41,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:41,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:41,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:42,393 INFO L124 PetriNetUnfolderBase]: 7654/12570 cut-off events. [2024-06-28 01:02:42,393 INFO L125 PetriNetUnfolderBase]: For 434798/434800 co-relation queries the response was YES. [2024-06-28 01:02:42,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64778 conditions, 12570 events. 7654/12570 cut-off events. For 434798/434800 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 98728 event pairs, 2682 based on Foata normal form. 3/12520 useless extension candidates. Maximal degree in co-relation 64691. Up to 10642 conditions per place. [2024-06-28 01:02:42,524 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 166 selfloop transitions, 102 changer transitions 0/281 dead transitions. [2024-06-28 01:02:42,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 281 transitions, 3872 flow [2024-06-28 01:02:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 01:02:42,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-28 01:02:42,525 INFO L175 Difference]: Start difference. First operand has 188 places, 262 transitions, 3186 flow. Second operand 6 states and 172 transitions. [2024-06-28 01:02:42,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 281 transitions, 3872 flow [2024-06-28 01:02:43,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 281 transitions, 3651 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:43,701 INFO L231 Difference]: Finished difference. Result has 190 places, 262 transitions, 3177 flow [2024-06-28 01:02:43,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2965, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3177, PETRI_PLACES=190, PETRI_TRANSITIONS=262} [2024-06-28 01:02:43,702 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 141 predicate places. [2024-06-28 01:02:43,702 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 262 transitions, 3177 flow [2024-06-28 01:02:43,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:43,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:43,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:43,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 01:02:43,703 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:43,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:43,703 INFO L85 PathProgramCache]: Analyzing trace with hash -799204050, now seen corresponding path program 1 times [2024-06-28 01:02:43,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:43,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157845399] [2024-06-28 01:02:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:43,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:43,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:43,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157845399] [2024-06-28 01:02:43,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157845399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:43,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:43,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:43,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126742615] [2024-06-28 01:02:43,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:43,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:43,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:43,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:43,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:43,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:43,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 262 transitions, 3177 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:43,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:43,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:43,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:45,225 INFO L124 PetriNetUnfolderBase]: 7754/12704 cut-off events. [2024-06-28 01:02:45,225 INFO L125 PetriNetUnfolderBase]: For 468480/468480 co-relation queries the response was YES. [2024-06-28 01:02:45,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66064 conditions, 12704 events. 7754/12704 cut-off events. For 468480/468480 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 99524 event pairs, 2296 based on Foata normal form. 12/12668 useless extension candidates. Maximal degree in co-relation 65976. Up to 7793 conditions per place. [2024-06-28 01:02:45,366 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 170 selfloop transitions, 130 changer transitions 0/313 dead transitions. [2024-06-28 01:02:45,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 313 transitions, 4182 flow [2024-06-28 01:02:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-28 01:02:45,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.707936507936508 [2024-06-28 01:02:45,367 INFO L175 Difference]: Start difference. First operand has 190 places, 262 transitions, 3177 flow. Second operand 7 states and 223 transitions. [2024-06-28 01:02:45,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 313 transitions, 4182 flow [2024-06-28 01:02:46,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 313 transitions, 3754 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 01:02:46,469 INFO L231 Difference]: Finished difference. Result has 189 places, 265 transitions, 3078 flow [2024-06-28 01:02:46,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2749, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3078, PETRI_PLACES=189, PETRI_TRANSITIONS=265} [2024-06-28 01:02:46,470 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 140 predicate places. [2024-06-28 01:02:46,470 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 265 transitions, 3078 flow [2024-06-28 01:02:46,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:46,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:46,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:46,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 01:02:46,471 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:46,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:46,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1037436792, now seen corresponding path program 2 times [2024-06-28 01:02:46,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:46,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255140716] [2024-06-28 01:02:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:46,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:46,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:46,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255140716] [2024-06-28 01:02:46,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255140716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:46,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:46,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:46,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421922289] [2024-06-28 01:02:46,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:46,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:46,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:46,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:46,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:46,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:46,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 265 transitions, 3078 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:46,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:46,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:46,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:47,998 INFO L124 PetriNetUnfolderBase]: 7854/12898 cut-off events. [2024-06-28 01:02:47,998 INFO L125 PetriNetUnfolderBase]: For 483967/483967 co-relation queries the response was YES. [2024-06-28 01:02:48,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67815 conditions, 12898 events. 7854/12898 cut-off events. For 483967/483967 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 101731 event pairs, 2578 based on Foata normal form. 12/12859 useless extension candidates. Maximal degree in co-relation 67727. Up to 10838 conditions per place. [2024-06-28 01:02:48,129 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 170 selfloop transitions, 123 changer transitions 0/306 dead transitions. [2024-06-28 01:02:48,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 306 transitions, 3935 flow [2024-06-28 01:02:48,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-28 01:02:48,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793650793650794 [2024-06-28 01:02:48,130 INFO L175 Difference]: Start difference. First operand has 189 places, 265 transitions, 3078 flow. Second operand 7 states and 214 transitions. [2024-06-28 01:02:48,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 306 transitions, 3935 flow [2024-06-28 01:02:49,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 306 transitions, 3683 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:49,708 INFO L231 Difference]: Finished difference. Result has 192 places, 268 transitions, 3148 flow [2024-06-28 01:02:49,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3148, PETRI_PLACES=192, PETRI_TRANSITIONS=268} [2024-06-28 01:02:49,708 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2024-06-28 01:02:49,708 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 268 transitions, 3148 flow [2024-06-28 01:02:49,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:49,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:49,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:49,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 01:02:49,709 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:49,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:49,709 INFO L85 PathProgramCache]: Analyzing trace with hash 302565324, now seen corresponding path program 3 times [2024-06-28 01:02:49,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:49,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566998527] [2024-06-28 01:02:49,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:49,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:49,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:49,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566998527] [2024-06-28 01:02:49,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566998527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:49,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:49,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:49,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622819543] [2024-06-28 01:02:49,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:49,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:49,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:49,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:49,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:49,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 268 transitions, 3148 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:49,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:49,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:49,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:51,242 INFO L124 PetriNetUnfolderBase]: 7954/13000 cut-off events. [2024-06-28 01:02:51,243 INFO L125 PetriNetUnfolderBase]: For 502927/502927 co-relation queries the response was YES. [2024-06-28 01:02:51,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68926 conditions, 13000 events. 7954/13000 cut-off events. For 502927/502927 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 102319 event pairs, 2578 based on Foata normal form. 12/12964 useless extension candidates. Maximal degree in co-relation 68837. Up to 10986 conditions per place. [2024-06-28 01:02:51,374 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 170 selfloop transitions, 120 changer transitions 0/303 dead transitions. [2024-06-28 01:02:51,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 303 transitions, 3989 flow [2024-06-28 01:02:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-28 01:02:51,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-28 01:02:51,376 INFO L175 Difference]: Start difference. First operand has 192 places, 268 transitions, 3148 flow. Second operand 7 states and 207 transitions. [2024-06-28 01:02:51,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 303 transitions, 3989 flow [2024-06-28 01:02:52,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 303 transitions, 3718 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:52,624 INFO L231 Difference]: Finished difference. Result has 194 places, 271 transitions, 3197 flow [2024-06-28 01:02:52,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3197, PETRI_PLACES=194, PETRI_TRANSITIONS=271} [2024-06-28 01:02:52,624 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 145 predicate places. [2024-06-28 01:02:52,624 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 271 transitions, 3197 flow [2024-06-28 01:02:52,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:52,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:52,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 01:02:52,625 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:52,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:52,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2105713002, now seen corresponding path program 4 times [2024-06-28 01:02:52,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:52,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829893613] [2024-06-28 01:02:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:52,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:52,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:52,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829893613] [2024-06-28 01:02:52,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829893613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:52,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:52,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:52,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919510323] [2024-06-28 01:02:52,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:52,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:52,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:52,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:52,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:52,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:52,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 271 transitions, 3197 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:52,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:52,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:54,183 INFO L124 PetriNetUnfolderBase]: 7810/12796 cut-off events. [2024-06-28 01:02:54,183 INFO L125 PetriNetUnfolderBase]: For 499202/499204 co-relation queries the response was YES. [2024-06-28 01:02:54,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64852 conditions, 12796 events. 7810/12796 cut-off events. For 499202/499204 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 100379 event pairs, 2490 based on Foata normal form. 54/12791 useless extension candidates. Maximal degree in co-relation 64762. Up to 10320 conditions per place. [2024-06-28 01:02:54,320 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 169 selfloop transitions, 117 changer transitions 0/299 dead transitions. [2024-06-28 01:02:54,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 299 transitions, 3955 flow [2024-06-28 01:02:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 01:02:54,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-28 01:02:54,322 INFO L175 Difference]: Start difference. First operand has 194 places, 271 transitions, 3197 flow. Second operand 7 states and 205 transitions. [2024-06-28 01:02:54,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 299 transitions, 3955 flow [2024-06-28 01:02:55,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 299 transitions, 3668 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:55,377 INFO L231 Difference]: Finished difference. Result has 196 places, 271 transitions, 3152 flow [2024-06-28 01:02:55,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3152, PETRI_PLACES=196, PETRI_TRANSITIONS=271} [2024-06-28 01:02:55,377 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 147 predicate places. [2024-06-28 01:02:55,377 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 271 transitions, 3152 flow [2024-06-28 01:02:55,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:55,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:55,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 01:02:55,378 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:55,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1652897546, now seen corresponding path program 1 times [2024-06-28 01:02:55,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:55,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573195131] [2024-06-28 01:02:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:55,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:55,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:55,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573195131] [2024-06-28 01:02:55,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573195131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:55,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:55,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:55,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108164191] [2024-06-28 01:02:55,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:55,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:55,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:55,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:55,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:55,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 271 transitions, 3152 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:55,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:55,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:56,991 INFO L124 PetriNetUnfolderBase]: 7805/12686 cut-off events. [2024-06-28 01:02:56,992 INFO L125 PetriNetUnfolderBase]: For 410270/410275 co-relation queries the response was YES. [2024-06-28 01:02:57,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64139 conditions, 12686 events. 7805/12686 cut-off events. For 410270/410275 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 98784 event pairs, 2346 based on Foata normal form. 6/12687 useless extension candidates. Maximal degree in co-relation 64048. Up to 11805 conditions per place. [2024-06-28 01:02:57,114 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 259 selfloop transitions, 20 changer transitions 0/292 dead transitions. [2024-06-28 01:02:57,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 292 transitions, 3792 flow [2024-06-28 01:02:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-28 01:02:57,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962962962962963 [2024-06-28 01:02:57,115 INFO L175 Difference]: Start difference. First operand has 196 places, 271 transitions, 3152 flow. Second operand 6 states and 161 transitions. [2024-06-28 01:02:57,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 292 transitions, 3792 flow [2024-06-28 01:02:58,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 292 transitions, 3469 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 01:02:58,053 INFO L231 Difference]: Finished difference. Result has 195 places, 273 transitions, 2918 flow [2024-06-28 01:02:58,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2829, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2918, PETRI_PLACES=195, PETRI_TRANSITIONS=273} [2024-06-28 01:02:58,054 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 146 predicate places. [2024-06-28 01:02:58,054 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 273 transitions, 2918 flow [2024-06-28 01:02:58,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:58,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:58,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:58,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 01:02:58,055 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:58,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:58,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1667182346, now seen corresponding path program 2 times [2024-06-28 01:02:58,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:58,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494516939] [2024-06-28 01:02:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:58,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:58,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:58,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494516939] [2024-06-28 01:02:58,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494516939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:58,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:58,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:58,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364293356] [2024-06-28 01:02:58,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:58,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:58,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:58,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:58,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:58,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:02:58,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 273 transitions, 2918 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:58,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:58,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:02:58,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:59,774 INFO L124 PetriNetUnfolderBase]: 7800/12779 cut-off events. [2024-06-28 01:02:59,775 INFO L125 PetriNetUnfolderBase]: For 412395/412400 co-relation queries the response was YES. [2024-06-28 01:02:59,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62552 conditions, 12779 events. 7800/12779 cut-off events. For 412395/412400 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 100299 event pairs, 2461 based on Foata normal form. 6/12774 useless extension candidates. Maximal degree in co-relation 62460. Up to 11752 conditions per place. [2024-06-28 01:02:59,900 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 260 selfloop transitions, 22 changer transitions 0/295 dead transitions. [2024-06-28 01:02:59,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 295 transitions, 3570 flow [2024-06-28 01:02:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-28 01:02:59,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962962962962963 [2024-06-28 01:02:59,901 INFO L175 Difference]: Start difference. First operand has 195 places, 273 transitions, 2918 flow. Second operand 6 states and 161 transitions. [2024-06-28 01:02:59,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 295 transitions, 3570 flow [2024-06-28 01:03:00,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 295 transitions, 3501 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 01:03:00,555 INFO L231 Difference]: Finished difference. Result has 197 places, 275 transitions, 2946 flow [2024-06-28 01:03:00,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2946, PETRI_PLACES=197, PETRI_TRANSITIONS=275} [2024-06-28 01:03:00,556 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 148 predicate places. [2024-06-28 01:03:00,556 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 275 transitions, 2946 flow [2024-06-28 01:03:00,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:00,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:00,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:00,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 01:03:00,557 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:00,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:00,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1407282736, now seen corresponding path program 1 times [2024-06-28 01:03:00,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:00,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051421572] [2024-06-28 01:03:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:00,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:00,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:00,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051421572] [2024-06-28 01:03:00,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051421572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:00,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:00,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:00,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952878559] [2024-06-28 01:03:00,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:00,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:00,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:00,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:00,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:00,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:03:00,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 275 transitions, 2946 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:00,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:00,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:03:00,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:02,129 INFO L124 PetriNetUnfolderBase]: 7818/12838 cut-off events. [2024-06-28 01:03:02,130 INFO L125 PetriNetUnfolderBase]: For 427191/427191 co-relation queries the response was YES. [2024-06-28 01:03:02,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63055 conditions, 12838 events. 7818/12838 cut-off events. For 427191/427191 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 100972 event pairs, 3843 based on Foata normal form. 2/12794 useless extension candidates. Maximal degree in co-relation 62962. Up to 11763 conditions per place. [2024-06-28 01:03:02,280 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 271 selfloop transitions, 22 changer transitions 0/306 dead transitions. [2024-06-28 01:03:02,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 306 transitions, 3784 flow [2024-06-28 01:03:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-28 01:03:02,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 01:03:02,281 INFO L175 Difference]: Start difference. First operand has 197 places, 275 transitions, 2946 flow. Second operand 6 states and 168 transitions. [2024-06-28 01:03:02,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 306 transitions, 3784 flow [2024-06-28 01:03:03,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 306 transitions, 3703 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 01:03:03,238 INFO L231 Difference]: Finished difference. Result has 199 places, 279 transitions, 2986 flow [2024-06-28 01:03:03,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2986, PETRI_PLACES=199, PETRI_TRANSITIONS=279} [2024-06-28 01:03:03,238 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 150 predicate places. [2024-06-28 01:03:03,238 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 279 transitions, 2986 flow [2024-06-28 01:03:03,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:03,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:03,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:03,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 01:03:03,239 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:03,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:03,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1404425776, now seen corresponding path program 2 times [2024-06-28 01:03:03,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:03,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625754097] [2024-06-28 01:03:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:03,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:03,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:03,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625754097] [2024-06-28 01:03:03,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625754097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:03,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:03,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:03,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440036485] [2024-06-28 01:03:03,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:03,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:03,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:03,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:03:03,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 279 transitions, 2986 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:03,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:03,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:03:03,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:04,753 INFO L124 PetriNetUnfolderBase]: 7813/13083 cut-off events. [2024-06-28 01:03:04,754 INFO L125 PetriNetUnfolderBase]: For 436598/436598 co-relation queries the response was YES. [2024-06-28 01:03:04,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63315 conditions, 13083 events. 7813/13083 cut-off events. For 436598/436598 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 104452 event pairs, 3642 based on Foata normal form. 2/13072 useless extension candidates. Maximal degree in co-relation 63221. Up to 11817 conditions per place. [2024-06-28 01:03:04,892 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 268 selfloop transitions, 20 changer transitions 0/301 dead transitions. [2024-06-28 01:03:04,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 301 transitions, 3612 flow [2024-06-28 01:03:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-28 01:03:04,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074074074074074 [2024-06-28 01:03:04,893 INFO L175 Difference]: Start difference. First operand has 199 places, 279 transitions, 2986 flow. Second operand 6 states and 164 transitions. [2024-06-28 01:03:04,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 301 transitions, 3612 flow [2024-06-28 01:03:05,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 301 transitions, 3541 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-28 01:03:05,778 INFO L231 Difference]: Finished difference. Result has 203 places, 279 transitions, 2960 flow [2024-06-28 01:03:05,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2915, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2960, PETRI_PLACES=203, PETRI_TRANSITIONS=279} [2024-06-28 01:03:05,778 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 154 predicate places. [2024-06-28 01:03:05,779 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 279 transitions, 2960 flow [2024-06-28 01:03:05,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:05,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:05,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:05,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 01:03:05,779 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:05,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:05,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1504764416, now seen corresponding path program 1 times [2024-06-28 01:03:05,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:05,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789594936] [2024-06-28 01:03:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:05,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:05,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:05,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789594936] [2024-06-28 01:03:05,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789594936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:05,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:05,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:05,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149032330] [2024-06-28 01:03:05,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:05,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:05,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:05,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:05,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:05,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:03:05,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 279 transitions, 2960 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:05,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:05,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:03:05,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:07,414 INFO L124 PetriNetUnfolderBase]: 8219/13467 cut-off events. [2024-06-28 01:03:07,415 INFO L125 PetriNetUnfolderBase]: For 560810/560812 co-relation queries the response was YES. [2024-06-28 01:03:07,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65949 conditions, 13467 events. 8219/13467 cut-off events. For 560810/560812 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 106667 event pairs, 2590 based on Foata normal form. 54/13465 useless extension candidates. Maximal degree in co-relation 65853. Up to 10947 conditions per place. [2024-06-28 01:03:07,556 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 183 selfloop transitions, 117 changer transitions 0/313 dead transitions. [2024-06-28 01:03:07,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 313 transitions, 3830 flow [2024-06-28 01:03:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 01:03:07,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-28 01:03:07,557 INFO L175 Difference]: Start difference. First operand has 203 places, 279 transitions, 2960 flow. Second operand 7 states and 208 transitions. [2024-06-28 01:03:07,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 313 transitions, 3830 flow [2024-06-28 01:03:08,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 313 transitions, 3780 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:08,633 INFO L231 Difference]: Finished difference. Result has 205 places, 282 transitions, 3224 flow [2024-06-28 01:03:08,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3224, PETRI_PLACES=205, PETRI_TRANSITIONS=282} [2024-06-28 01:03:08,633 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 156 predicate places. [2024-06-28 01:03:08,633 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 282 transitions, 3224 flow [2024-06-28 01:03:08,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:08,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:08,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:08,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 01:03:08,634 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:08,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1928027574, now seen corresponding path program 2 times [2024-06-28 01:03:08,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:08,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111201516] [2024-06-28 01:03:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:08,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:08,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:08,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111201516] [2024-06-28 01:03:08,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111201516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:08,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:08,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:08,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771377329] [2024-06-28 01:03:08,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:08,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:08,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:08,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:08,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:08,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:03:08,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 282 transitions, 3224 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:08,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:08,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:03:08,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:10,268 INFO L124 PetriNetUnfolderBase]: 8319/13585 cut-off events. [2024-06-28 01:03:10,268 INFO L125 PetriNetUnfolderBase]: For 498726/498728 co-relation queries the response was YES. [2024-06-28 01:03:10,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68495 conditions, 13585 events. 8319/13585 cut-off events. For 498726/498728 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 107574 event pairs, 2628 based on Foata normal form. 12/13553 useless extension candidates. Maximal degree in co-relation 68398. Up to 11533 conditions per place. [2024-06-28 01:03:10,407 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 178 selfloop transitions, 120 changer transitions 0/311 dead transitions. [2024-06-28 01:03:10,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 311 transitions, 4082 flow [2024-06-28 01:03:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-28 01:03:10,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-28 01:03:10,408 INFO L175 Difference]: Start difference. First operand has 205 places, 282 transitions, 3224 flow. Second operand 7 states and 201 transitions. [2024-06-28 01:03:10,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 311 transitions, 4082 flow [2024-06-28 01:03:11,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 311 transitions, 3798 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:11,665 INFO L231 Difference]: Finished difference. Result has 207 places, 285 transitions, 3265 flow [2024-06-28 01:03:11,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3265, PETRI_PLACES=207, PETRI_TRANSITIONS=285} [2024-06-28 01:03:11,665 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 158 predicate places. [2024-06-28 01:03:11,665 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 285 transitions, 3265 flow [2024-06-28 01:03:11,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:11,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:11,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:11,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 01:03:11,666 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:11,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1658617418, now seen corresponding path program 3 times [2024-06-28 01:03:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:11,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825071306] [2024-06-28 01:03:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:11,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:11,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:11,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825071306] [2024-06-28 01:03:11,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825071306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:11,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:11,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:11,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710380687] [2024-06-28 01:03:11,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:11,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:11,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:11,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:11,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:11,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:03:11,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 285 transitions, 3265 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:11,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:11,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:03:11,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:13,580 INFO L124 PetriNetUnfolderBase]: 8419/13733 cut-off events. [2024-06-28 01:03:13,581 INFO L125 PetriNetUnfolderBase]: For 511983/511985 co-relation queries the response was YES. [2024-06-28 01:03:13,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68877 conditions, 13733 events. 8419/13733 cut-off events. For 511983/511985 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 108661 event pairs, 2650 based on Foata normal form. 12/13701 useless extension candidates. Maximal degree in co-relation 68779. Up to 11681 conditions per place. [2024-06-28 01:03:13,705 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 178 selfloop transitions, 123 changer transitions 0/314 dead transitions. [2024-06-28 01:03:13,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 314 transitions, 4137 flow [2024-06-28 01:03:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 01:03:13,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-28 01:03:13,707 INFO L175 Difference]: Start difference. First operand has 207 places, 285 transitions, 3265 flow. Second operand 7 states and 202 transitions. [2024-06-28 01:03:13,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 314 transitions, 4137 flow [2024-06-28 01:03:14,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 314 transitions, 3838 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:14,892 INFO L231 Difference]: Finished difference. Result has 209 places, 288 transitions, 3303 flow [2024-06-28 01:03:14,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3303, PETRI_PLACES=209, PETRI_TRANSITIONS=288} [2024-06-28 01:03:14,893 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 160 predicate places. [2024-06-28 01:03:14,893 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 288 transitions, 3303 flow [2024-06-28 01:03:14,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:14,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:14,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:14,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 01:03:14,893 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:14,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:14,894 INFO L85 PathProgramCache]: Analyzing trace with hash -670342656, now seen corresponding path program 4 times [2024-06-28 01:03:14,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:14,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249833785] [2024-06-28 01:03:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:14,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:14,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:14,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249833785] [2024-06-28 01:03:14,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249833785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:14,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:14,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:14,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338526971] [2024-06-28 01:03:14,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:14,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:14,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:14,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:15,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:03:15,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 288 transitions, 3303 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:15,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:15,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:03:15,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:16,782 INFO L124 PetriNetUnfolderBase]: 8899/14475 cut-off events. [2024-06-28 01:03:16,782 INFO L125 PetriNetUnfolderBase]: For 617046/617048 co-relation queries the response was YES. [2024-06-28 01:03:16,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74821 conditions, 14475 events. 8899/14475 cut-off events. For 617046/617048 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 115040 event pairs, 2760 based on Foata normal form. 12/14445 useless extension candidates. Maximal degree in co-relation 74722. Up to 10922 conditions per place. [2024-06-28 01:03:16,935 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 185 selfloop transitions, 128 changer transitions 0/326 dead transitions. [2024-06-28 01:03:16,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 326 transitions, 4411 flow [2024-06-28 01:03:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:16,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 01:03:16,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-28 01:03:16,936 INFO L175 Difference]: Start difference. First operand has 209 places, 288 transitions, 3303 flow. Second operand 7 states and 208 transitions. [2024-06-28 01:03:16,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 326 transitions, 4411 flow [2024-06-28 01:03:18,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 326 transitions, 4100 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:18,583 INFO L231 Difference]: Finished difference. Result has 212 places, 293 transitions, 3423 flow [2024-06-28 01:03:18,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3423, PETRI_PLACES=212, PETRI_TRANSITIONS=293} [2024-06-28 01:03:18,583 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 163 predicate places. [2024-06-28 01:03:18,584 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 293 transitions, 3423 flow [2024-06-28 01:03:18,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:18,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:18,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:18,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 01:03:18,584 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:18,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash 628356376, now seen corresponding path program 1 times [2024-06-28 01:03:18,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:18,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960261965] [2024-06-28 01:03:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:18,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:18,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960261965] [2024-06-28 01:03:18,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960261965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:18,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:18,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:18,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349555305] [2024-06-28 01:03:18,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:18,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:03:18,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:03:18,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:03:18,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 01:03:18,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 293 transitions, 3423 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:18,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:18,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 01:03:18,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:21,327 INFO L124 PetriNetUnfolderBase]: 11407/20274 cut-off events. [2024-06-28 01:03:21,327 INFO L125 PetriNetUnfolderBase]: For 459597/460302 co-relation queries the response was YES. [2024-06-28 01:03:21,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96590 conditions, 20274 events. 11407/20274 cut-off events. For 459597/460302 co-relation queries the response was YES. Maximal size of possible extension queue 1421. Compared 186150 event pairs, 2997 based on Foata normal form. 879/19774 useless extension candidates. Maximal degree in co-relation 96489. Up to 9176 conditions per place. [2024-06-28 01:03:21,592 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 201 selfloop transitions, 271 changer transitions 172/725 dead transitions. [2024-06-28 01:03:21,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 725 transitions, 9312 flow [2024-06-28 01:03:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-28 01:03:21,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7047619047619048 [2024-06-28 01:03:21,593 INFO L175 Difference]: Start difference. First operand has 212 places, 293 transitions, 3423 flow. Second operand 7 states and 222 transitions. [2024-06-28 01:03:21,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 725 transitions, 9312 flow [2024-06-28 01:03:23,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 725 transitions, 8329 flow, removed 165 selfloop flow, removed 6 redundant places. [2024-06-28 01:03:23,588 INFO L231 Difference]: Finished difference. Result has 218 places, 450 transitions, 5649 flow [2024-06-28 01:03:23,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3018, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5649, PETRI_PLACES=218, PETRI_TRANSITIONS=450} [2024-06-28 01:03:23,588 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 169 predicate places. [2024-06-28 01:03:23,589 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 450 transitions, 5649 flow [2024-06-28 01:03:23,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:23,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:23,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:23,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 01:03:23,589 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:23,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:23,590 INFO L85 PathProgramCache]: Analyzing trace with hash -207498014, now seen corresponding path program 1 times [2024-06-28 01:03:23,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:23,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988278588] [2024-06-28 01:03:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:23,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:23,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:23,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988278588] [2024-06-28 01:03:23,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988278588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:23,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:23,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:23,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048331044] [2024-06-28 01:03:23,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:23,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:23,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:23,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:23,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:23,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:03:23,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 450 transitions, 5649 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:23,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:23,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:03:23,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:27,272 INFO L124 PetriNetUnfolderBase]: 13493/22212 cut-off events. [2024-06-28 01:03:27,273 INFO L125 PetriNetUnfolderBase]: For 844204/844949 co-relation queries the response was YES. [2024-06-28 01:03:27,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118793 conditions, 22212 events. 13493/22212 cut-off events. For 844204/844949 co-relation queries the response was YES. Maximal size of possible extension queue 1494. Compared 185344 event pairs, 4835 based on Foata normal form. 696/22686 useless extension candidates. Maximal degree in co-relation 118688. Up to 18526 conditions per place. [2024-06-28 01:03:27,490 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 219 selfloop transitions, 125 changer transitions 131/489 dead transitions. [2024-06-28 01:03:27,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 489 transitions, 6946 flow [2024-06-28 01:03:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:27,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 01:03:27,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-28 01:03:27,492 INFO L175 Difference]: Start difference. First operand has 218 places, 450 transitions, 5649 flow. Second operand 7 states and 202 transitions. [2024-06-28 01:03:27,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 489 transitions, 6946 flow [2024-06-28 01:03:31,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 489 transitions, 6898 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-06-28 01:03:31,555 INFO L231 Difference]: Finished difference. Result has 225 places, 330 transitions, 4304 flow [2024-06-28 01:03:31,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4304, PETRI_PLACES=225, PETRI_TRANSITIONS=330} [2024-06-28 01:03:31,555 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 176 predicate places. [2024-06-28 01:03:31,556 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 330 transitions, 4304 flow [2024-06-28 01:03:31,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:31,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:31,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:31,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 01:03:31,556 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:31,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash 994480050, now seen corresponding path program 2 times [2024-06-28 01:03:31,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:31,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160705276] [2024-06-28 01:03:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:31,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:31,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160705276] [2024-06-28 01:03:31,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160705276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:31,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:31,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:31,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227265389] [2024-06-28 01:03:31,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:31,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:31,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:31,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:31,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:31,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:03:31,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 330 transitions, 4304 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:31,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:31,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:03:31,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:35,400 INFO L124 PetriNetUnfolderBase]: 12065/20340 cut-off events. [2024-06-28 01:03:35,400 INFO L125 PetriNetUnfolderBase]: For 1014402/1015124 co-relation queries the response was YES. [2024-06-28 01:03:35,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114780 conditions, 20340 events. 12065/20340 cut-off events. For 1014402/1015124 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 172083 event pairs, 3898 based on Foata normal form. 708/20939 useless extension candidates. Maximal degree in co-relation 114672. Up to 11300 conditions per place. [2024-06-28 01:03:35,600 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 251 selfloop transitions, 119 changer transitions 0/384 dead transitions. [2024-06-28 01:03:35,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 384 transitions, 5623 flow [2024-06-28 01:03:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-28 01:03:35,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-28 01:03:35,601 INFO L175 Difference]: Start difference. First operand has 225 places, 330 transitions, 4304 flow. Second operand 7 states and 217 transitions. [2024-06-28 01:03:35,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 384 transitions, 5623 flow [2024-06-28 01:03:37,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 384 transitions, 5356 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 01:03:37,883 INFO L231 Difference]: Finished difference. Result has 225 places, 334 transitions, 4435 flow [2024-06-28 01:03:37,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4037, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4435, PETRI_PLACES=225, PETRI_TRANSITIONS=334} [2024-06-28 01:03:37,883 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 176 predicate places. [2024-06-28 01:03:37,883 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 334 transitions, 4435 flow [2024-06-28 01:03:37,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:37,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:37,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:37,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 01:03:37,884 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:37,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:37,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1269405494, now seen corresponding path program 3 times [2024-06-28 01:03:37,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:37,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049729736] [2024-06-28 01:03:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:37,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:38,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:38,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049729736] [2024-06-28 01:03:38,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049729736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:38,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:38,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:38,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348633245] [2024-06-28 01:03:38,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:38,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:38,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:38,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:38,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:38,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:03:38,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 334 transitions, 4435 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:38,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:38,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:03:38,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:41,893 INFO L124 PetriNetUnfolderBase]: 12414/20908 cut-off events. [2024-06-28 01:03:41,893 INFO L125 PetriNetUnfolderBase]: For 1060943/1061707 co-relation queries the response was YES. [2024-06-28 01:03:42,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117965 conditions, 20908 events. 12414/20908 cut-off events. For 1060943/1061707 co-relation queries the response was YES. Maximal size of possible extension queue 1358. Compared 177920 event pairs, 4519 based on Foata normal form. 756/21554 useless extension candidates. Maximal degree in co-relation 117856. Up to 17522 conditions per place. [2024-06-28 01:03:42,116 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 243 selfloop transitions, 113 changer transitions 0/370 dead transitions. [2024-06-28 01:03:42,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 370 transitions, 5435 flow [2024-06-28 01:03:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 01:03:42,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-28 01:03:42,117 INFO L175 Difference]: Start difference. First operand has 225 places, 334 transitions, 4435 flow. Second operand 7 states and 206 transitions. [2024-06-28 01:03:42,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 370 transitions, 5435 flow [2024-06-28 01:03:45,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 370 transitions, 5100 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:45,165 INFO L231 Difference]: Finished difference. Result has 227 places, 336 transitions, 4381 flow [2024-06-28 01:03:45,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4381, PETRI_PLACES=227, PETRI_TRANSITIONS=336} [2024-06-28 01:03:45,165 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 178 predicate places. [2024-06-28 01:03:45,165 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 336 transitions, 4381 flow [2024-06-28 01:03:45,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:45,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:45,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:45,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 01:03:45,166 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:45,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:45,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1269731924, now seen corresponding path program 4 times [2024-06-28 01:03:45,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:45,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770021029] [2024-06-28 01:03:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:45,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:45,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:45,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770021029] [2024-06-28 01:03:45,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770021029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:45,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:45,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:45,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711102014] [2024-06-28 01:03:45,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:45,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:45,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:45,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:45,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:45,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:03:45,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 336 transitions, 4381 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:45,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:45,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:03:45,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:49,147 INFO L124 PetriNetUnfolderBase]: 12708/21446 cut-off events. [2024-06-28 01:03:49,147 INFO L125 PetriNetUnfolderBase]: For 1075969/1076757 co-relation queries the response was YES. [2024-06-28 01:03:49,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119663 conditions, 21446 events. 12708/21446 cut-off events. For 1075969/1076757 co-relation queries the response was YES. Maximal size of possible extension queue 1398. Compared 183426 event pairs, 4518 based on Foata normal form. 774/22104 useless extension candidates. Maximal degree in co-relation 119554. Up to 17408 conditions per place. [2024-06-28 01:03:49,412 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 248 selfloop transitions, 116 changer transitions 0/378 dead transitions. [2024-06-28 01:03:49,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 378 transitions, 5434 flow [2024-06-28 01:03:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-28 01:03:49,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-28 01:03:49,414 INFO L175 Difference]: Start difference. First operand has 227 places, 336 transitions, 4381 flow. Second operand 7 states and 211 transitions. [2024-06-28 01:03:49,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 378 transitions, 5434 flow [2024-06-28 01:03:53,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 378 transitions, 5189 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:53,130 INFO L231 Difference]: Finished difference. Result has 229 places, 338 transitions, 4434 flow [2024-06-28 01:03:53,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4434, PETRI_PLACES=229, PETRI_TRANSITIONS=338} [2024-06-28 01:03:53,131 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 180 predicate places. [2024-06-28 01:03:53,131 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 338 transitions, 4434 flow [2024-06-28 01:03:53,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:53,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:53,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:53,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 01:03:53,131 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:53,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:53,131 INFO L85 PathProgramCache]: Analyzing trace with hash 599113314, now seen corresponding path program 5 times [2024-06-28 01:03:53,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:53,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452886730] [2024-06-28 01:03:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:53,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:53,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:53,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452886730] [2024-06-28 01:03:53,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452886730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:53,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:53,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:53,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192524719] [2024-06-28 01:03:53,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:53,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:53,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:03:53,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 338 transitions, 4434 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:53,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:53,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:03:53,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:57,198 INFO L124 PetriNetUnfolderBase]: 12567/21172 cut-off events. [2024-06-28 01:03:57,199 INFO L125 PetriNetUnfolderBase]: For 1013728/1014613 co-relation queries the response was YES. [2024-06-28 01:03:57,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116085 conditions, 21172 events. 12567/21172 cut-off events. For 1013728/1014613 co-relation queries the response was YES. Maximal size of possible extension queue 1399. Compared 180816 event pairs, 4552 based on Foata normal form. 853/21867 useless extension candidates. Maximal degree in co-relation 115975. Up to 17767 conditions per place. [2024-06-28 01:03:57,430 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 218 selfloop transitions, 135 changer transitions 0/367 dead transitions. [2024-06-28 01:03:57,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 367 transitions, 5391 flow [2024-06-28 01:03:57,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-28 01:03:57,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 01:03:57,431 INFO L175 Difference]: Start difference. First operand has 229 places, 338 transitions, 4434 flow. Second operand 7 states and 203 transitions. [2024-06-28 01:03:57,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 367 transitions, 5391 flow [2024-06-28 01:04:00,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 367 transitions, 5122 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 01:04:00,255 INFO L231 Difference]: Finished difference. Result has 231 places, 339 transitions, 4463 flow [2024-06-28 01:04:00,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4165, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4463, PETRI_PLACES=231, PETRI_TRANSITIONS=339} [2024-06-28 01:04:00,256 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 182 predicate places. [2024-06-28 01:04:00,256 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 339 transitions, 4463 flow [2024-06-28 01:04:00,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:00,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:00,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:00,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 01:04:00,257 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:00,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:00,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1452288468, now seen corresponding path program 6 times [2024-06-28 01:04:00,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:00,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156554926] [2024-06-28 01:04:00,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:00,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:00,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:00,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156554926] [2024-06-28 01:04:00,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156554926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:00,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:00,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:04:00,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066050270] [2024-06-28 01:04:00,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:00,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:04:00,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:04:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:04:00,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 01:04:00,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 339 transitions, 4463 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:00,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:00,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 01:04:00,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:04,224 INFO L124 PetriNetUnfolderBase]: 12735/21454 cut-off events. [2024-06-28 01:04:04,224 INFO L125 PetriNetUnfolderBase]: For 986986/987898 co-relation queries the response was YES. [2024-06-28 01:04:04,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115694 conditions, 21454 events. 12735/21454 cut-off events. For 986986/987898 co-relation queries the response was YES. Maximal size of possible extension queue 1421. Compared 183478 event pairs, 4449 based on Foata normal form. 871/22152 useless extension candidates. Maximal degree in co-relation 115583. Up to 16257 conditions per place. [2024-06-28 01:04:04,455 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 227 selfloop transitions, 133 changer transitions 0/374 dead transitions. [2024-06-28 01:04:04,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 374 transitions, 5473 flow [2024-06-28 01:04:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:04:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:04:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 01:04:04,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-28 01:04:04,457 INFO L175 Difference]: Start difference. First operand has 231 places, 339 transitions, 4463 flow. Second operand 7 states and 206 transitions. [2024-06-28 01:04:04,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 374 transitions, 5473 flow