./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe036.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe036.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe036.i ./goblint.2024-05-21_14-57-05.files/protection/safe036.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:36:30,574 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:36:30,631 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:36:30,639 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:36:30,639 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:36:30,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:36:30,657 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:36:30,657 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:36:30,658 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:36:30,658 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:36:30,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:36:30,659 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:36:30,660 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:36:30,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:36:30,661 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:36:30,662 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:36:30,662 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:36:30,665 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:36:30,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:36:30,665 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:36:30,672 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:36:30,673 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:36:30,673 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:36:30,673 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:36:30,673 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:36:30,674 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:36:30,674 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:36:30,674 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:36:30,674 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:36:30,674 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:36:30,675 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:36:30,675 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:36:30,675 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:36:30,675 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:36:30,675 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:36:30,676 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:36:30,676 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:36:30,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:36:30,676 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:36:30,676 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:36:30,677 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:36:30,677 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:36:30,677 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:36:30,677 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:36:30,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:36:30,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:36:30,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:36:30,932 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:36:30,932 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:36:30,933 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-14 11:36:32,010 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:36:32,231 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:36:32,232 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-14 11:36:32,248 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2008af1b7/66af4c00afdf4195823ed590c5ac475f/FLAG1afb3b6ec [2024-06-14 11:36:32,259 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2008af1b7/66af4c00afdf4195823ed590c5ac475f [2024-06-14 11:36:32,261 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:36:32,261 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:36:32,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe036.yml/witness.yml [2024-06-14 11:36:32,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:36:32,361 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:36:32,362 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:36:32,362 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:36:32,365 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:36:32,366 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:36:32" (1/2) ... [2024-06-14 11:36:32,367 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7832f400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:36:32, skipping insertion in model container [2024-06-14 11:36:32,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:36:32" (1/2) ... [2024-06-14 11:36:32,369 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7ff23d54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:36:32, skipping insertion in model container [2024-06-14 11:36:32,369 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:36:32" (2/2) ... [2024-06-14 11:36:32,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7832f400 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32, skipping insertion in model container [2024-06-14 11:36:32,372 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:36:32" (2/2) ... [2024-06-14 11:36:32,372 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:36:32,403 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:36:32,405 INFO L97 edCorrectnessWitness]: Location invariant before [L767-L767] ((((! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 11:36:32,405 INFO L97 edCorrectnessWitness]: Location invariant before [L768-L768] ((((! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 11:36:32,405 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:36:32,405 INFO L106 edCorrectnessWitness]: ghost_update [L765-L765] multithreaded = 1; [2024-06-14 11:36:32,442 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:36:32,693 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:36:32,700 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:36:32,770 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:36:32,796 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:36:32,799 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32 WrapperNode [2024-06-14 11:36:32,799 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:36:32,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:36:32,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:36:32,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:36:32,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,855 INFO L138 Inliner]: procedures = 174, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 57 [2024-06-14 11:36:32,855 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:36:32,856 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:36:32,856 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:36:32,856 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:36:32,864 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,871 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,890 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]. [2024-06-14 11:36:32,890 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,890 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,904 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,906 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,915 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:36:32,917 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:36:32,918 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:36:32,918 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:36:32,919 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (1/1) ... [2024-06-14 11:36:32,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:36:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:36:32,966 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) [2024-06-14 11:36:33,051 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 [2024-06-14 11:36:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:36:33,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:36:33,102 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:36:33,102 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:36:33,102 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:36:33,102 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:36:33,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:36:33,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:36:33,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:36:33,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:36:33,104 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:36:33,193 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:36:33,195 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:36:33,357 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:36:33,357 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:36:33,413 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:36:33,413 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:36:33,413 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:36:33 BoogieIcfgContainer [2024-06-14 11:36:33,414 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:36:33,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:36:33,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:36:33,418 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:36:33,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:36:32" (1/4) ... [2024-06-14 11:36:33,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d32716e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:36:33, skipping insertion in model container [2024-06-14 11:36:33,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:36:32" (2/4) ... [2024-06-14 11:36:33,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d32716e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:36:33, skipping insertion in model container [2024-06-14 11:36:33,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:32" (3/4) ... [2024-06-14 11:36:33,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d32716e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:36:33, skipping insertion in model container [2024-06-14 11:36:33,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:36:33" (4/4) ... [2024-06-14 11:36:33,420 INFO L112 eAbstractionObserver]: Analyzing ICFG safe036.i [2024-06-14 11:36:33,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:36:33,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-14 11:36:33,434 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:36:33,460 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:36:33,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 32 transitions, 72 flow [2024-06-14 11:36:33,502 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2024-06-14 11:36:33,502 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:36:33,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 0/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:36:33,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 32 transitions, 72 flow [2024-06-14 11:36:33,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 24 transitions, 54 flow [2024-06-14 11:36:33,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:36:33,517 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;@f25673e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:36:33,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-14 11:36:33,521 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:36:33,521 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 11:36:33,521 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:36:33,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:33,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:36:33,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:33,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:33,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1644830107, now seen corresponding path program 1 times [2024-06-14 11:36:33,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:33,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109966669] [2024-06-14 11:36:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:33,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:33,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:33,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109966669] [2024-06-14 11:36:33,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109966669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:33,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:33,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:36:33,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474729071] [2024-06-14 11:36:33,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:33,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:36:33,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:33,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:36:33,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:36:33,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 32 [2024-06-14 11:36:33,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:33,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:33,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 32 [2024-06-14 11:36:33,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:33,990 INFO L124 PetriNetUnfolderBase]: 66/166 cut-off events. [2024-06-14 11:36:33,992 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-14 11:36:33,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 166 events. 66/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 648 event pairs, 33 based on Foata normal form. 1/152 useless extension candidates. Maximal degree in co-relation 297. Up to 124 conditions per place. [2024-06-14 11:36:33,998 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 19 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-06-14 11:36:33,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 113 flow [2024-06-14 11:36:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:36:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:36:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-06-14 11:36:34,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-14 11:36:34,011 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 54 flow. Second operand 3 states and 66 transitions. [2024-06-14 11:36:34,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 113 flow [2024-06-14 11:36:34,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:34,015 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 73 flow [2024-06-14 11:36:34,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-06-14 11:36:34,019 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-14 11:36:34,020 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 73 flow [2024-06-14 11:36:34,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:34,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:34,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:34,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:36:34,024 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:34,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:34,025 INFO L85 PathProgramCache]: Analyzing trace with hash 133969518, now seen corresponding path program 1 times [2024-06-14 11:36:34,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:34,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389089198] [2024-06-14 11:36:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:34,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389089198] [2024-06-14 11:36:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389089198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:34,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:34,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:36:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474111454] [2024-06-14 11:36:34,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:34,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:36:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:34,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:36:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:36:34,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 32 [2024-06-14 11:36:34,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:34,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:34,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 32 [2024-06-14 11:36:34,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:34,230 INFO L124 PetriNetUnfolderBase]: 80/183 cut-off events. [2024-06-14 11:36:34,230 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-14 11:36:34,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 183 events. 80/183 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 702 event pairs, 34 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 392. Up to 139 conditions per place. [2024-06-14 11:36:34,232 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 24 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-14 11:36:34,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 157 flow [2024-06-14 11:36:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:36:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:36:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-06-14 11:36:34,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6484375 [2024-06-14 11:36:34,234 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 73 flow. Second operand 4 states and 83 transitions. [2024-06-14 11:36:34,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 157 flow [2024-06-14 11:36:34,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:36:34,236 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 97 flow [2024-06-14 11:36:34,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-06-14 11:36:34,238 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-06-14 11:36:34,239 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 97 flow [2024-06-14 11:36:34,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:34,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:34,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:34,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:36:34,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:34,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:34,242 INFO L85 PathProgramCache]: Analyzing trace with hash -439591465, now seen corresponding path program 1 times [2024-06-14 11:36:34,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:34,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433485917] [2024-06-14 11:36:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:34,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:34,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:34,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433485917] [2024-06-14 11:36:34,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433485917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:34,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:34,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:36:34,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937683686] [2024-06-14 11:36:34,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:34,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:36:34,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:36:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:36:34,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 32 [2024-06-14 11:36:34,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:34,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:34,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 32 [2024-06-14 11:36:34,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:34,453 INFO L124 PetriNetUnfolderBase]: 79/185 cut-off events. [2024-06-14 11:36:34,454 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-06-14 11:36:34,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 185 events. 79/185 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 697 event pairs, 34 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 443. Up to 145 conditions per place. [2024-06-14 11:36:34,455 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 23 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-14 11:36:34,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 171 flow [2024-06-14 11:36:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:36:34,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:36:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-06-14 11:36:34,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6171875 [2024-06-14 11:36:34,457 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 97 flow. Second operand 4 states and 79 transitions. [2024-06-14 11:36:34,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 171 flow [2024-06-14 11:36:34,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 162 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:34,458 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 113 flow [2024-06-14 11:36:34,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2024-06-14 11:36:34,459 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-06-14 11:36:34,459 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 113 flow [2024-06-14 11:36:34,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:34,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:34,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:34,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:36:34,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:34,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:34,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2027892984, now seen corresponding path program 1 times [2024-06-14 11:36:34,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:34,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899360905] [2024-06-14 11:36:34,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:34,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:34,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:34,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899360905] [2024-06-14 11:36:34,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899360905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:34,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:34,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:34,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940688751] [2024-06-14 11:36:34,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:34,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:34,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:34,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:34,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:34,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:34,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:34,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:34,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:34,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:34,712 INFO L124 PetriNetUnfolderBase]: 95/213 cut-off events. [2024-06-14 11:36:34,713 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-06-14 11:36:34,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 213 events. 95/213 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 795 event pairs, 13 based on Foata normal form. 4/215 useless extension candidates. Maximal degree in co-relation 538. Up to 138 conditions per place. [2024-06-14 11:36:34,717 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 31 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2024-06-14 11:36:34,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 225 flow [2024-06-14 11:36:34,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 11:36:34,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-14 11:36:34,722 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 113 flow. Second operand 6 states and 111 transitions. [2024-06-14 11:36:34,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 225 flow [2024-06-14 11:36:34,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 216 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:34,726 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 129 flow [2024-06-14 11:36:34,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2024-06-14 11:36:34,727 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-14 11:36:34,727 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 129 flow [2024-06-14 11:36:34,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:34,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:34,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:34,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:36:34,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:34,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:34,730 INFO L85 PathProgramCache]: Analyzing trace with hash -791715360, now seen corresponding path program 1 times [2024-06-14 11:36:34,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:34,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699227161] [2024-06-14 11:36:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:34,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:34,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:34,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699227161] [2024-06-14 11:36:34,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699227161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:34,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:34,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:36:34,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354869661] [2024-06-14 11:36:34,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:34,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:36:34,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:34,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:36:34,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:36:34,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:34,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:34,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:34,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:34,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:34,917 INFO L124 PetriNetUnfolderBase]: 98/219 cut-off events. [2024-06-14 11:36:34,917 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-14 11:36:34,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 219 events. 98/219 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 840 event pairs, 25 based on Foata normal form. 1/217 useless extension candidates. Maximal degree in co-relation 602. Up to 160 conditions per place. [2024-06-14 11:36:34,919 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 31 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2024-06-14 11:36:34,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 261 flow [2024-06-14 11:36:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:36:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:36:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-14 11:36:34,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:36:34,920 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 129 flow. Second operand 5 states and 96 transitions. [2024-06-14 11:36:34,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 261 flow [2024-06-14 11:36:34,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 245 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:36:34,923 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 166 flow [2024-06-14 11:36:34,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 11:36:34,924 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-14 11:36:34,924 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 166 flow [2024-06-14 11:36:34,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:34,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:34,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:34,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:36:34,925 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:34,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:34,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1526968378, now seen corresponding path program 2 times [2024-06-14 11:36:34,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:34,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062480401] [2024-06-14 11:36:34,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:34,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:35,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:35,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062480401] [2024-06-14 11:36:35,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062480401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:35,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:35,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:36:35,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971485632] [2024-06-14 11:36:35,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:35,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:36:35,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:35,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:36:35,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:36:35,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:35,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:35,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:35,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:35,134 INFO L124 PetriNetUnfolderBase]: 96/214 cut-off events. [2024-06-14 11:36:35,134 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2024-06-14 11:36:35,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 214 events. 96/214 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 825 event pairs, 28 based on Foata normal form. 1/211 useless extension candidates. Maximal degree in co-relation 640. Up to 158 conditions per place. [2024-06-14 11:36:35,136 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 27 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2024-06-14 11:36:35,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 254 flow [2024-06-14 11:36:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:36:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:36:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-14 11:36:35,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-14 11:36:35,137 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 166 flow. Second operand 5 states and 92 transitions. [2024-06-14 11:36:35,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 254 flow [2024-06-14 11:36:35,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 250 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 11:36:35,139 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 187 flow [2024-06-14 11:36:35,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2024-06-14 11:36:35,140 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-06-14 11:36:35,140 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 187 flow [2024-06-14 11:36:35,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:35,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:35,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:36:35,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:35,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash 226717489, now seen corresponding path program 1 times [2024-06-14 11:36:35,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:35,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243582521] [2024-06-14 11:36:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:35,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:35,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:35,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243582521] [2024-06-14 11:36:35,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243582521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:35,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:35,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:35,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496245824] [2024-06-14 11:36:35,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:35,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:35,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:35,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:35,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:35,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:35,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:35,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:35,345 INFO L124 PetriNetUnfolderBase]: 99/224 cut-off events. [2024-06-14 11:36:35,345 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-14 11:36:35,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 224 events. 99/224 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 867 event pairs, 23 based on Foata normal form. 1/223 useless extension candidates. Maximal degree in co-relation 690. Up to 160 conditions per place. [2024-06-14 11:36:35,347 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 37 selfloop transitions, 9 changer transitions 0/52 dead transitions. [2024-06-14 11:36:35,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 319 flow [2024-06-14 11:36:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 11:36:35,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-14 11:36:35,348 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 187 flow. Second operand 6 states and 111 transitions. [2024-06-14 11:36:35,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 319 flow [2024-06-14 11:36:35,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 297 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:35,350 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 200 flow [2024-06-14 11:36:35,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2024-06-14 11:36:35,351 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-06-14 11:36:35,351 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 200 flow [2024-06-14 11:36:35,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:35,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:35,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:36:35,352 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:35,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1042176055, now seen corresponding path program 2 times [2024-06-14 11:36:35,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:35,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560029475] [2024-06-14 11:36:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:35,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:35,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:35,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560029475] [2024-06-14 11:36:35,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560029475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:35,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:35,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:35,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878940212] [2024-06-14 11:36:35,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:35,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:35,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:35,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:35,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:35,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:35,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:35,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:35,525 INFO L124 PetriNetUnfolderBase]: 102/230 cut-off events. [2024-06-14 11:36:35,526 INFO L125 PetriNetUnfolderBase]: For 631/631 co-relation queries the response was YES. [2024-06-14 11:36:35,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 230 events. 102/230 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 890 event pairs, 24 based on Foata normal form. 1/228 useless extension candidates. Maximal degree in co-relation 745. Up to 149 conditions per place. [2024-06-14 11:36:35,527 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 32 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2024-06-14 11:36:35,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 360 flow [2024-06-14 11:36:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 11:36:35,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2024-06-14 11:36:35,529 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 200 flow. Second operand 6 states and 113 transitions. [2024-06-14 11:36:35,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 360 flow [2024-06-14 11:36:35,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 341 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:35,531 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 246 flow [2024-06-14 11:36:35,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2024-06-14 11:36:35,532 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 22 predicate places. [2024-06-14 11:36:35,532 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 246 flow [2024-06-14 11:36:35,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:35,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:35,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:36:35,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:35,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash 69403537, now seen corresponding path program 1 times [2024-06-14 11:36:35,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:35,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316137564] [2024-06-14 11:36:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:35,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:35,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:35,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316137564] [2024-06-14 11:36:35,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316137564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:35,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:35,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:35,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532522618] [2024-06-14 11:36:35,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:35,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:35,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:35,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:35,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:35,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:35,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 246 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:35,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:35,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:35,689 INFO L124 PetriNetUnfolderBase]: 105/236 cut-off events. [2024-06-14 11:36:35,689 INFO L125 PetriNetUnfolderBase]: For 826/826 co-relation queries the response was YES. [2024-06-14 11:36:35,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 236 events. 105/236 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 932 event pairs, 24 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 807. Up to 161 conditions per place. [2024-06-14 11:36:35,691 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 38 selfloop transitions, 14 changer transitions 0/58 dead transitions. [2024-06-14 11:36:35,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 58 transitions, 408 flow [2024-06-14 11:36:35,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 11:36:35,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2024-06-14 11:36:35,692 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 246 flow. Second operand 6 states and 113 transitions. [2024-06-14 11:36:35,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 58 transitions, 408 flow [2024-06-14 11:36:35,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 390 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:35,694 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 281 flow [2024-06-14 11:36:35,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=281, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2024-06-14 11:36:35,695 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 26 predicate places. [2024-06-14 11:36:35,695 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 281 flow [2024-06-14 11:36:35,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:35,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:35,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:36:35,696 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:35,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1268293267, now seen corresponding path program 3 times [2024-06-14 11:36:35,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:35,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801604143] [2024-06-14 11:36:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:35,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:35,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:35,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801604143] [2024-06-14 11:36:35,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801604143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:35,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:35,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:35,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908685567] [2024-06-14 11:36:35,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:35,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:35,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:35,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:35,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:35,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:35,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 281 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:35,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:35,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:35,882 INFO L124 PetriNetUnfolderBase]: 103/229 cut-off events. [2024-06-14 11:36:35,882 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2024-06-14 11:36:35,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 229 events. 103/229 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 906 event pairs, 30 based on Foata normal form. 1/224 useless extension candidates. Maximal degree in co-relation 840. Up to 152 conditions per place. [2024-06-14 11:36:35,885 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 32 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2024-06-14 11:36:35,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 393 flow [2024-06-14 11:36:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 11:36:35,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677083333333334 [2024-06-14 11:36:35,886 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 281 flow. Second operand 6 states and 109 transitions. [2024-06-14 11:36:35,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 393 flow [2024-06-14 11:36:35,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 377 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:35,892 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 302 flow [2024-06-14 11:36:35,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2024-06-14 11:36:35,893 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-14 11:36:35,893 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 302 flow [2024-06-14 11:36:35,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:35,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:35,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:35,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:36:35,894 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:35,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash -2114274415, now seen corresponding path program 2 times [2024-06-14 11:36:35,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:35,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552868810] [2024-06-14 11:36:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:35,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:35,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:35,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552868810] [2024-06-14 11:36:35,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552868810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:35,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:35,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039509917] [2024-06-14 11:36:35,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:35,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:35,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:35,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:36,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:36,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:36,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:36,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:36,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:36,054 INFO L124 PetriNetUnfolderBase]: 106/239 cut-off events. [2024-06-14 11:36:36,054 INFO L125 PetriNetUnfolderBase]: For 1180/1180 co-relation queries the response was YES. [2024-06-14 11:36:36,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 239 events. 106/239 cut-off events. For 1180/1180 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 967 event pairs, 26 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 906. Up to 162 conditions per place. [2024-06-14 11:36:36,056 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 35 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2024-06-14 11:36:36,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 454 flow [2024-06-14 11:36:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 11:36:36,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2024-06-14 11:36:36,057 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 302 flow. Second operand 6 states and 110 transitions. [2024-06-14 11:36:36,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 454 flow [2024-06-14 11:36:36,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 413 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:36,061 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 310 flow [2024-06-14 11:36:36,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2024-06-14 11:36:36,061 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2024-06-14 11:36:36,062 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 310 flow [2024-06-14 11:36:36,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:36,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:36,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:36,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:36:36,062 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:36,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:36,063 INFO L85 PathProgramCache]: Analyzing trace with hash -456485021, now seen corresponding path program 3 times [2024-06-14 11:36:36,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:36,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024047847] [2024-06-14 11:36:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:36,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:36,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:36,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024047847] [2024-06-14 11:36:36,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024047847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:36,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:36,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:36,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440494977] [2024-06-14 11:36:36,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:36,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:36,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:36,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:36,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:36,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:36,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:36,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:36,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:36,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:36,245 INFO L124 PetriNetUnfolderBase]: 104/239 cut-off events. [2024-06-14 11:36:36,246 INFO L125 PetriNetUnfolderBase]: For 1234/1234 co-relation queries the response was YES. [2024-06-14 11:36:36,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 239 events. 104/239 cut-off events. For 1234/1234 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 954 event pairs, 22 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 899. Up to 181 conditions per place. [2024-06-14 11:36:36,247 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 41 selfloop transitions, 9 changer transitions 0/56 dead transitions. [2024-06-14 11:36:36,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 426 flow [2024-06-14 11:36:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 11:36:36,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-14 11:36:36,248 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 310 flow. Second operand 6 states and 105 transitions. [2024-06-14 11:36:36,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 56 transitions, 426 flow [2024-06-14 11:36:36,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 56 transitions, 387 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:36,251 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 294 flow [2024-06-14 11:36:36,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2024-06-14 11:36:36,252 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-06-14 11:36:36,252 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 294 flow [2024-06-14 11:36:36,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:36,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:36,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:36,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:36:36,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:36,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:36,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2105692623, now seen corresponding path program 1 times [2024-06-14 11:36:36,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:36,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723508516] [2024-06-14 11:36:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:36,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:36,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:36,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723508516] [2024-06-14 11:36:36,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723508516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:36,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:36,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:36,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39614310] [2024-06-14 11:36:36,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:36,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:36,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:36,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:36,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:36,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:36,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:36,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:36,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:36,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:36,454 INFO L124 PetriNetUnfolderBase]: 101/234 cut-off events. [2024-06-14 11:36:36,454 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2024-06-14 11:36:36,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 234 events. 101/234 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 927 event pairs, 21 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 857. Up to 173 conditions per place. [2024-06-14 11:36:36,456 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 43 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-14 11:36:36,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 57 transitions, 414 flow [2024-06-14 11:36:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 11:36:36,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 11:36:36,457 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 294 flow. Second operand 6 states and 104 transitions. [2024-06-14 11:36:36,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 57 transitions, 414 flow [2024-06-14 11:36:36,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 377 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:36:36,460 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 277 flow [2024-06-14 11:36:36,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2024-06-14 11:36:36,461 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-14 11:36:36,461 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 277 flow [2024-06-14 11:36:36,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:36,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:36,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:36,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:36:36,462 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:36,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:36,462 INFO L85 PathProgramCache]: Analyzing trace with hash 625380894, now seen corresponding path program 1 times [2024-06-14 11:36:36,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:36,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010192971] [2024-06-14 11:36:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:36,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:36,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:36,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010192971] [2024-06-14 11:36:36,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010192971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:36,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:36,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:36,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939492567] [2024-06-14 11:36:36,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:36,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:36,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:36,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:36,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:36,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:36,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 277 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:36,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:36,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:36,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:36,709 INFO L124 PetriNetUnfolderBase]: 112/255 cut-off events. [2024-06-14 11:36:36,709 INFO L125 PetriNetUnfolderBase]: For 1668/1668 co-relation queries the response was YES. [2024-06-14 11:36:36,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 255 events. 112/255 cut-off events. For 1668/1668 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1042 event pairs, 9 based on Foata normal form. 2/255 useless extension candidates. Maximal degree in co-relation 955. Up to 150 conditions per place. [2024-06-14 11:36:36,711 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 51 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-14 11:36:36,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 487 flow [2024-06-14 11:36:36,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 11:36:36,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-06-14 11:36:36,712 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 277 flow. Second operand 8 states and 142 transitions. [2024-06-14 11:36:36,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 487 flow [2024-06-14 11:36:36,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 469 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:36,716 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 305 flow [2024-06-14 11:36:36,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=305, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2024-06-14 11:36:36,716 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-14 11:36:36,716 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 305 flow [2024-06-14 11:36:36,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:36,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:36,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:36,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:36:36,717 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:36,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:36,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1551087334, now seen corresponding path program 2 times [2024-06-14 11:36:36,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:36,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381790395] [2024-06-14 11:36:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:36,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:36,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:36,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381790395] [2024-06-14 11:36:36,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381790395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:36,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:36,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:36,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400353888] [2024-06-14 11:36:36,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:36,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:36,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:36,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:36,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:36,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:36,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 305 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:36,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:36,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:36,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:36,928 INFO L124 PetriNetUnfolderBase]: 109/250 cut-off events. [2024-06-14 11:36:36,928 INFO L125 PetriNetUnfolderBase]: For 1744/1744 co-relation queries the response was YES. [2024-06-14 11:36:36,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 250 events. 109/250 cut-off events. For 1744/1744 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1013 event pairs, 19 based on Foata normal form. 2/250 useless extension candidates. Maximal degree in co-relation 948. Up to 174 conditions per place. [2024-06-14 11:36:36,930 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 50 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-14 11:36:36,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 461 flow [2024-06-14 11:36:36,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 11:36:36,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:36:36,932 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 305 flow. Second operand 7 states and 126 transitions. [2024-06-14 11:36:36,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 461 flow [2024-06-14 11:36:36,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 437 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:36,935 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 305 flow [2024-06-14 11:36:36,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=305, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2024-06-14 11:36:36,936 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2024-06-14 11:36:36,936 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 305 flow [2024-06-14 11:36:36,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:36,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:36,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:36,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:36:36,937 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:36,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:36,937 INFO L85 PathProgramCache]: Analyzing trace with hash 628242814, now seen corresponding path program 1 times [2024-06-14 11:36:36,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:36,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156650757] [2024-06-14 11:36:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:36,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:37,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:37,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156650757] [2024-06-14 11:36:37,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156650757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:37,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:37,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:37,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723753934] [2024-06-14 11:36:37,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:37,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:37,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:37,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:37,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 305 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:37,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:37,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:37,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:37,113 INFO L124 PetriNetUnfolderBase]: 112/257 cut-off events. [2024-06-14 11:36:37,114 INFO L125 PetriNetUnfolderBase]: For 1828/1828 co-relation queries the response was YES. [2024-06-14 11:36:37,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 257 events. 112/257 cut-off events. For 1828/1828 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1065 event pairs, 18 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 980. Up to 182 conditions per place. [2024-06-14 11:36:37,116 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 50 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-14 11:36:37,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 67 transitions, 475 flow [2024-06-14 11:36:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 11:36:37,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:36:37,153 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 305 flow. Second operand 7 states and 126 transitions. [2024-06-14 11:36:37,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 67 transitions, 475 flow [2024-06-14 11:36:37,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 453 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:37,160 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 328 flow [2024-06-14 11:36:37,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=328, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2024-06-14 11:36:37,160 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-14 11:36:37,160 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 328 flow [2024-06-14 11:36:37,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:37,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:37,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:37,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:36:37,162 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:37,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2100007986, now seen corresponding path program 3 times [2024-06-14 11:36:37,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:37,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338542546] [2024-06-14 11:36:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:37,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:37,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:37,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338542546] [2024-06-14 11:36:37,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338542546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:37,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:37,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:37,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370041197] [2024-06-14 11:36:37,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:37,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:37,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:37,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:37,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:37,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:37,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:37,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:37,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:37,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:37,362 INFO L124 PetriNetUnfolderBase]: 116/264 cut-off events. [2024-06-14 11:36:37,362 INFO L125 PetriNetUnfolderBase]: For 2202/2202 co-relation queries the response was YES. [2024-06-14 11:36:37,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1076 conditions, 264 events. 116/264 cut-off events. For 2202/2202 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1090 event pairs, 19 based on Foata normal form. 2/263 useless extension candidates. Maximal degree in co-relation 1041. Up to 172 conditions per place. [2024-06-14 11:36:37,364 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 43 selfloop transitions, 17 changer transitions 0/66 dead transitions. [2024-06-14 11:36:37,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 486 flow [2024-06-14 11:36:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 11:36:37,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669642857142857 [2024-06-14 11:36:37,365 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 328 flow. Second operand 7 states and 127 transitions. [2024-06-14 11:36:37,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 486 flow [2024-06-14 11:36:37,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 66 transitions, 457 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:37,369 INFO L231 Difference]: Finished difference. Result has 73 places, 54 transitions, 349 flow [2024-06-14 11:36:37,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=73, PETRI_TRANSITIONS=54} [2024-06-14 11:36:37,369 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2024-06-14 11:36:37,369 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 54 transitions, 349 flow [2024-06-14 11:36:37,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:37,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:37,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:37,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:36:37,370 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:37,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2100012946, now seen corresponding path program 2 times [2024-06-14 11:36:37,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:37,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74460063] [2024-06-14 11:36:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:37,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:37,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:37,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74460063] [2024-06-14 11:36:37,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74460063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:37,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:37,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:37,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667041217] [2024-06-14 11:36:37,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:37,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:37,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:37,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:37,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:37,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:37,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 54 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:37,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:37,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:37,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:37,556 INFO L124 PetriNetUnfolderBase]: 124/280 cut-off events. [2024-06-14 11:36:37,556 INFO L125 PetriNetUnfolderBase]: For 2535/2535 co-relation queries the response was YES. [2024-06-14 11:36:37,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 280 events. 124/280 cut-off events. For 2535/2535 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1203 event pairs, 20 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 1148. Up to 161 conditions per place. [2024-06-14 11:36:37,558 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 42 selfloop transitions, 25 changer transitions 0/73 dead transitions. [2024-06-14 11:36:37,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 635 flow [2024-06-14 11:36:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 11:36:37,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-14 11:36:37,559 INFO L175 Difference]: Start difference. First operand has 73 places, 54 transitions, 349 flow. Second operand 7 states and 133 transitions. [2024-06-14 11:36:37,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 635 flow [2024-06-14 11:36:37,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 595 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:37,564 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 422 flow [2024-06-14 11:36:37,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=422, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2024-06-14 11:36:37,564 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-14 11:36:37,564 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 422 flow [2024-06-14 11:36:37,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:37,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:37,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:37,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:36:37,565 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:37,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:37,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2100192436, now seen corresponding path program 3 times [2024-06-14 11:36:37,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:37,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455550266] [2024-06-14 11:36:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:37,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:37,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:37,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455550266] [2024-06-14 11:36:37,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455550266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:37,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:37,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893137064] [2024-06-14 11:36:37,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:37,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:37,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:37,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:37,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 422 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:37,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:37,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:37,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:37,766 INFO L124 PetriNetUnfolderBase]: 122/277 cut-off events. [2024-06-14 11:36:37,766 INFO L125 PetriNetUnfolderBase]: For 2681/2681 co-relation queries the response was YES. [2024-06-14 11:36:37,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 277 events. 122/277 cut-off events. For 2681/2681 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1184 event pairs, 20 based on Foata normal form. 1/274 useless extension candidates. Maximal degree in co-relation 1149. Up to 159 conditions per place. [2024-06-14 11:36:37,768 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 40 selfloop transitions, 26 changer transitions 0/72 dead transitions. [2024-06-14 11:36:37,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 618 flow [2024-06-14 11:36:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 11:36:37,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5848214285714286 [2024-06-14 11:36:37,771 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 422 flow. Second operand 7 states and 131 transitions. [2024-06-14 11:36:37,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 618 flow [2024-06-14 11:36:37,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 579 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:37,777 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 440 flow [2024-06-14 11:36:37,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=440, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-06-14 11:36:37,777 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2024-06-14 11:36:37,777 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 440 flow [2024-06-14 11:36:37,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:37,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:37,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:37,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:36:37,778 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:37,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:37,778 INFO L85 PathProgramCache]: Analyzing trace with hash 915848286, now seen corresponding path program 1 times [2024-06-14 11:36:37,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:37,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805848476] [2024-06-14 11:36:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:37,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:37,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:37,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805848476] [2024-06-14 11:36:37,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805848476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:37,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:37,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:37,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5597619] [2024-06-14 11:36:37,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:37,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:37,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:37,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:37,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:37,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:37,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 440 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:37,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:37,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:37,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:37,975 INFO L124 PetriNetUnfolderBase]: 126/285 cut-off events. [2024-06-14 11:36:37,975 INFO L125 PetriNetUnfolderBase]: For 3170/3170 co-relation queries the response was YES. [2024-06-14 11:36:37,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 285 events. 126/285 cut-off events. For 3170/3170 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1246 event pairs, 20 based on Foata normal form. 2/283 useless extension candidates. Maximal degree in co-relation 1218. Up to 196 conditions per place. [2024-06-14 11:36:37,977 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 50 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-14 11:36:37,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 73 transitions, 608 flow [2024-06-14 11:36:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 11:36:37,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669642857142857 [2024-06-14 11:36:37,978 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 440 flow. Second operand 7 states and 127 transitions. [2024-06-14 11:36:37,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 73 transitions, 608 flow [2024-06-14 11:36:37,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 73 transitions, 551 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:37,987 INFO L231 Difference]: Finished difference. Result has 81 places, 61 transitions, 429 flow [2024-06-14 11:36:37,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=81, PETRI_TRANSITIONS=61} [2024-06-14 11:36:37,987 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-14 11:36:37,987 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 61 transitions, 429 flow [2024-06-14 11:36:37,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:37,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:37,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:37,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:36:37,988 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:37,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:37,988 INFO L85 PathProgramCache]: Analyzing trace with hash -940851790, now seen corresponding path program 4 times [2024-06-14 11:36:37,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:37,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365322711] [2024-06-14 11:36:37,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:37,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:38,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:38,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365322711] [2024-06-14 11:36:38,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365322711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:38,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:38,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:38,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019319961] [2024-06-14 11:36:38,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:38,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:38,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:38,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:38,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:38,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:38,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 61 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:38,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:38,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:38,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:38,200 INFO L124 PetriNetUnfolderBase]: 123/276 cut-off events. [2024-06-14 11:36:38,200 INFO L125 PetriNetUnfolderBase]: For 3009/3009 co-relation queries the response was YES. [2024-06-14 11:36:38,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 276 events. 123/276 cut-off events. For 3009/3009 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1193 event pairs, 25 based on Foata normal form. 2/272 useless extension candidates. Maximal degree in co-relation 1155. Up to 185 conditions per place. [2024-06-14 11:36:38,202 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 47 selfloop transitions, 17 changer transitions 0/70 dead transitions. [2024-06-14 11:36:38,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 70 transitions, 577 flow [2024-06-14 11:36:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 11:36:38,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 11:36:38,203 INFO L175 Difference]: Start difference. First operand has 81 places, 61 transitions, 429 flow. Second operand 7 states and 124 transitions. [2024-06-14 11:36:38,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 70 transitions, 577 flow [2024-06-14 11:36:38,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 541 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:38,209 INFO L231 Difference]: Finished difference. Result has 83 places, 61 transitions, 431 flow [2024-06-14 11:36:38,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=83, PETRI_TRANSITIONS=61} [2024-06-14 11:36:38,210 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-14 11:36:38,210 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 61 transitions, 431 flow [2024-06-14 11:36:38,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:38,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:38,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:38,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:36:38,211 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:38,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:38,211 INFO L85 PathProgramCache]: Analyzing trace with hash -936571886, now seen corresponding path program 4 times [2024-06-14 11:36:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:38,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162616404] [2024-06-14 11:36:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:38,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:38,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:38,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162616404] [2024-06-14 11:36:38,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162616404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:38,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:38,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:38,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042362463] [2024-06-14 11:36:38,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:38,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:38,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:38,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:38,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:38,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 61 transitions, 431 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:38,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:38,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:38,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:38,372 INFO L124 PetriNetUnfolderBase]: 131/293 cut-off events. [2024-06-14 11:36:38,372 INFO L125 PetriNetUnfolderBase]: For 3350/3350 co-relation queries the response was YES. [2024-06-14 11:36:38,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 293 events. 131/293 cut-off events. For 3350/3350 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1307 event pairs, 25 based on Foata normal form. 1/288 useless extension candidates. Maximal degree in co-relation 1257. Up to 172 conditions per place. [2024-06-14 11:36:38,375 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 40 selfloop transitions, 29 changer transitions 0/75 dead transitions. [2024-06-14 11:36:38,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 719 flow [2024-06-14 11:36:38,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 11:36:38,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-14 11:36:38,376 INFO L175 Difference]: Start difference. First operand has 83 places, 61 transitions, 431 flow. Second operand 7 states and 130 transitions. [2024-06-14 11:36:38,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 719 flow [2024-06-14 11:36:38,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 671 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:38,383 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 490 flow [2024-06-14 11:36:38,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=490, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2024-06-14 11:36:38,384 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-14 11:36:38,384 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 490 flow [2024-06-14 11:36:38,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:38,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:38,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:38,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:36:38,385 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:38,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash -936809036, now seen corresponding path program 5 times [2024-06-14 11:36:38,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:38,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76280708] [2024-06-14 11:36:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:38,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:38,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:38,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76280708] [2024-06-14 11:36:38,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76280708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:38,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:38,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:38,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900968822] [2024-06-14 11:36:38,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:38,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:38,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:38,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:38,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:38,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:38,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 490 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:38,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:38,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:38,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:38,538 INFO L124 PetriNetUnfolderBase]: 129/290 cut-off events. [2024-06-14 11:36:38,539 INFO L125 PetriNetUnfolderBase]: For 3394/3394 co-relation queries the response was YES. [2024-06-14 11:36:38,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1269 conditions, 290 events. 129/290 cut-off events. For 3394/3394 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1290 event pairs, 25 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1228. Up to 170 conditions per place. [2024-06-14 11:36:38,541 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 38 selfloop transitions, 30 changer transitions 0/74 dead transitions. [2024-06-14 11:36:38,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 690 flow [2024-06-14 11:36:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 11:36:38,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:36:38,542 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 490 flow. Second operand 7 states and 128 transitions. [2024-06-14 11:36:38,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 690 flow [2024-06-14 11:36:38,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 74 transitions, 597 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:38,550 INFO L231 Difference]: Finished difference. Result has 86 places, 65 transitions, 462 flow [2024-06-14 11:36:38,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=462, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2024-06-14 11:36:38,551 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-14 11:36:38,551 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 462 flow [2024-06-14 11:36:38,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:38,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:38,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:38,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:36:38,552 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:38,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash -651472016, now seen corresponding path program 6 times [2024-06-14 11:36:38,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:38,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35238441] [2024-06-14 11:36:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:38,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:38,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35238441] [2024-06-14 11:36:38,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35238441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:38,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:38,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:38,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628986736] [2024-06-14 11:36:38,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:38,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:38,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:38,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:38,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:38,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:38,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 462 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:38,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:38,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:38,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:38,729 INFO L124 PetriNetUnfolderBase]: 127/293 cut-off events. [2024-06-14 11:36:38,729 INFO L125 PetriNetUnfolderBase]: For 3237/3237 co-relation queries the response was YES. [2024-06-14 11:36:38,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 293 events. 127/293 cut-off events. For 3237/3237 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1285 event pairs, 17 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1159. Up to 222 conditions per place. [2024-06-14 11:36:38,731 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 56 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-14 11:36:38,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 73 transitions, 614 flow [2024-06-14 11:36:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 11:36:38,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 11:36:38,732 INFO L175 Difference]: Start difference. First operand has 86 places, 65 transitions, 462 flow. Second operand 7 states and 120 transitions. [2024-06-14 11:36:38,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 73 transitions, 614 flow [2024-06-14 11:36:38,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 73 transitions, 546 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:38,740 INFO L231 Difference]: Finished difference. Result has 88 places, 65 transitions, 421 flow [2024-06-14 11:36:38,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=88, PETRI_TRANSITIONS=65} [2024-06-14 11:36:38,740 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-06-14 11:36:38,740 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 65 transitions, 421 flow [2024-06-14 11:36:38,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:38,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:38,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:38,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:36:38,741 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:38,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash -298144176, now seen corresponding path program 2 times [2024-06-14 11:36:38,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:38,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941569525] [2024-06-14 11:36:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:38,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:38,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941569525] [2024-06-14 11:36:38,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941569525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:38,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:38,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:38,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841648384] [2024-06-14 11:36:38,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:38,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:38,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:38,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:38,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:38,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:38,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 65 transitions, 421 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:38,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:38,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:38,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:38,927 INFO L124 PetriNetUnfolderBase]: 131/298 cut-off events. [2024-06-14 11:36:38,927 INFO L125 PetriNetUnfolderBase]: For 3710/3710 co-relation queries the response was YES. [2024-06-14 11:36:38,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 298 events. 131/298 cut-off events. For 3710/3710 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1315 event pairs, 21 based on Foata normal form. 2/296 useless extension candidates. Maximal degree in co-relation 1146. Up to 206 conditions per place. [2024-06-14 11:36:38,930 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 52 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2024-06-14 11:36:38,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 75 transitions, 585 flow [2024-06-14 11:36:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 11:36:38,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 11:36:38,931 INFO L175 Difference]: Start difference. First operand has 88 places, 65 transitions, 421 flow. Second operand 7 states and 124 transitions. [2024-06-14 11:36:38,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 75 transitions, 585 flow [2024-06-14 11:36:38,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 75 transitions, 536 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 11:36:38,940 INFO L231 Difference]: Finished difference. Result has 87 places, 66 transitions, 418 flow [2024-06-14 11:36:38,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=418, PETRI_PLACES=87, PETRI_TRANSITIONS=66} [2024-06-14 11:36:38,941 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-14 11:36:38,941 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 66 transitions, 418 flow [2024-06-14 11:36:38,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:38,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:38,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:38,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:36:38,941 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:38,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:38,942 INFO L85 PathProgramCache]: Analyzing trace with hash -651463088, now seen corresponding path program 3 times [2024-06-14 11:36:38,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:38,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102953556] [2024-06-14 11:36:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:38,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:39,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:39,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102953556] [2024-06-14 11:36:39,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102953556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:39,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:39,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:39,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560576058] [2024-06-14 11:36:39,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:39,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:39,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:39,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:39,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 66 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:39,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:39,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:39,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:39,137 INFO L124 PetriNetUnfolderBase]: 135/313 cut-off events. [2024-06-14 11:36:39,138 INFO L125 PetriNetUnfolderBase]: For 3995/3995 co-relation queries the response was YES. [2024-06-14 11:36:39,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 313 events. 135/313 cut-off events. For 3995/3995 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1411 event pairs, 19 based on Foata normal form. 2/313 useless extension candidates. Maximal degree in co-relation 1182. Up to 235 conditions per place. [2024-06-14 11:36:39,140 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 60 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-14 11:36:39,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 76 transitions, 586 flow [2024-06-14 11:36:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 11:36:39,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 11:36:39,141 INFO L175 Difference]: Start difference. First operand has 87 places, 66 transitions, 418 flow. Second operand 7 states and 120 transitions. [2024-06-14 11:36:39,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 76 transitions, 586 flow [2024-06-14 11:36:39,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 76 transitions, 550 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:39,150 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 416 flow [2024-06-14 11:36:39,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-06-14 11:36:39,150 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-14 11:36:39,151 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 416 flow [2024-06-14 11:36:39,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:39,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:39,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:39,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:36:39,151 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:39,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash -640987568, now seen corresponding path program 4 times [2024-06-14 11:36:39,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:39,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301519563] [2024-06-14 11:36:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:39,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:39,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:39,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301519563] [2024-06-14 11:36:39,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301519563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:39,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:39,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:39,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118994567] [2024-06-14 11:36:39,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:39,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:39,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:39,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:39,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:39,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:39,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:39,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:39,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:39,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:39,372 INFO L124 PetriNetUnfolderBase]: 132/308 cut-off events. [2024-06-14 11:36:39,372 INFO L125 PetriNetUnfolderBase]: For 3612/3612 co-relation queries the response was YES. [2024-06-14 11:36:39,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 308 events. 132/308 cut-off events. For 3612/3612 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1387 event pairs, 16 based on Foata normal form. 2/308 useless extension candidates. Maximal degree in co-relation 1112. Up to 216 conditions per place. [2024-06-14 11:36:39,374 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 60 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-14 11:36:39,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 78 transitions, 584 flow [2024-06-14 11:36:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 11:36:39,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52734375 [2024-06-14 11:36:39,375 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 416 flow. Second operand 8 states and 135 transitions. [2024-06-14 11:36:39,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 78 transitions, 584 flow [2024-06-14 11:36:39,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 78 transitions, 560 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:39,385 INFO L231 Difference]: Finished difference. Result has 92 places, 67 transitions, 420 flow [2024-06-14 11:36:39,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=420, PETRI_PLACES=92, PETRI_TRANSITIONS=67} [2024-06-14 11:36:39,385 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 61 predicate places. [2024-06-14 11:36:39,385 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 67 transitions, 420 flow [2024-06-14 11:36:39,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-14 11:36:39,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:39,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:39,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:36:39,386 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:39,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:39,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1896845135, now seen corresponding path program 1 times [2024-06-14 11:36:39,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:39,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715522272] [2024-06-14 11:36:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:39,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:39,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:39,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715522272] [2024-06-14 11:36:39,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715522272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:39,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:39,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:39,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606274110] [2024-06-14 11:36:39,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:39,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:39,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:39,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:39,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:39,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 67 transitions, 420 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:39,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:39,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:39,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:39,639 INFO L124 PetriNetUnfolderBase]: 162/376 cut-off events. [2024-06-14 11:36:39,640 INFO L125 PetriNetUnfolderBase]: For 8267/8267 co-relation queries the response was YES. [2024-06-14 11:36:39,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1580 conditions, 376 events. 162/376 cut-off events. For 8267/8267 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1787 event pairs, 28 based on Foata normal form. 6/380 useless extension candidates. Maximal degree in co-relation 1536. Up to 177 conditions per place. [2024-06-14 11:36:39,642 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 65 selfloop transitions, 9 changer transitions 12/92 dead transitions. [2024-06-14 11:36:39,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 92 transitions, 726 flow [2024-06-14 11:36:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:36:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:36:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 11:36:39,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:36:39,643 INFO L175 Difference]: Start difference. First operand has 92 places, 67 transitions, 420 flow. Second operand 9 states and 162 transitions. [2024-06-14 11:36:39,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 92 transitions, 726 flow [2024-06-14 11:36:39,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 696 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:39,657 INFO L231 Difference]: Finished difference. Result has 95 places, 64 transitions, 393 flow [2024-06-14 11:36:39,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=393, PETRI_PLACES=95, PETRI_TRANSITIONS=64} [2024-06-14 11:36:39,657 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 64 predicate places. [2024-06-14 11:36:39,657 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 64 transitions, 393 flow [2024-06-14 11:36:39,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:39,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:39,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:39,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:36:39,658 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:39,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:39,658 INFO L85 PathProgramCache]: Analyzing trace with hash 352000369, now seen corresponding path program 2 times [2024-06-14 11:36:39,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:39,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924716379] [2024-06-14 11:36:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:39,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:39,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924716379] [2024-06-14 11:36:39,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924716379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:39,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:39,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:39,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165641020] [2024-06-14 11:36:39,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:39,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:39,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:39,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:39,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:39,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:39,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 64 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:39,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:39,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:39,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:39,935 INFO L124 PetriNetUnfolderBase]: 146/340 cut-off events. [2024-06-14 11:36:39,936 INFO L125 PetriNetUnfolderBase]: For 8785/8785 co-relation queries the response was YES. [2024-06-14 11:36:39,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 340 events. 146/340 cut-off events. For 8785/8785 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1579 event pairs, 26 based on Foata normal form. 6/344 useless extension candidates. Maximal degree in co-relation 1434. Up to 177 conditions per place. [2024-06-14 11:36:39,938 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 64 selfloop transitions, 8 changer transitions 6/84 dead transitions. [2024-06-14 11:36:39,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 84 transitions, 673 flow [2024-06-14 11:36:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 11:36:39,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-06-14 11:36:39,940 INFO L175 Difference]: Start difference. First operand has 95 places, 64 transitions, 393 flow. Second operand 8 states and 142 transitions. [2024-06-14 11:36:39,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 84 transitions, 673 flow [2024-06-14 11:36:39,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 84 transitions, 629 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 11:36:39,955 INFO L231 Difference]: Finished difference. Result has 90 places, 62 transitions, 365 flow [2024-06-14 11:36:39,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=365, PETRI_PLACES=90, PETRI_TRANSITIONS=62} [2024-06-14 11:36:39,956 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2024-06-14 11:36:39,956 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 62 transitions, 365 flow [2024-06-14 11:36:39,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:39,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:39,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:39,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:36:39,957 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:39,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:39,957 INFO L85 PathProgramCache]: Analyzing trace with hash 352177999, now seen corresponding path program 3 times [2024-06-14 11:36:39,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:39,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084451885] [2024-06-14 11:36:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:39,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:40,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:40,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084451885] [2024-06-14 11:36:40,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084451885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:40,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:40,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:40,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815776719] [2024-06-14 11:36:40,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:40,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:40,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:40,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:40,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:40,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:40,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 62 transitions, 365 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:40,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:40,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:40,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:40,223 INFO L124 PetriNetUnfolderBase]: 122/288 cut-off events. [2024-06-14 11:36:40,223 INFO L125 PetriNetUnfolderBase]: For 5628/5628 co-relation queries the response was YES. [2024-06-14 11:36:40,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063 conditions, 288 events. 122/288 cut-off events. For 5628/5628 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1268 event pairs, 18 based on Foata normal form. 8/294 useless extension candidates. Maximal degree in co-relation 1021. Up to 177 conditions per place. [2024-06-14 11:36:40,225 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 52 selfloop transitions, 4 changer transitions 16/78 dead transitions. [2024-06-14 11:36:40,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 78 transitions, 559 flow [2024-06-14 11:36:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 11:36:40,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53515625 [2024-06-14 11:36:40,226 INFO L175 Difference]: Start difference. First operand has 90 places, 62 transitions, 365 flow. Second operand 8 states and 137 transitions. [2024-06-14 11:36:40,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 78 transitions, 559 flow [2024-06-14 11:36:40,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 78 transitions, 541 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:36:40,234 INFO L231 Difference]: Finished difference. Result has 89 places, 57 transitions, 327 flow [2024-06-14 11:36:40,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=89, PETRI_TRANSITIONS=57} [2024-06-14 11:36:40,234 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-14 11:36:40,235 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 57 transitions, 327 flow [2024-06-14 11:36:40,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:40,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:40,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:40,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:36:40,235 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:40,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash -522157327, now seen corresponding path program 4 times [2024-06-14 11:36:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875909490] [2024-06-14 11:36:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:40,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:40,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:40,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875909490] [2024-06-14 11:36:40,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875909490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:40,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:40,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:40,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314131587] [2024-06-14 11:36:40,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:40,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:40,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:40,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:40,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:40,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 57 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:40,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:40,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:40,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:40,434 INFO L124 PetriNetUnfolderBase]: 112/260 cut-off events. [2024-06-14 11:36:40,434 INFO L125 PetriNetUnfolderBase]: For 5260/5260 co-relation queries the response was YES. [2024-06-14 11:36:40,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 260 events. 112/260 cut-off events. For 5260/5260 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1132 event pairs, 22 based on Foata normal form. 8/264 useless extension candidates. Maximal degree in co-relation 928. Up to 131 conditions per place. [2024-06-14 11:36:40,436 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 34 selfloop transitions, 21 changer transitions 9/70 dead transitions. [2024-06-14 11:36:40,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 70 transitions, 497 flow [2024-06-14 11:36:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 11:36:40,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55859375 [2024-06-14 11:36:40,437 INFO L175 Difference]: Start difference. First operand has 89 places, 57 transitions, 327 flow. Second operand 8 states and 143 transitions. [2024-06-14 11:36:40,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 70 transitions, 497 flow [2024-06-14 11:36:40,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 481 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:40,443 INFO L231 Difference]: Finished difference. Result has 83 places, 54 transitions, 341 flow [2024-06-14 11:36:40,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=341, PETRI_PLACES=83, PETRI_TRANSITIONS=54} [2024-06-14 11:36:40,444 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-14 11:36:40,444 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 54 transitions, 341 flow [2024-06-14 11:36:40,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:40,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:40,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:40,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:36:40,445 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:40,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash -256917135, now seen corresponding path program 5 times [2024-06-14 11:36:40,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:40,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397228437] [2024-06-14 11:36:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:40,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:40,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397228437] [2024-06-14 11:36:40,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397228437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:40,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:40,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:40,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306830049] [2024-06-14 11:36:40,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:40,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:40,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:40,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:40,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 54 transitions, 341 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:40,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:40,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:40,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:40,682 INFO L124 PetriNetUnfolderBase]: 125/295 cut-off events. [2024-06-14 11:36:40,682 INFO L125 PetriNetUnfolderBase]: For 6464/6464 co-relation queries the response was YES. [2024-06-14 11:36:40,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 295 events. 125/295 cut-off events. For 6464/6464 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1327 event pairs, 30 based on Foata normal form. 6/297 useless extension candidates. Maximal degree in co-relation 1214. Up to 117 conditions per place. [2024-06-14 11:36:40,684 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 39 selfloop transitions, 19 changer transitions 7/71 dead transitions. [2024-06-14 11:36:40,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 71 transitions, 573 flow [2024-06-14 11:36:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 11:36:40,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56640625 [2024-06-14 11:36:40,686 INFO L175 Difference]: Start difference. First operand has 83 places, 54 transitions, 341 flow. Second operand 8 states and 145 transitions. [2024-06-14 11:36:40,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 71 transitions, 573 flow [2024-06-14 11:36:40,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 71 transitions, 523 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:36:40,695 INFO L231 Difference]: Finished difference. Result has 81 places, 51 transitions, 318 flow [2024-06-14 11:36:40,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=318, PETRI_PLACES=81, PETRI_TRANSITIONS=51} [2024-06-14 11:36:40,696 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-14 11:36:40,696 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 51 transitions, 318 flow [2024-06-14 11:36:40,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:40,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:40,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:40,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:36:40,697 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:40,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:40,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1854556783, now seen corresponding path program 1 times [2024-06-14 11:36:40,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:40,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124404546] [2024-06-14 11:36:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:40,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:40,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124404546] [2024-06-14 11:36:40,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124404546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:40,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:40,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:40,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949208921] [2024-06-14 11:36:40,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:40,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:40,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:40,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:40,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:40,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 51 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:40,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:40,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:40,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:40,895 INFO L124 PetriNetUnfolderBase]: 100/238 cut-off events. [2024-06-14 11:36:40,895 INFO L125 PetriNetUnfolderBase]: For 4391/4391 co-relation queries the response was YES. [2024-06-14 11:36:40,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 238 events. 100/238 cut-off events. For 4391/4391 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 973 event pairs, 22 based on Foata normal form. 8/242 useless extension candidates. Maximal degree in co-relation 864. Up to 117 conditions per place. [2024-06-14 11:36:40,897 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 32 selfloop transitions, 17 changer transitions 9/64 dead transitions. [2024-06-14 11:36:40,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 64 transitions, 474 flow [2024-06-14 11:36:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 11:36:40,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-14 11:36:40,898 INFO L175 Difference]: Start difference. First operand has 81 places, 51 transitions, 318 flow. Second operand 8 states and 140 transitions. [2024-06-14 11:36:40,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 64 transitions, 474 flow [2024-06-14 11:36:40,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 64 transitions, 432 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:36:40,907 INFO L231 Difference]: Finished difference. Result has 78 places, 48 transitions, 294 flow [2024-06-14 11:36:40,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=78, PETRI_TRANSITIONS=48} [2024-06-14 11:36:40,907 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2024-06-14 11:36:40,907 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 48 transitions, 294 flow [2024-06-14 11:36:40,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:40,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:40,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:36:40,908 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:40,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1863127663, now seen corresponding path program 2 times [2024-06-14 11:36:40,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:40,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826026409] [2024-06-14 11:36:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:41,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:41,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826026409] [2024-06-14 11:36:41,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826026409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:41,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:41,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:41,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069513502] [2024-06-14 11:36:41,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:41,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:41,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:41,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:41,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:41,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:41,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 48 transitions, 294 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:41,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:41,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:41,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:41,117 INFO L124 PetriNetUnfolderBase]: 91/221 cut-off events. [2024-06-14 11:36:41,117 INFO L125 PetriNetUnfolderBase]: For 3232/3232 co-relation queries the response was YES. [2024-06-14 11:36:41,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 221 events. 91/221 cut-off events. For 3232/3232 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 877 event pairs, 16 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 788. Up to 107 conditions per place. [2024-06-14 11:36:41,118 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 26 selfloop transitions, 13 changer transitions 16/61 dead transitions. [2024-06-14 11:36:41,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 61 transitions, 438 flow [2024-06-14 11:36:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 11:36:41,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390625 [2024-06-14 11:36:41,119 INFO L175 Difference]: Start difference. First operand has 78 places, 48 transitions, 294 flow. Second operand 8 states and 138 transitions. [2024-06-14 11:36:41,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 61 transitions, 438 flow [2024-06-14 11:36:41,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 61 transitions, 400 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:36:41,123 INFO L231 Difference]: Finished difference. Result has 75 places, 43 transitions, 255 flow [2024-06-14 11:36:41,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=255, PETRI_PLACES=75, PETRI_TRANSITIONS=43} [2024-06-14 11:36:41,124 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-14 11:36:41,124 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 43 transitions, 255 flow [2024-06-14 11:36:41,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:41,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:41,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:41,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:36:41,124 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:41,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:41,124 INFO L85 PathProgramCache]: Analyzing trace with hash -99344495, now seen corresponding path program 3 times [2024-06-14 11:36:41,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:41,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420036357] [2024-06-14 11:36:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:41,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:41,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:41,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420036357] [2024-06-14 11:36:41,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420036357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:41,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:41,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:41,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796993107] [2024-06-14 11:36:41,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:41,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:41,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:41,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:41,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:41,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:41,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 43 transitions, 255 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:41,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:41,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:41,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:41,303 INFO L124 PetriNetUnfolderBase]: 83/197 cut-off events. [2024-06-14 11:36:41,303 INFO L125 PetriNetUnfolderBase]: For 3304/3304 co-relation queries the response was YES. [2024-06-14 11:36:41,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 197 events. 83/197 cut-off events. For 3304/3304 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 750 event pairs, 20 based on Foata normal form. 8/204 useless extension candidates. Maximal degree in co-relation 710. Up to 103 conditions per place. [2024-06-14 11:36:41,304 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 24 selfloop transitions, 14 changer transitions 9/53 dead transitions. [2024-06-14 11:36:41,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 53 transitions, 381 flow [2024-06-14 11:36:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 11:36:41,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-14 11:36:41,305 INFO L175 Difference]: Start difference. First operand has 75 places, 43 transitions, 255 flow. Second operand 8 states and 136 transitions. [2024-06-14 11:36:41,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 53 transitions, 381 flow [2024-06-14 11:36:41,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 53 transitions, 339 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 11:36:41,308 INFO L231 Difference]: Finished difference. Result has 66 places, 40 transitions, 229 flow [2024-06-14 11:36:41,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=229, PETRI_PLACES=66, PETRI_TRANSITIONS=40} [2024-06-14 11:36:41,308 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 35 predicate places. [2024-06-14 11:36:41,309 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 40 transitions, 229 flow [2024-06-14 11:36:41,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:41,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:41,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:41,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:36:41,309 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:41,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:41,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1246284399, now seen corresponding path program 4 times [2024-06-14 11:36:41,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:41,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222023046] [2024-06-14 11:36:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:41,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:41,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:41,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222023046] [2024-06-14 11:36:41,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222023046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:41,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:41,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:41,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004873969] [2024-06-14 11:36:41,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:41,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:41,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:41,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:41,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:41,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:41,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 40 transitions, 229 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:41,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:41,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:41,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:41,528 INFO L124 PetriNetUnfolderBase]: 96/232 cut-off events. [2024-06-14 11:36:41,529 INFO L125 PetriNetUnfolderBase]: For 2974/2974 co-relation queries the response was YES. [2024-06-14 11:36:41,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 232 events. 96/232 cut-off events. For 2974/2974 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 980 event pairs, 30 based on Foata normal form. 6/237 useless extension candidates. Maximal degree in co-relation 870. Up to 89 conditions per place. [2024-06-14 11:36:41,530 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 29 selfloop transitions, 12 changer transitions 7/54 dead transitions. [2024-06-14 11:36:41,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 54 transitions, 399 flow [2024-06-14 11:36:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 11:36:41,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390625 [2024-06-14 11:36:41,531 INFO L175 Difference]: Start difference. First operand has 66 places, 40 transitions, 229 flow. Second operand 8 states and 138 transitions. [2024-06-14 11:36:41,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 54 transitions, 399 flow [2024-06-14 11:36:41,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 54 transitions, 363 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:36:41,534 INFO L231 Difference]: Finished difference. Result has 64 places, 37 transitions, 206 flow [2024-06-14 11:36:41,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=64, PETRI_TRANSITIONS=37} [2024-06-14 11:36:41,535 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-06-14 11:36:41,535 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 37 transitions, 206 flow [2024-06-14 11:36:41,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:41,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:41,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:41,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:36:41,535 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:41,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash -873575825, now seen corresponding path program 5 times [2024-06-14 11:36:41,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:41,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342994925] [2024-06-14 11:36:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:41,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:41,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:41,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342994925] [2024-06-14 11:36:41,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342994925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:41,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:41,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:41,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892559165] [2024-06-14 11:36:41,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:41,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:41,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:41,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:41,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:41,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 37 transitions, 206 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:41,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:41,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:41,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:41,703 INFO L124 PetriNetUnfolderBase]: 71/175 cut-off events. [2024-06-14 11:36:41,703 INFO L125 PetriNetUnfolderBase]: For 1943/1943 co-relation queries the response was YES. [2024-06-14 11:36:41,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 175 events. 71/175 cut-off events. For 1943/1943 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 658 event pairs, 22 based on Foata normal form. 8/182 useless extension candidates. Maximal degree in co-relation 590. Up to 89 conditions per place. [2024-06-14 11:36:41,704 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 21 selfloop transitions, 11 changer transitions 9/47 dead transitions. [2024-06-14 11:36:41,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 47 transitions, 318 flow [2024-06-14 11:36:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 11:36:41,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-06-14 11:36:41,705 INFO L175 Difference]: Start difference. First operand has 64 places, 37 transitions, 206 flow. Second operand 8 states and 134 transitions. [2024-06-14 11:36:41,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 47 transitions, 318 flow [2024-06-14 11:36:41,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 47 transitions, 290 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:36:41,707 INFO L231 Difference]: Finished difference. Result has 61 places, 34 transitions, 184 flow [2024-06-14 11:36:41,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=61, PETRI_TRANSITIONS=34} [2024-06-14 11:36:41,708 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-14 11:36:41,708 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 34 transitions, 184 flow [2024-06-14 11:36:41,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:41,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:41,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:41,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:36:41,708 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:41,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1669501621, now seen corresponding path program 6 times [2024-06-14 11:36:41,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:41,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79323101] [2024-06-14 11:36:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:41,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:41,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:41,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79323101] [2024-06-14 11:36:41,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79323101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:41,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:41,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973074366] [2024-06-14 11:36:41,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:41,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:41,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:41,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:41,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:41,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 34 transitions, 184 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:41,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:41,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:41,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:41,895 INFO L124 PetriNetUnfolderBase]: 77/193 cut-off events. [2024-06-14 11:36:41,895 INFO L125 PetriNetUnfolderBase]: For 1809/1809 co-relation queries the response was YES. [2024-06-14 11:36:41,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 193 events. 77/193 cut-off events. For 1809/1809 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 733 event pairs, 27 based on Foata normal form. 6/198 useless extension candidates. Maximal degree in co-relation 678. Up to 62 conditions per place. [2024-06-14 11:36:41,896 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 25 selfloop transitions, 8 changer transitions 8/47 dead transitions. [2024-06-14 11:36:41,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 47 transitions, 328 flow [2024-06-14 11:36:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 11:36:41,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-06-14 11:36:41,897 INFO L175 Difference]: Start difference. First operand has 61 places, 34 transitions, 184 flow. Second operand 8 states and 134 transitions. [2024-06-14 11:36:41,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 47 transitions, 328 flow [2024-06-14 11:36:41,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 298 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:36:41,899 INFO L231 Difference]: Finished difference. Result has 58 places, 30 transitions, 153 flow [2024-06-14 11:36:41,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=153, PETRI_PLACES=58, PETRI_TRANSITIONS=30} [2024-06-14 11:36:41,900 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2024-06-14 11:36:41,900 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 30 transitions, 153 flow [2024-06-14 11:36:41,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:41,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:41,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:41,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:36:41,900 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:41,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:41,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1009226351, now seen corresponding path program 6 times [2024-06-14 11:36:41,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:41,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592869126] [2024-06-14 11:36:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:41,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:41,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:41,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592869126] [2024-06-14 11:36:41,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592869126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:41,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:41,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:41,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963538647] [2024-06-14 11:36:41,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:41,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:42,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:42,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:42,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:42,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:42,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 30 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:42,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:42,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:42,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:42,095 INFO L124 PetriNetUnfolderBase]: 69/173 cut-off events. [2024-06-14 11:36:42,095 INFO L125 PetriNetUnfolderBase]: For 1532/1532 co-relation queries the response was YES. [2024-06-14 11:36:42,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 173 events. 69/173 cut-off events. For 1532/1532 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 625 event pairs, 27 based on Foata normal form. 6/178 useless extension candidates. Maximal degree in co-relation 600. Up to 56 conditions per place. [2024-06-14 11:36:42,097 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 24 selfloop transitions, 7 changer transitions 6/43 dead transitions. [2024-06-14 11:36:42,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 43 transitions, 285 flow [2024-06-14 11:36:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 11:36:42,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51953125 [2024-06-14 11:36:42,098 INFO L175 Difference]: Start difference. First operand has 58 places, 30 transitions, 153 flow. Second operand 8 states and 133 transitions. [2024-06-14 11:36:42,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 43 transitions, 285 flow [2024-06-14 11:36:42,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 43 transitions, 253 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 11:36:42,101 INFO L231 Difference]: Finished difference. Result has 52 places, 28 transitions, 134 flow [2024-06-14 11:36:42,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=28} [2024-06-14 11:36:42,102 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-14 11:36:42,102 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 28 transitions, 134 flow [2024-06-14 11:36:42,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:42,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:42,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:42,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:36:42,102 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:42,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:42,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1000655471, now seen corresponding path program 7 times [2024-06-14 11:36:42,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:42,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374633831] [2024-06-14 11:36:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:42,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:42,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:42,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374633831] [2024-06-14 11:36:42,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374633831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:42,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:42,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:42,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883955088] [2024-06-14 11:36:42,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:42,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:42,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:42,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:42,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 28 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:42,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:42,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:42,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:42,307 INFO L124 PetriNetUnfolderBase]: 45/121 cut-off events. [2024-06-14 11:36:42,307 INFO L125 PetriNetUnfolderBase]: For 655/655 co-relation queries the response was YES. [2024-06-14 11:36:42,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 121 events. 45/121 cut-off events. For 655/655 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 359 event pairs, 19 based on Foata normal form. 8/128 useless extension candidates. Maximal degree in co-relation 358. Up to 52 conditions per place. [2024-06-14 11:36:42,308 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 16 selfloop transitions, 4 changer transitions 11/37 dead transitions. [2024-06-14 11:36:42,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 37 transitions, 218 flow [2024-06-14 11:36:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 11:36:42,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:36:42,311 INFO L175 Difference]: Start difference. First operand has 52 places, 28 transitions, 134 flow. Second operand 8 states and 128 transitions. [2024-06-14 11:36:42,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 37 transitions, 218 flow [2024-06-14 11:36:42,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 37 transitions, 200 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:36:42,312 INFO L231 Difference]: Finished difference. Result has 51 places, 23 transitions, 94 flow [2024-06-14 11:36:42,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=94, PETRI_PLACES=51, PETRI_TRANSITIONS=23} [2024-06-14 11:36:42,312 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-06-14 11:36:42,312 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 23 transitions, 94 flow [2024-06-14 11:36:42,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:42,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:42,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:42,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:36:42,312 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:36:42,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1808700817, now seen corresponding path program 8 times [2024-06-14 11:36:42,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:42,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632955290] [2024-06-14 11:36:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:42,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:42,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:42,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632955290] [2024-06-14 11:36:42,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632955290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:42,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:42,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:42,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197943183] [2024-06-14 11:36:42,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:42,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:42,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:42,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:42,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:42,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-14 11:36:42,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 23 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:42,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:42,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-14 11:36:42,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:42,522 INFO L124 PetriNetUnfolderBase]: 20/66 cut-off events. [2024-06-14 11:36:42,522 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-06-14 11:36:42,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 66 events. 20/66 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 105 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 159. Up to 24 conditions per place. [2024-06-14 11:36:42,522 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2024-06-14 11:36:42,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 29 transitions, 136 flow [2024-06-14 11:36:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:42,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 11:36:42,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-14 11:36:42,523 INFO L175 Difference]: Start difference. First operand has 51 places, 23 transitions, 94 flow. Second operand 8 states and 120 transitions. [2024-06-14 11:36:42,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 29 transitions, 136 flow [2024-06-14 11:36:42,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 29 transitions, 110 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 11:36:42,524 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2024-06-14 11:36:42,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2024-06-14 11:36:42,524 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-06-14 11:36:42,524 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2024-06-14 11:36:42,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:42,527 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-14 11:36:42,527 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-14 11:36:42,527 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-14 11:36:42,527 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-14 11:36:42,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:36:42,528 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2024-06-14 11:36:42,530 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-14 11:36:42,530 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-14 11:36:42,533 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-14 11:36:42,533 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-14 11:36:42,534 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 11:36:42 BasicIcfg [2024-06-14 11:36:42,534 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-14 11:36:42,534 INFO L158 Benchmark]: Toolchain (without parser) took 10173.88ms. Allocated memory was 148.9MB in the beginning and 375.4MB in the end (delta: 226.5MB). Free memory was 110.8MB in the beginning and 243.1MB in the end (delta: -132.3MB). Peak memory consumption was 95.1MB. Max. memory is 16.1GB. [2024-06-14 11:36:42,535 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 148.9MB. Free memory is still 117.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:36:42,535 INFO L158 Benchmark]: Witness Parser took 0.13ms. Allocated memory is still 148.9MB. Free memory is still 114.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:36:42,535 INFO L158 Benchmark]: CACSL2BoogieTranslator took 437.47ms. Allocated memory is still 148.9MB. Free memory was 110.8MB in the beginning and 84.8MB in the end (delta: 26.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-14 11:36:42,535 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.23ms. Allocated memory is still 148.9MB. Free memory was 84.8MB in the beginning and 82.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:36:42,535 INFO L158 Benchmark]: Boogie Preprocessor took 60.87ms. Allocated memory is still 148.9MB. Free memory was 82.8MB in the beginning and 80.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:36:42,535 INFO L158 Benchmark]: RCFGBuilder took 496.14ms. Allocated memory is still 148.9MB. Free memory was 80.7MB in the beginning and 100.7MB in the end (delta: -20.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-06-14 11:36:42,535 INFO L158 Benchmark]: TraceAbstraction took 9119.07ms. Allocated memory was 148.9MB in the beginning and 375.4MB in the end (delta: 226.5MB). Free memory was 99.8MB in the beginning and 243.1MB in the end (delta: -143.4MB). Peak memory consumption was 85.1MB. Max. memory is 16.1GB. [2024-06-14 11:36:42,536 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 148.9MB. Free memory is still 117.8MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.13ms. Allocated memory is still 148.9MB. Free memory is still 114.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 437.47ms. Allocated memory is still 148.9MB. Free memory was 110.8MB in the beginning and 84.8MB in the end (delta: 26.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.23ms. Allocated memory is still 148.9MB. Free memory was 84.8MB in the beginning and 82.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.87ms. Allocated memory is still 148.9MB. Free memory was 82.8MB in the beginning and 80.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 496.14ms. Allocated memory is still 148.9MB. Free memory was 80.7MB in the beginning and 100.7MB in the end (delta: -20.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 9119.07ms. Allocated memory was 148.9MB in the beginning and 375.4MB in the end (delta: 226.5MB). Free memory was 99.8MB in the beginning and 243.1MB in the end (delta: -143.4MB). Peak memory consumption was 85.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 767]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 768]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 51 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.0s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1754 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1252 mSDsluCounter, 387 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 241 mSDsCounter, 201 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6074 IncrementalHoareTripleChecker+Invalid, 6275 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 201 mSolverCounterUnsat, 146 mSDtfsCounter, 6074 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=490occurred in iteration=22, InterpolantAutomatonStates: 282, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 672 NumberOfCodeBlocks, 672 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 631 ConstructedInterpolants, 0 QuantifiedInterpolants, 5831 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 41 InterpolantComputations, 41 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-14 11:36:42,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE