./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-atomic/szymanski.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/szymanski.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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-atomic/szymanski.i ./goblint.2024-06-19_11-23-25.files/protection/szymanski.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-eb4cb34-m [2024-06-21 15:42:53,821 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:42:53,993 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:42:53,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:42:53,999 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:42:54,019 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:42:54,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:42:54,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:42:54,020 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:42:54,020 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:42:54,020 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:42:54,021 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:42:54,021 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:42:54,021 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:42:54,021 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:42:54,022 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:42:54,022 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:42:54,022 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:42:54,023 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:42:54,023 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:42:54,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:42:54,023 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:42:54,024 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:42:54,024 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:42:54,024 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:42:54,024 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:42:54,024 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:42:54,025 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:42:54,025 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:42:54,025 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:42:54,026 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:42:54,026 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:42:54,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:42:54,027 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:42:54,027 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:42:54,027 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:42:54,027 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:42:54,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:42:54,028 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:42:54,028 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:42:54,028 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:42:54,028 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:42:54,028 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:42:54,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:42:54,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:42:54,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:42:54,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:42:54,259 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:42:54,260 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:42:54,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/szymanski.yml/witness.yml [2024-06-21 15:42:54,344 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:42:54,344 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:42:54,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/szymanski.i [2024-06-21 15:42:55,316 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:42:55,531 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:42:55,532 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i [2024-06-21 15:42:55,547 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a90f1815/04b29423bfb748009945cde0bf63910e/FLAGab762c4c5 [2024-06-21 15:42:55,568 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a90f1815/04b29423bfb748009945cde0bf63910e [2024-06-21 15:42:55,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:42:55,572 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:42:55,575 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:42:55,575 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:42:55,580 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:42:55,582 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:42:54" (1/2) ... [2024-06-21 15:42:55,583 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a69a874 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:42:55, skipping insertion in model container [2024-06-21 15:42:55,583 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:42:54" (1/2) ... [2024-06-21 15:42:55,585 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4896c5d9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:42:55, skipping insertion in model container [2024-06-21 15:42:55,585 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:42:55" (2/2) ... [2024-06-21 15:42:55,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a69a874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:55, skipping insertion in model container [2024-06-21 15:42:55,586 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:42:55" (2/2) ... [2024-06-21 15:42:55,586 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:42:55,615 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:42:55,616 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] ((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || ((((flag2 == 0 || flag2 == 1) || flag2 == 2) || flag2 == 3) || flag2 == 4))) && (! multithreaded || ((((flag1 == 0 || flag1 == 1) || flag1 == 2) || flag1 == 3) || flag1 == 4)) [2024-06-21 15:42:55,617 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] ((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || ((((flag2 == 0 || flag2 == 1) || flag2 == 2) || flag2 == 3) || flag2 == 4))) && (! multithreaded || ((((flag1 == 0 || flag1 == 1) || flag1 == 2) || flag1 == 3) || flag1 == 4)) [2024-06-21 15:42:55,617 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:42:55,617 INFO L106 edCorrectnessWitness]: ghost_update [L818-L818] multithreaded = 1; [2024-06-21 15:42:55,662 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:42:55,908 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:42:55,916 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:42:55,980 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:42:56,014 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:42:56,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56 WrapperNode [2024-06-21 15:42:56,015 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:42:56,016 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:42:56,016 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:42:56,016 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:42:56,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,054 INFO L138 Inliner]: procedures = 169, calls = 66, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 170 [2024-06-21 15:42:56,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:42:56,056 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:42:56,057 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:42:56,057 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:42:56,072 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,075 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,085 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]. [2024-06-21 15:42:56,085 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,085 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,089 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,097 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,098 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,099 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,101 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:42:56,102 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:42:56,102 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:42:56,102 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:42:56,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (1/1) ... [2024-06-21 15:42:56,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:42:56,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:42:56,125 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) [2024-06-21 15:42:56,130 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 [2024-06-21 15:42:56,150 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-06-21 15:42:56,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-06-21 15:42:56,151 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-21 15:42:56,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-21 15:42:56,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:42:56,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:42:56,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:42:56,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:42:56,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:42:56,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:42:56,152 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:42:56,260 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:42:56,263 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:42:56,418 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:42:56,419 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:42:56,492 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:42:56,492 INFO L320 CfgBuilder]: Removed 8 assume(true) statements. [2024-06-21 15:42:56,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:42:56 BoogieIcfgContainer [2024-06-21 15:42:56,492 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:42:56,494 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:42:56,494 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:42:56,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:42:56,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:42:54" (1/4) ... [2024-06-21 15:42:56,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f331b9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:42:56, skipping insertion in model container [2024-06-21 15:42:56,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:42:55" (2/4) ... [2024-06-21 15:42:56,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f331b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:42:56, skipping insertion in model container [2024-06-21 15:42:56,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:56" (3/4) ... [2024-06-21 15:42:56,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f331b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:42:56, skipping insertion in model container [2024-06-21 15:42:56,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:42:56" (4/4) ... [2024-06-21 15:42:56,499 INFO L112 eAbstractionObserver]: Analyzing ICFG szymanski.i [2024-06-21 15:42:56,524 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:42:56,524 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 15:42:56,525 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:42:56,564 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-21 15:42:56,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 67 transitions, 148 flow [2024-06-21 15:42:56,626 INFO L124 PetriNetUnfolderBase]: 10/65 cut-off events. [2024-06-21 15:42:56,626 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-21 15:42:56,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 10/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 118 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2024-06-21 15:42:56,630 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 67 transitions, 148 flow [2024-06-21 15:42:56,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 63 transitions, 135 flow [2024-06-21 15:42:56,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:42:56,651 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;@1aff92bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:42:56,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 15:42:56,654 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:42:56,654 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 15:42:56,654 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:42:56,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:56,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 15:42:56,655 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)] === [2024-06-21 15:42:56,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:56,659 INFO L85 PathProgramCache]: Analyzing trace with hash 304155473, now seen corresponding path program 1 times [2024-06-21 15:42:56,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:56,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884286399] [2024-06-21 15:42:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:56,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:56,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:56,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884286399] [2024-06-21 15:42:56,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884286399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:56,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:56,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 15:42:56,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536159451] [2024-06-21 15:42:56,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:56,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 15:42:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:56,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 15:42:56,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 15:42:56,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 67 [2024-06-21 15:42:56,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:56,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:56,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 67 [2024-06-21 15:42:56,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:57,190 INFO L124 PetriNetUnfolderBase]: 616/1312 cut-off events. [2024-06-21 15:42:57,191 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 15:42:57,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2155 conditions, 1312 events. 616/1312 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7690 event pairs, 292 based on Foata normal form. 1/1259 useless extension candidates. Maximal degree in co-relation 2097. Up to 805 conditions per place. [2024-06-21 15:42:57,203 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 30 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2024-06-21 15:42:57,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 216 flow [2024-06-21 15:42:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 15:42:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 15:42:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2024-06-21 15:42:57,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7412935323383084 [2024-06-21 15:42:57,215 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 135 flow. Second operand 3 states and 149 transitions. [2024-06-21 15:42:57,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 216 flow [2024-06-21 15:42:57,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 210 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:42:57,223 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 151 flow [2024-06-21 15:42:57,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2024-06-21 15:42:57,228 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-06-21 15:42:57,228 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 151 flow [2024-06-21 15:42:57,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:57,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:57,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:57,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:42:57,230 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)] === [2024-06-21 15:42:57,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:57,230 INFO L85 PathProgramCache]: Analyzing trace with hash 235692848, now seen corresponding path program 1 times [2024-06-21 15:42:57,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:57,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424124484] [2024-06-21 15:42:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:57,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:57,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:57,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424124484] [2024-06-21 15:42:57,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424124484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:57,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:57,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:42:57,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539483234] [2024-06-21 15:42:57,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:57,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:42:57,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:57,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:42:57,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:42:57,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-21 15:42:57,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:57,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:57,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-21 15:42:57,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:57,555 INFO L124 PetriNetUnfolderBase]: 672/1435 cut-off events. [2024-06-21 15:42:57,556 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2024-06-21 15:42:57,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 1435 events. 672/1435 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8610 event pairs, 122 based on Foata normal form. 4/1394 useless extension candidates. Maximal degree in co-relation 1842. Up to 752 conditions per place. [2024-06-21 15:42:57,564 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 40 selfloop transitions, 6 changer transitions 1/82 dead transitions. [2024-06-21 15:42:57,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 286 flow [2024-06-21 15:42:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:42:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:42:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-06-21 15:42:57,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313432835820896 [2024-06-21 15:42:57,569 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 151 flow. Second operand 4 states and 196 transitions. [2024-06-21 15:42:57,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 286 flow [2024-06-21 15:42:57,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 82 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:42:57,573 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 175 flow [2024-06-21 15:42:57,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2024-06-21 15:42:57,574 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-06-21 15:42:57,574 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 175 flow [2024-06-21 15:42:57,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:57,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:57,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:57,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:42:57,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:57,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:57,578 INFO L85 PathProgramCache]: Analyzing trace with hash 964039940, now seen corresponding path program 1 times [2024-06-21 15:42:57,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:57,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605872644] [2024-06-21 15:42:57,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:57,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:57,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:57,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605872644] [2024-06-21 15:42:57,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605872644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:57,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:57,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:42:57,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013821545] [2024-06-21 15:42:57,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:57,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:42:57,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:42:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:42:57,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-21 15:42:57,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:57,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:57,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-21 15:42:57,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:57,836 INFO L124 PetriNetUnfolderBase]: 676/1460 cut-off events. [2024-06-21 15:42:57,836 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2024-06-21 15:42:57,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2704 conditions, 1460 events. 676/1460 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8747 event pairs, 123 based on Foata normal form. 2/1420 useless extension candidates. Maximal degree in co-relation 2005. Up to 751 conditions per place. [2024-06-21 15:42:57,845 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 40 selfloop transitions, 8 changer transitions 1/84 dead transitions. [2024-06-21 15:42:57,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 318 flow [2024-06-21 15:42:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:42:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:42:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2024-06-21 15:42:57,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7350746268656716 [2024-06-21 15:42:57,847 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 175 flow. Second operand 4 states and 197 transitions. [2024-06-21 15:42:57,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 318 flow [2024-06-21 15:42:57,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 311 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 15:42:57,852 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 206 flow [2024-06-21 15:42:57,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-21 15:42:57,853 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2024-06-21 15:42:57,853 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 206 flow [2024-06-21 15:42:57,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:57,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:57,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:57,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:42:57,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:57,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2121866509, now seen corresponding path program 1 times [2024-06-21 15:42:57,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:57,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444502169] [2024-06-21 15:42:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:57,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:57,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:57,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444502169] [2024-06-21 15:42:57,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444502169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:57,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:57,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:42:57,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609025113] [2024-06-21 15:42:57,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:57,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:42:57,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:57,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:42:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:42:58,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-21 15:42:58,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:58,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:58,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-21 15:42:58,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:58,118 INFO L124 PetriNetUnfolderBase]: 667/1384 cut-off events. [2024-06-21 15:42:58,118 INFO L125 PetriNetUnfolderBase]: For 855/863 co-relation queries the response was YES. [2024-06-21 15:42:58,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 1384 events. 667/1384 cut-off events. For 855/863 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8122 event pairs, 239 based on Foata normal form. 2/1337 useless extension candidates. Maximal degree in co-relation 2566. Up to 849 conditions per place. [2024-06-21 15:42:58,140 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 42 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-06-21 15:42:58,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 344 flow [2024-06-21 15:42:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:42:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:42:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-06-21 15:42:58,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7164179104477612 [2024-06-21 15:42:58,142 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 206 flow. Second operand 4 states and 192 transitions. [2024-06-21 15:42:58,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 344 flow [2024-06-21 15:42:58,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 337 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 15:42:58,144 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 242 flow [2024-06-21 15:42:58,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-21 15:42:58,144 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2024-06-21 15:42:58,144 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 242 flow [2024-06-21 15:42:58,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:58,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:58,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:58,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:42:58,145 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)] === [2024-06-21 15:42:58,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:58,145 INFO L85 PathProgramCache]: Analyzing trace with hash -281575216, now seen corresponding path program 1 times [2024-06-21 15:42:58,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:58,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888161188] [2024-06-21 15:42:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:58,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:58,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888161188] [2024-06-21 15:42:58,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888161188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:58,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:58,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:42:58,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428399126] [2024-06-21 15:42:58,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:58,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:42:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:42:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:42:58,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:42:58,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:58,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:58,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:42:58,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:58,373 INFO L124 PetriNetUnfolderBase]: 786/1570 cut-off events. [2024-06-21 15:42:58,373 INFO L125 PetriNetUnfolderBase]: For 1611/1611 co-relation queries the response was YES. [2024-06-21 15:42:58,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3579 conditions, 1570 events. 786/1570 cut-off events. For 1611/1611 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9187 event pairs, 264 based on Foata normal form. 4/1516 useless extension candidates. Maximal degree in co-relation 2634. Up to 646 conditions per place. [2024-06-21 15:42:58,381 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 58 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-06-21 15:42:58,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 479 flow [2024-06-21 15:42:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:42:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:42:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-21 15:42:58,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7253731343283583 [2024-06-21 15:42:58,383 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 242 flow. Second operand 5 states and 243 transitions. [2024-06-21 15:42:58,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 479 flow [2024-06-21 15:42:58,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 105 transitions, 477 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 15:42:58,388 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 300 flow [2024-06-21 15:42:58,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-21 15:42:58,392 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2024-06-21 15:42:58,393 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 300 flow [2024-06-21 15:42:58,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:58,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:58,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:58,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:42:58,395 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)] === [2024-06-21 15:42:58,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:58,395 INFO L85 PathProgramCache]: Analyzing trace with hash -834636588, now seen corresponding path program 2 times [2024-06-21 15:42:58,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:58,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622769805] [2024-06-21 15:42:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:58,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:58,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:58,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622769805] [2024-06-21 15:42:58,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622769805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:58,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:58,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:42:58,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183761097] [2024-06-21 15:42:58,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:58,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:42:58,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:58,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:42:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:42:58,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:42:58,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:58,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:58,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:42:58,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:58,624 INFO L124 PetriNetUnfolderBase]: 805/1614 cut-off events. [2024-06-21 15:42:58,625 INFO L125 PetriNetUnfolderBase]: For 2567/2575 co-relation queries the response was YES. [2024-06-21 15:42:58,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3923 conditions, 1614 events. 805/1614 cut-off events. For 2567/2575 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9332 event pairs, 215 based on Foata normal form. 12/1569 useless extension candidates. Maximal degree in co-relation 3473. Up to 589 conditions per place. [2024-06-21 15:42:58,660 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 59 selfloop transitions, 15 changer transitions 0/108 dead transitions. [2024-06-21 15:42:58,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 546 flow [2024-06-21 15:42:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:42:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:42:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-21 15:42:58,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283582089552239 [2024-06-21 15:42:58,673 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 300 flow. Second operand 5 states and 244 transitions. [2024-06-21 15:42:58,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 546 flow [2024-06-21 15:42:58,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 108 transitions, 540 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-21 15:42:58,676 INFO L231 Difference]: Finished difference. Result has 81 places, 81 transitions, 343 flow [2024-06-21 15:42:58,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=81, PETRI_TRANSITIONS=81} [2024-06-21 15:42:58,677 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2024-06-21 15:42:58,677 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 81 transitions, 343 flow [2024-06-21 15:42:58,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:58,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:58,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:58,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:42:58,678 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:58,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash 932536177, now seen corresponding path program 1 times [2024-06-21 15:42:58,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:58,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879548272] [2024-06-21 15:42:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:58,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:58,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:58,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879548272] [2024-06-21 15:42:58,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879548272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:58,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:58,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:42:58,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102171725] [2024-06-21 15:42:58,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:58,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:42:58,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:58,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:42:58,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:42:58,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 67 [2024-06-21 15:42:58,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 81 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:58,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:58,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 67 [2024-06-21 15:42:58,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:58,966 INFO L124 PetriNetUnfolderBase]: 1309/2777 cut-off events. [2024-06-21 15:42:58,967 INFO L125 PetriNetUnfolderBase]: For 2488/2524 co-relation queries the response was YES. [2024-06-21 15:42:58,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5890 conditions, 2777 events. 1309/2777 cut-off events. For 2488/2524 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 18893 event pairs, 286 based on Foata normal form. 59/2652 useless extension candidates. Maximal degree in co-relation 5708. Up to 1007 conditions per place. [2024-06-21 15:42:58,980 INFO L140 encePairwiseOnDemand]: 50/67 looper letters, 78 selfloop transitions, 20 changer transitions 2/136 dead transitions. [2024-06-21 15:42:58,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 136 transitions, 705 flow [2024-06-21 15:42:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:42:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:42:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2024-06-21 15:42:58,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7343283582089553 [2024-06-21 15:42:58,982 INFO L175 Difference]: Start difference. First operand has 81 places, 81 transitions, 343 flow. Second operand 5 states and 246 transitions. [2024-06-21 15:42:58,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 136 transitions, 705 flow [2024-06-21 15:42:58,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 668 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 15:42:58,987 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 464 flow [2024-06-21 15:42:58,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-06-21 15:42:58,988 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 26 predicate places. [2024-06-21 15:42:58,988 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 464 flow [2024-06-21 15:42:58,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:58,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:58,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:58,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:42:58,989 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:58,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:58,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2138090317, now seen corresponding path program 1 times [2024-06-21 15:42:58,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:58,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506900462] [2024-06-21 15:42:58,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:58,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:59,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506900462] [2024-06-21 15:42:59,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506900462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:59,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:59,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:42:59,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787794714] [2024-06-21 15:42:59,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:59,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:42:59,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:42:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:42:59,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-21 15:42:59,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 464 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:59,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:59,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-21 15:42:59,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:59,273 INFO L124 PetriNetUnfolderBase]: 1253/2537 cut-off events. [2024-06-21 15:42:59,273 INFO L125 PetriNetUnfolderBase]: For 5722/5754 co-relation queries the response was YES. [2024-06-21 15:42:59,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6758 conditions, 2537 events. 1253/2537 cut-off events. For 5722/5754 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 16660 event pairs, 485 based on Foata normal form. 6/2432 useless extension candidates. Maximal degree in co-relation 6305. Up to 1634 conditions per place. [2024-06-21 15:42:59,293 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 50 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-06-21 15:42:59,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 634 flow [2024-06-21 15:42:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:42:59,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:42:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 194 transitions. [2024-06-21 15:42:59,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7238805970149254 [2024-06-21 15:42:59,295 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 464 flow. Second operand 4 states and 194 transitions. [2024-06-21 15:42:59,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 634 flow [2024-06-21 15:42:59,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 107 transitions, 634 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 15:42:59,340 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 504 flow [2024-06-21 15:42:59,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=504, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-06-21 15:42:59,341 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 30 predicate places. [2024-06-21 15:42:59,341 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 504 flow [2024-06-21 15:42:59,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:59,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:59,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:59,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:42:59,341 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)] === [2024-06-21 15:42:59,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:59,342 INFO L85 PathProgramCache]: Analyzing trace with hash 805194971, now seen corresponding path program 1 times [2024-06-21 15:42:59,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:59,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122488029] [2024-06-21 15:42:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:59,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:59,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:59,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122488029] [2024-06-21 15:42:59,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122488029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:59,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:59,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:42:59,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069455665] [2024-06-21 15:42:59,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:59,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:42:59,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:42:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:42:59,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-21 15:42:59,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 504 flow. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:59,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:59,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-21 15:42:59,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:59,619 INFO L124 PetriNetUnfolderBase]: 1299/2655 cut-off events. [2024-06-21 15:42:59,619 INFO L125 PetriNetUnfolderBase]: For 7782/7820 co-relation queries the response was YES. [2024-06-21 15:42:59,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7427 conditions, 2655 events. 1299/2655 cut-off events. For 7782/7820 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 17390 event pairs, 542 based on Foata normal form. 1/2525 useless extension candidates. Maximal degree in co-relation 7189. Up to 1743 conditions per place. [2024-06-21 15:42:59,659 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 51 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2024-06-21 15:42:59,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 108 transitions, 671 flow [2024-06-21 15:42:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:42:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:42:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 193 transitions. [2024-06-21 15:42:59,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7201492537313433 [2024-06-21 15:42:59,660 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 504 flow. Second operand 4 states and 193 transitions. [2024-06-21 15:42:59,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 108 transitions, 671 flow [2024-06-21 15:42:59,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 108 transitions, 662 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 15:42:59,666 INFO L231 Difference]: Finished difference. Result has 93 places, 99 transitions, 536 flow [2024-06-21 15:42:59,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=536, PETRI_PLACES=93, PETRI_TRANSITIONS=99} [2024-06-21 15:42:59,667 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 33 predicate places. [2024-06-21 15:42:59,667 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 99 transitions, 536 flow [2024-06-21 15:42:59,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:59,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:59,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:59,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:42:59,668 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)] === [2024-06-21 15:42:59,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:59,669 INFO L85 PathProgramCache]: Analyzing trace with hash 467124902, now seen corresponding path program 1 times [2024-06-21 15:42:59,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:59,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050615799] [2024-06-21 15:42:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:59,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:59,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:59,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050615799] [2024-06-21 15:42:59,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050615799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:59,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:59,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:42:59,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385007935] [2024-06-21 15:42:59,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:59,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:42:59,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:59,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:42:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:42:59,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:42:59,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 99 transitions, 536 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:59,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:59,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:42:59,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:59,981 INFO L124 PetriNetUnfolderBase]: 1369/2774 cut-off events. [2024-06-21 15:42:59,982 INFO L125 PetriNetUnfolderBase]: For 9874/9927 co-relation queries the response was YES. [2024-06-21 15:42:59,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8144 conditions, 2774 events. 1369/2774 cut-off events. For 9874/9927 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 18202 event pairs, 462 based on Foata normal form. 4/2666 useless extension candidates. Maximal degree in co-relation 7597. Up to 1091 conditions per place. [2024-06-21 15:42:59,994 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 67 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2024-06-21 15:42:59,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 130 transitions, 841 flow [2024-06-21 15:42:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:42:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:42:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-21 15:42:59,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283582089552239 [2024-06-21 15:42:59,996 INFO L175 Difference]: Start difference. First operand has 93 places, 99 transitions, 536 flow. Second operand 5 states and 244 transitions. [2024-06-21 15:42:59,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 130 transitions, 841 flow [2024-06-21 15:43:00,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 130 transitions, 833 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:00,003 INFO L231 Difference]: Finished difference. Result has 98 places, 105 transitions, 616 flow [2024-06-21 15:43:00,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=616, PETRI_PLACES=98, PETRI_TRANSITIONS=105} [2024-06-21 15:43:00,003 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 38 predicate places. [2024-06-21 15:43:00,003 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 105 transitions, 616 flow [2024-06-21 15:43:00,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:00,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:00,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:00,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:43:00,004 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)] === [2024-06-21 15:43:00,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:00,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1843394658, now seen corresponding path program 2 times [2024-06-21 15:43:00,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:00,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696170861] [2024-06-21 15:43:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:00,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:00,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:00,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696170861] [2024-06-21 15:43:00,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696170861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:00,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:00,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:00,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970669420] [2024-06-21 15:43:00,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:00,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:00,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:00,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:00,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:00,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:00,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 105 transitions, 616 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:00,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:00,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:00,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:00,320 INFO L124 PetriNetUnfolderBase]: 1400/2711 cut-off events. [2024-06-21 15:43:00,320 INFO L125 PetriNetUnfolderBase]: For 13326/13402 co-relation queries the response was YES. [2024-06-21 15:43:00,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9074 conditions, 2711 events. 1400/2711 cut-off events. For 13326/13402 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 17170 event pairs, 424 based on Foata normal form. 4/2609 useless extension candidates. Maximal degree in co-relation 8539. Up to 1002 conditions per place. [2024-06-21 15:43:00,337 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 65 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-21 15:43:00,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 133 transitions, 930 flow [2024-06-21 15:43:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-21 15:43:00,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283582089552239 [2024-06-21 15:43:00,339 INFO L175 Difference]: Start difference. First operand has 98 places, 105 transitions, 616 flow. Second operand 5 states and 244 transitions. [2024-06-21 15:43:00,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 133 transitions, 930 flow [2024-06-21 15:43:00,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 133 transitions, 920 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:00,349 INFO L231 Difference]: Finished difference. Result has 103 places, 108 transitions, 684 flow [2024-06-21 15:43:00,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=684, PETRI_PLACES=103, PETRI_TRANSITIONS=108} [2024-06-21 15:43:00,350 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 43 predicate places. [2024-06-21 15:43:00,350 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 108 transitions, 684 flow [2024-06-21 15:43:00,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:00,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:00,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:00,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:43:00,351 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)] === [2024-06-21 15:43:00,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash 739008706, now seen corresponding path program 1 times [2024-06-21 15:43:00,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:00,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355968348] [2024-06-21 15:43:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:00,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:00,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:00,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355968348] [2024-06-21 15:43:00,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355968348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:00,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:00,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:00,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770095019] [2024-06-21 15:43:00,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:00,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:00,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:00,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:00,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:00,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 108 transitions, 684 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:00,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:00,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:00,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:00,672 INFO L124 PetriNetUnfolderBase]: 1368/2741 cut-off events. [2024-06-21 15:43:00,672 INFO L125 PetriNetUnfolderBase]: For 15703/15744 co-relation queries the response was YES. [2024-06-21 15:43:00,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9169 conditions, 2741 events. 1368/2741 cut-off events. For 15703/15744 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 17885 event pairs, 456 based on Foata normal form. 12/2645 useless extension candidates. Maximal degree in co-relation 6798. Up to 1054 conditions per place. [2024-06-21 15:43:00,690 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 70 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2024-06-21 15:43:00,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 135 transitions, 993 flow [2024-06-21 15:43:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-21 15:43:00,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7253731343283583 [2024-06-21 15:43:00,692 INFO L175 Difference]: Start difference. First operand has 103 places, 108 transitions, 684 flow. Second operand 5 states and 243 transitions. [2024-06-21 15:43:00,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 135 transitions, 993 flow [2024-06-21 15:43:00,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 135 transitions, 959 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:00,706 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 718 flow [2024-06-21 15:43:00,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2024-06-21 15:43:00,707 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 46 predicate places. [2024-06-21 15:43:00,707 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 718 flow [2024-06-21 15:43:00,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:00,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:00,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:00,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:43:00,708 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)] === [2024-06-21 15:43:00,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:00,708 INFO L85 PathProgramCache]: Analyzing trace with hash -648454954, now seen corresponding path program 2 times [2024-06-21 15:43:00,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:00,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35578119] [2024-06-21 15:43:00,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:00,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:00,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:00,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35578119] [2024-06-21 15:43:00,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35578119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:00,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:00,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174658035] [2024-06-21 15:43:00,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:00,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:00,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:00,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:00,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:00,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:00,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 718 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:00,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:00,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:00,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:01,015 INFO L124 PetriNetUnfolderBase]: 1428/2883 cut-off events. [2024-06-21 15:43:01,015 INFO L125 PetriNetUnfolderBase]: For 19147/19200 co-relation queries the response was YES. [2024-06-21 15:43:01,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10088 conditions, 2883 events. 1428/2883 cut-off events. For 19147/19200 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 18947 event pairs, 458 based on Foata normal form. 10/2810 useless extension candidates. Maximal degree in co-relation 9423. Up to 1156 conditions per place. [2024-06-21 15:43:01,035 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 74 selfloop transitions, 22 changer transitions 0/142 dead transitions. [2024-06-21 15:43:01,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 142 transitions, 1084 flow [2024-06-21 15:43:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-06-21 15:43:01,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313432835820896 [2024-06-21 15:43:01,037 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 718 flow. Second operand 5 states and 245 transitions. [2024-06-21 15:43:01,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 142 transitions, 1084 flow [2024-06-21 15:43:01,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 142 transitions, 1055 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:01,054 INFO L231 Difference]: Finished difference. Result has 109 places, 115 transitions, 774 flow [2024-06-21 15:43:01,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=774, PETRI_PLACES=109, PETRI_TRANSITIONS=115} [2024-06-21 15:43:01,055 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 49 predicate places. [2024-06-21 15:43:01,055 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 115 transitions, 774 flow [2024-06-21 15:43:01,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:01,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:01,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:01,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:43:01,056 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)] === [2024-06-21 15:43:01,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:01,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1372150578, now seen corresponding path program 1 times [2024-06-21 15:43:01,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:01,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545165064] [2024-06-21 15:43:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:01,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:01,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545165064] [2024-06-21 15:43:01,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545165064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:01,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:01,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482284179] [2024-06-21 15:43:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:01,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:43:01,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:01,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:43:01,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:43:01,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 67 [2024-06-21 15:43:01,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 115 transitions, 774 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:01,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:01,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 67 [2024-06-21 15:43:01,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:01,460 INFO L124 PetriNetUnfolderBase]: 2236/4439 cut-off events. [2024-06-21 15:43:01,460 INFO L125 PetriNetUnfolderBase]: For 15959/16287 co-relation queries the response was YES. [2024-06-21 15:43:01,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13839 conditions, 4439 events. 2236/4439 cut-off events. For 15959/16287 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 32340 event pairs, 544 based on Foata normal form. 80/4125 useless extension candidates. Maximal degree in co-relation 13540. Up to 1850 conditions per place. [2024-06-21 15:43:01,490 INFO L140 encePairwiseOnDemand]: 50/67 looper letters, 95 selfloop transitions, 22 changer transitions 1/175 dead transitions. [2024-06-21 15:43:01,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 175 transitions, 1278 flow [2024-06-21 15:43:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:01,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-21 15:43:01,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283582089552239 [2024-06-21 15:43:01,492 INFO L175 Difference]: Start difference. First operand has 109 places, 115 transitions, 774 flow. Second operand 5 states and 244 transitions. [2024-06-21 15:43:01,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 175 transitions, 1278 flow [2024-06-21 15:43:01,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 175 transitions, 1250 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:01,514 INFO L231 Difference]: Finished difference. Result has 115 places, 128 transitions, 911 flow [2024-06-21 15:43:01,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=911, PETRI_PLACES=115, PETRI_TRANSITIONS=128} [2024-06-21 15:43:01,515 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 55 predicate places. [2024-06-21 15:43:01,515 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 128 transitions, 911 flow [2024-06-21 15:43:01,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:01,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:01,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:01,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:43:01,516 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)] === [2024-06-21 15:43:01,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:01,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1558870414, now seen corresponding path program 1 times [2024-06-21 15:43:01,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:01,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928984479] [2024-06-21 15:43:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:01,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:01,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:01,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928984479] [2024-06-21 15:43:01,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928984479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:01,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:01,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:43:01,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489309721] [2024-06-21 15:43:01,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:01,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:43:01,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:43:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:43:01,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-21 15:43:01,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 128 transitions, 911 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:01,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:01,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-21 15:43:01,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:01,908 INFO L124 PetriNetUnfolderBase]: 2095/4270 cut-off events. [2024-06-21 15:43:01,908 INFO L125 PetriNetUnfolderBase]: For 36450/36555 co-relation queries the response was YES. [2024-06-21 15:43:01,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17250 conditions, 4270 events. 2095/4270 cut-off events. For 36450/36555 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 31017 event pairs, 852 based on Foata normal form. 3/4189 useless extension candidates. Maximal degree in co-relation 16977. Up to 2873 conditions per place. [2024-06-21 15:43:01,940 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 65 selfloop transitions, 8 changer transitions 0/134 dead transitions. [2024-06-21 15:43:01,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 134 transitions, 1071 flow [2024-06-21 15:43:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:43:01,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:43:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 189 transitions. [2024-06-21 15:43:01,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7052238805970149 [2024-06-21 15:43:01,942 INFO L175 Difference]: Start difference. First operand has 115 places, 128 transitions, 911 flow. Second operand 4 states and 189 transitions. [2024-06-21 15:43:01,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 134 transitions, 1071 flow [2024-06-21 15:43:01,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 134 transitions, 1071 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:01,970 INFO L231 Difference]: Finished difference. Result has 119 places, 128 transitions, 932 flow [2024-06-21 15:43:01,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=932, PETRI_PLACES=119, PETRI_TRANSITIONS=128} [2024-06-21 15:43:01,971 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 59 predicate places. [2024-06-21 15:43:01,971 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 128 transitions, 932 flow [2024-06-21 15:43:01,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:01,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:01,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:01,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:43:01,972 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)] === [2024-06-21 15:43:01,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:01,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1288571381, now seen corresponding path program 1 times [2024-06-21 15:43:01,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:01,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685903138] [2024-06-21 15:43:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:01,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:02,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:02,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685903138] [2024-06-21 15:43:02,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685903138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:02,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:02,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:02,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431686171] [2024-06-21 15:43:02,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:02,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:02,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:02,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:02,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:02,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 128 transitions, 932 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:02,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:02,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:02,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:02,434 INFO L124 PetriNetUnfolderBase]: 2197/4383 cut-off events. [2024-06-21 15:43:02,434 INFO L125 PetriNetUnfolderBase]: For 42168/42288 co-relation queries the response was YES. [2024-06-21 15:43:02,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18080 conditions, 4383 events. 2197/4383 cut-off events. For 42168/42288 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 31056 event pairs, 710 based on Foata normal form. 16/4324 useless extension candidates. Maximal degree in co-relation 12773. Up to 1452 conditions per place. [2024-06-21 15:43:02,463 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 87 selfloop transitions, 18 changer transitions 0/163 dead transitions. [2024-06-21 15:43:02,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 163 transitions, 1359 flow [2024-06-21 15:43:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2024-06-21 15:43:02,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7343283582089553 [2024-06-21 15:43:02,465 INFO L175 Difference]: Start difference. First operand has 119 places, 128 transitions, 932 flow. Second operand 5 states and 246 transitions. [2024-06-21 15:43:02,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 163 transitions, 1359 flow [2024-06-21 15:43:02,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 163 transitions, 1329 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:02,493 INFO L231 Difference]: Finished difference. Result has 122 places, 134 transitions, 1031 flow [2024-06-21 15:43:02,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1031, PETRI_PLACES=122, PETRI_TRANSITIONS=134} [2024-06-21 15:43:02,494 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2024-06-21 15:43:02,494 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 134 transitions, 1031 flow [2024-06-21 15:43:02,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:02,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:02,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:02,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:43:02,495 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)] === [2024-06-21 15:43:02,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:02,495 INFO L85 PathProgramCache]: Analyzing trace with hash 553288941, now seen corresponding path program 2 times [2024-06-21 15:43:02,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:02,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634771488] [2024-06-21 15:43:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:02,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:02,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:02,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634771488] [2024-06-21 15:43:02,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634771488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:02,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:02,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:02,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927707046] [2024-06-21 15:43:02,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:02,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:02,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:02,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:02,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:02,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 134 transitions, 1031 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:02,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:02,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:02,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:03,023 INFO L124 PetriNetUnfolderBase]: 2222/4354 cut-off events. [2024-06-21 15:43:03,023 INFO L125 PetriNetUnfolderBase]: For 50382/50531 co-relation queries the response was YES. [2024-06-21 15:43:03,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19410 conditions, 4354 events. 2222/4354 cut-off events. For 50382/50531 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 30533 event pairs, 772 based on Foata normal form. 16/4250 useless extension candidates. Maximal degree in co-relation 13653. Up to 1594 conditions per place. [2024-06-21 15:43:03,061 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 79 selfloop transitions, 26 changer transitions 0/163 dead transitions. [2024-06-21 15:43:03,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 163 transitions, 1430 flow [2024-06-21 15:43:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-06-21 15:43:03,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313432835820896 [2024-06-21 15:43:03,062 INFO L175 Difference]: Start difference. First operand has 122 places, 134 transitions, 1031 flow. Second operand 5 states and 245 transitions. [2024-06-21 15:43:03,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 163 transitions, 1430 flow [2024-06-21 15:43:03,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 1411 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:03,107 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 1145 flow [2024-06-21 15:43:03,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1145, PETRI_PLACES=127, PETRI_TRANSITIONS=138} [2024-06-21 15:43:03,107 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 67 predicate places. [2024-06-21 15:43:03,108 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 1145 flow [2024-06-21 15:43:03,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:03,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:03,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:03,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:43:03,108 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)] === [2024-06-21 15:43:03,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:03,109 INFO L85 PathProgramCache]: Analyzing trace with hash -422811252, now seen corresponding path program 1 times [2024-06-21 15:43:03,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:03,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744090086] [2024-06-21 15:43:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:03,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:03,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:03,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744090086] [2024-06-21 15:43:03,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744090086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:03,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:03,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:03,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610410729] [2024-06-21 15:43:03,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:03,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:43:03,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:43:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:43:03,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 67 [2024-06-21 15:43:03,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 138 transitions, 1145 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:03,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:03,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 67 [2024-06-21 15:43:03,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:03,583 INFO L124 PetriNetUnfolderBase]: 2189/4518 cut-off events. [2024-06-21 15:43:03,583 INFO L125 PetriNetUnfolderBase]: For 28626/29051 co-relation queries the response was YES. [2024-06-21 15:43:03,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17264 conditions, 4518 events. 2189/4518 cut-off events. For 28626/29051 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 33624 event pairs, 986 based on Foata normal form. 130/4396 useless extension candidates. Maximal degree in co-relation 12955. Up to 2605 conditions per place. [2024-06-21 15:43:03,609 INFO L140 encePairwiseOnDemand]: 50/67 looper letters, 88 selfloop transitions, 46 changer transitions 1/196 dead transitions. [2024-06-21 15:43:03,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 196 transitions, 1753 flow [2024-06-21 15:43:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 248 transitions. [2024-06-21 15:43:03,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7402985074626866 [2024-06-21 15:43:03,611 INFO L175 Difference]: Start difference. First operand has 127 places, 138 transitions, 1145 flow. Second operand 5 states and 248 transitions. [2024-06-21 15:43:03,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 196 transitions, 1753 flow [2024-06-21 15:43:03,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 196 transitions, 1710 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:03,654 INFO L231 Difference]: Finished difference. Result has 132 places, 168 transitions, 1516 flow [2024-06-21 15:43:03,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1516, PETRI_PLACES=132, PETRI_TRANSITIONS=168} [2024-06-21 15:43:03,654 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 72 predicate places. [2024-06-21 15:43:03,655 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 168 transitions, 1516 flow [2024-06-21 15:43:03,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:03,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:03,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:03,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:43:03,655 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)] === [2024-06-21 15:43:03,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash -591332081, now seen corresponding path program 1 times [2024-06-21 15:43:03,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:03,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935655482] [2024-06-21 15:43:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:03,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:03,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:03,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935655482] [2024-06-21 15:43:03,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935655482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:03,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:03,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:03,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995801108] [2024-06-21 15:43:03,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:03,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:03,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:03,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:03,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:03,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 168 transitions, 1516 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:03,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:03,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:03,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:04,208 INFO L124 PetriNetUnfolderBase]: 2504/4970 cut-off events. [2024-06-21 15:43:04,208 INFO L125 PetriNetUnfolderBase]: For 66551/66801 co-relation queries the response was YES. [2024-06-21 15:43:04,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24316 conditions, 4970 events. 2504/4970 cut-off events. For 66551/66801 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 36203 event pairs, 871 based on Foata normal form. 19/4826 useless extension candidates. Maximal degree in co-relation 18180. Up to 1857 conditions per place. [2024-06-21 15:43:04,242 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 86 selfloop transitions, 26 changer transitions 0/192 dead transitions. [2024-06-21 15:43:04,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 192 transitions, 1902 flow [2024-06-21 15:43:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-21 15:43:04,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7253731343283583 [2024-06-21 15:43:04,244 INFO L175 Difference]: Start difference. First operand has 132 places, 168 transitions, 1516 flow. Second operand 5 states and 243 transitions. [2024-06-21 15:43:04,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 192 transitions, 1902 flow [2024-06-21 15:43:04,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 192 transitions, 1858 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:04,309 INFO L231 Difference]: Finished difference. Result has 136 places, 169 transitions, 1548 flow [2024-06-21 15:43:04,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1548, PETRI_PLACES=136, PETRI_TRANSITIONS=169} [2024-06-21 15:43:04,309 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 76 predicate places. [2024-06-21 15:43:04,309 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 169 transitions, 1548 flow [2024-06-21 15:43:04,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:04,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:04,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:04,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:43:04,310 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)] === [2024-06-21 15:43:04,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1796991592, now seen corresponding path program 2 times [2024-06-21 15:43:04,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:04,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747694198] [2024-06-21 15:43:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:04,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:04,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:04,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747694198] [2024-06-21 15:43:04,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747694198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:04,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:04,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:04,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868217159] [2024-06-21 15:43:04,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:04,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:04,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:04,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:04,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:04,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 169 transitions, 1548 flow. Second operand has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:04,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:04,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:04,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:04,906 INFO L124 PetriNetUnfolderBase]: 2485/5001 cut-off events. [2024-06-21 15:43:04,906 INFO L125 PetriNetUnfolderBase]: For 71885/72135 co-relation queries the response was YES. [2024-06-21 15:43:04,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24704 conditions, 5001 events. 2485/5001 cut-off events. For 71885/72135 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 36691 event pairs, 893 based on Foata normal form. 23/4917 useless extension candidates. Maximal degree in co-relation 18409. Up to 2055 conditions per place. [2024-06-21 15:43:04,939 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 86 selfloop transitions, 32 changer transitions 0/198 dead transitions. [2024-06-21 15:43:04,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 198 transitions, 2021 flow [2024-06-21 15:43:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-21 15:43:04,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7253731343283583 [2024-06-21 15:43:04,941 INFO L175 Difference]: Start difference. First operand has 136 places, 169 transitions, 1548 flow. Second operand 5 states and 243 transitions. [2024-06-21 15:43:04,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 198 transitions, 2021 flow [2024-06-21 15:43:05,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 198 transitions, 1979 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:05,012 INFO L231 Difference]: Finished difference. Result has 139 places, 174 transitions, 1644 flow [2024-06-21 15:43:05,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1644, PETRI_PLACES=139, PETRI_TRANSITIONS=174} [2024-06-21 15:43:05,013 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 79 predicate places. [2024-06-21 15:43:05,013 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 174 transitions, 1644 flow [2024-06-21 15:43:05,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:05,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:05,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:05,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:43:05,014 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)] === [2024-06-21 15:43:05,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:05,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1799342632, now seen corresponding path program 3 times [2024-06-21 15:43:05,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:05,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650660554] [2024-06-21 15:43:05,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:05,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:05,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:05,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650660554] [2024-06-21 15:43:05,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650660554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:05,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:05,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:05,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327283900] [2024-06-21 15:43:05,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:05,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:05,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:05,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 174 transitions, 1644 flow. Second operand has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:05,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:05,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:05,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:05,622 INFO L124 PetriNetUnfolderBase]: 2443/4931 cut-off events. [2024-06-21 15:43:05,622 INFO L125 PetriNetUnfolderBase]: For 78933/79164 co-relation queries the response was YES. [2024-06-21 15:43:05,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24967 conditions, 4931 events. 2443/4931 cut-off events. For 78933/79164 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 36114 event pairs, 820 based on Foata normal form. 45/4883 useless extension candidates. Maximal degree in co-relation 18580. Up to 1856 conditions per place. [2024-06-21 15:43:05,662 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 94 selfloop transitions, 31 changer transitions 0/205 dead transitions. [2024-06-21 15:43:05,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 205 transitions, 2165 flow [2024-06-21 15:43:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:05,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-06-21 15:43:05,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313432835820896 [2024-06-21 15:43:05,664 INFO L175 Difference]: Start difference. First operand has 139 places, 174 transitions, 1644 flow. Second operand 5 states and 245 transitions. [2024-06-21 15:43:05,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 205 transitions, 2165 flow [2024-06-21 15:43:05,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 205 transitions, 2105 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:05,742 INFO L231 Difference]: Finished difference. Result has 142 places, 180 transitions, 1746 flow [2024-06-21 15:43:05,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1746, PETRI_PLACES=142, PETRI_TRANSITIONS=180} [2024-06-21 15:43:05,742 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 82 predicate places. [2024-06-21 15:43:05,743 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 180 transitions, 1746 flow [2024-06-21 15:43:05,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:05,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:05,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:05,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:43:05,743 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)] === [2024-06-21 15:43:05,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:05,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1660541263, now seen corresponding path program 1 times [2024-06-21 15:43:05,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:05,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265553564] [2024-06-21 15:43:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:05,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:05,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265553564] [2024-06-21 15:43:05,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265553564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:05,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:05,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:05,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553761208] [2024-06-21 15:43:05,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:05,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:43:05,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:05,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:43:05,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:43:05,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2024-06-21 15:43:05,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 180 transitions, 1746 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:05,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:05,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2024-06-21 15:43:05,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:06,377 INFO L124 PetriNetUnfolderBase]: 2683/5433 cut-off events. [2024-06-21 15:43:06,377 INFO L125 PetriNetUnfolderBase]: For 50075/50553 co-relation queries the response was YES. [2024-06-21 15:43:06,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23841 conditions, 5433 events. 2683/5433 cut-off events. For 50075/50553 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 41644 event pairs, 1201 based on Foata normal form. 159/5296 useless extension candidates. Maximal degree in co-relation 15621. Up to 3015 conditions per place. [2024-06-21 15:43:06,417 INFO L140 encePairwiseOnDemand]: 53/67 looper letters, 144 selfloop transitions, 36 changer transitions 0/240 dead transitions. [2024-06-21 15:43:06,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 240 transitions, 2642 flow [2024-06-21 15:43:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-06-21 15:43:06,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6955223880597015 [2024-06-21 15:43:06,419 INFO L175 Difference]: Start difference. First operand has 142 places, 180 transitions, 1746 flow. Second operand 5 states and 233 transitions. [2024-06-21 15:43:06,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 240 transitions, 2642 flow [2024-06-21 15:43:06,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 240 transitions, 2563 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:06,498 INFO L231 Difference]: Finished difference. Result has 148 places, 193 transitions, 2014 flow [2024-06-21 15:43:06,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2014, PETRI_PLACES=148, PETRI_TRANSITIONS=193} [2024-06-21 15:43:06,499 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 88 predicate places. [2024-06-21 15:43:06,499 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 193 transitions, 2014 flow [2024-06-21 15:43:06,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:06,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:06,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:06,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:43:06,499 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)] === [2024-06-21 15:43:06,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:06,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1360401259, now seen corresponding path program 1 times [2024-06-21 15:43:06,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:06,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703588607] [2024-06-21 15:43:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:06,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:06,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:06,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703588607] [2024-06-21 15:43:06,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703588607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:06,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:06,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:06,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215172887] [2024-06-21 15:43:06,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:06,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:06,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:06,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:06,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:06,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 193 transitions, 2014 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:06,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:06,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:06,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:07,184 INFO L124 PetriNetUnfolderBase]: 2625/5358 cut-off events. [2024-06-21 15:43:07,185 INFO L125 PetriNetUnfolderBase]: For 98654/98886 co-relation queries the response was YES. [2024-06-21 15:43:07,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28295 conditions, 5358 events. 2625/5358 cut-off events. For 98654/98886 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 40759 event pairs, 1042 based on Foata normal form. 13/5226 useless extension candidates. Maximal degree in co-relation 15936. Up to 2356 conditions per place. [2024-06-21 15:43:07,223 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 101 selfloop transitions, 26 changer transitions 0/215 dead transitions. [2024-06-21 15:43:07,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 215 transitions, 2440 flow [2024-06-21 15:43:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 240 transitions. [2024-06-21 15:43:07,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7164179104477612 [2024-06-21 15:43:07,225 INFO L175 Difference]: Start difference. First operand has 148 places, 193 transitions, 2014 flow. Second operand 5 states and 240 transitions. [2024-06-21 15:43:07,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 215 transitions, 2440 flow [2024-06-21 15:43:07,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 215 transitions, 2428 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:07,298 INFO L231 Difference]: Finished difference. Result has 153 places, 194 transitions, 2080 flow [2024-06-21 15:43:07,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2080, PETRI_PLACES=153, PETRI_TRANSITIONS=194} [2024-06-21 15:43:07,299 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 93 predicate places. [2024-06-21 15:43:07,299 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 194 transitions, 2080 flow [2024-06-21 15:43:07,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:07,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:07,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:07,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:43:07,300 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)] === [2024-06-21 15:43:07,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:07,300 INFO L85 PathProgramCache]: Analyzing trace with hash 625344171, now seen corresponding path program 2 times [2024-06-21 15:43:07,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:07,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690368384] [2024-06-21 15:43:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:07,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:07,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:07,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690368384] [2024-06-21 15:43:07,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690368384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:07,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:07,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:07,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841578762] [2024-06-21 15:43:07,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:07,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:07,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:07,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:07,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:07,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:07,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 194 transitions, 2080 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:07,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:07,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:07,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:07,915 INFO L124 PetriNetUnfolderBase]: 2625/5358 cut-off events. [2024-06-21 15:43:07,916 INFO L125 PetriNetUnfolderBase]: For 108831/109097 co-relation queries the response was YES. [2024-06-21 15:43:07,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29021 conditions, 5358 events. 2625/5358 cut-off events. For 108831/109097 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 40678 event pairs, 1099 based on Foata normal form. 15/5228 useless extension candidates. Maximal degree in co-relation 16361. Up to 2358 conditions per place. [2024-06-21 15:43:07,960 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 102 selfloop transitions, 28 changer transitions 0/218 dead transitions. [2024-06-21 15:43:07,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 218 transitions, 2554 flow [2024-06-21 15:43:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 241 transitions. [2024-06-21 15:43:07,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7194029850746269 [2024-06-21 15:43:07,961 INFO L175 Difference]: Start difference. First operand has 153 places, 194 transitions, 2080 flow. Second operand 5 states and 241 transitions. [2024-06-21 15:43:07,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 218 transitions, 2554 flow [2024-06-21 15:43:08,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 218 transitions, 2515 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:08,072 INFO L231 Difference]: Finished difference. Result has 156 places, 197 transitions, 2162 flow [2024-06-21 15:43:08,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2162, PETRI_PLACES=156, PETRI_TRANSITIONS=197} [2024-06-21 15:43:08,072 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 96 predicate places. [2024-06-21 15:43:08,072 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 197 transitions, 2162 flow [2024-06-21 15:43:08,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:08,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:08,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:08,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:43:08,073 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)] === [2024-06-21 15:43:08,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:08,073 INFO L85 PathProgramCache]: Analyzing trace with hash -42560779, now seen corresponding path program 3 times [2024-06-21 15:43:08,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:08,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000156044] [2024-06-21 15:43:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:08,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:08,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:08,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000156044] [2024-06-21 15:43:08,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000156044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:08,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:08,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:08,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085926918] [2024-06-21 15:43:08,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:08,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:08,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:08,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 197 transitions, 2162 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:08,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:08,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:08,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:08,701 INFO L124 PetriNetUnfolderBase]: 2668/5440 cut-off events. [2024-06-21 15:43:08,701 INFO L125 PetriNetUnfolderBase]: For 117790/118053 co-relation queries the response was YES. [2024-06-21 15:43:08,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29744 conditions, 5440 events. 2668/5440 cut-off events. For 117790/118053 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 40793 event pairs, 1017 based on Foata normal form. 19/5363 useless extension candidates. Maximal degree in co-relation 18102. Up to 2039 conditions per place. [2024-06-21 15:43:08,745 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 122 selfloop transitions, 17 changer transitions 0/227 dead transitions. [2024-06-21 15:43:08,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 227 transitions, 2711 flow [2024-06-21 15:43:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-21 15:43:08,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7253731343283583 [2024-06-21 15:43:08,746 INFO L175 Difference]: Start difference. First operand has 156 places, 197 transitions, 2162 flow. Second operand 5 states and 243 transitions. [2024-06-21 15:43:08,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 227 transitions, 2711 flow [2024-06-21 15:43:08,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 2666 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:08,847 INFO L231 Difference]: Finished difference. Result has 159 places, 197 transitions, 2157 flow [2024-06-21 15:43:08,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2157, PETRI_PLACES=159, PETRI_TRANSITIONS=197} [2024-06-21 15:43:08,848 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 99 predicate places. [2024-06-21 15:43:08,848 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 197 transitions, 2157 flow [2024-06-21 15:43:08,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:08,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:08,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:08,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:43:08,848 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:08,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:08,849 INFO L85 PathProgramCache]: Analyzing trace with hash 943930141, now seen corresponding path program 1 times [2024-06-21 15:43:08,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:08,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105213244] [2024-06-21 15:43:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:08,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:08,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:08,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105213244] [2024-06-21 15:43:08,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105213244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:08,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:08,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:08,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212135438] [2024-06-21 15:43:08,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:08,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:08,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:08,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:08,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:08,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:08,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 197 transitions, 2157 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:08,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:08,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:08,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:09,469 INFO L124 PetriNetUnfolderBase]: 2708/5574 cut-off events. [2024-06-21 15:43:09,469 INFO L125 PetriNetUnfolderBase]: For 134224/134484 co-relation queries the response was YES. [2024-06-21 15:43:09,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30833 conditions, 5574 events. 2708/5574 cut-off events. For 134224/134484 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 42446 event pairs, 638 based on Foata normal form. 29/5509 useless extension candidates. Maximal degree in co-relation 30447. Up to 2653 conditions per place. [2024-06-21 15:43:09,516 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 123 selfloop transitions, 14 changer transitions 2/227 dead transitions. [2024-06-21 15:43:09,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 227 transitions, 2679 flow [2024-06-21 15:43:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 241 transitions. [2024-06-21 15:43:09,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7194029850746269 [2024-06-21 15:43:09,517 INFO L175 Difference]: Start difference. First operand has 159 places, 197 transitions, 2157 flow. Second operand 5 states and 241 transitions. [2024-06-21 15:43:09,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 227 transitions, 2679 flow [2024-06-21 15:43:09,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 227 transitions, 2564 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 15:43:09,647 INFO L231 Difference]: Finished difference. Result has 159 places, 199 transitions, 2120 flow [2024-06-21 15:43:09,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2120, PETRI_PLACES=159, PETRI_TRANSITIONS=199} [2024-06-21 15:43:09,648 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 99 predicate places. [2024-06-21 15:43:09,648 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 199 transitions, 2120 flow [2024-06-21 15:43:09,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:09,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:09,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:09,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:43:09,648 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)] === [2024-06-21 15:43:09,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:09,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1686735416, now seen corresponding path program 1 times [2024-06-21 15:43:09,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:09,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837538740] [2024-06-21 15:43:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:09,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:09,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:09,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837538740] [2024-06-21 15:43:09,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837538740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:09,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:09,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:09,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71682453] [2024-06-21 15:43:09,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:09,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:09,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:09,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:09,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:09,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 199 transitions, 2120 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:09,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:09,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:09,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:10,331 INFO L124 PetriNetUnfolderBase]: 2772/5709 cut-off events. [2024-06-21 15:43:10,331 INFO L125 PetriNetUnfolderBase]: For 145280/145553 co-relation queries the response was YES. [2024-06-21 15:43:10,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32152 conditions, 5709 events. 2772/5709 cut-off events. For 145280/145553 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 43915 event pairs, 959 based on Foata normal form. 27/5627 useless extension candidates. Maximal degree in co-relation 31753. Up to 2610 conditions per place. [2024-06-21 15:43:10,380 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 112 selfloop transitions, 25 changer transitions 1/226 dead transitions. [2024-06-21 15:43:10,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 226 transitions, 2652 flow [2024-06-21 15:43:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2024-06-21 15:43:10,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7044776119402985 [2024-06-21 15:43:10,381 INFO L175 Difference]: Start difference. First operand has 159 places, 199 transitions, 2120 flow. Second operand 5 states and 236 transitions. [2024-06-21 15:43:10,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 226 transitions, 2652 flow [2024-06-21 15:43:10,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 226 transitions, 2639 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:10,520 INFO L231 Difference]: Finished difference. Result has 165 places, 205 transitions, 2270 flow [2024-06-21 15:43:10,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2270, PETRI_PLACES=165, PETRI_TRANSITIONS=205} [2024-06-21 15:43:10,521 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 105 predicate places. [2024-06-21 15:43:10,521 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 205 transitions, 2270 flow [2024-06-21 15:43:10,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:10,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:10,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:10,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:43:10,521 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)] === [2024-06-21 15:43:10,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:10,522 INFO L85 PathProgramCache]: Analyzing trace with hash 589435469, now seen corresponding path program 1 times [2024-06-21 15:43:10,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:10,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035260768] [2024-06-21 15:43:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:10,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:10,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035260768] [2024-06-21 15:43:10,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035260768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:10,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:10,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:10,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918310629] [2024-06-21 15:43:10,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:10,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:10,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:10,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:10,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:10,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 205 transitions, 2270 flow. Second operand has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:10,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:10,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:10,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:11,262 INFO L124 PetriNetUnfolderBase]: 2692/5491 cut-off events. [2024-06-21 15:43:11,262 INFO L125 PetriNetUnfolderBase]: For 156105/156400 co-relation queries the response was YES. [2024-06-21 15:43:11,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32687 conditions, 5491 events. 2692/5491 cut-off events. For 156105/156400 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 42199 event pairs, 1536 based on Foata normal form. 17/5301 useless extension candidates. Maximal degree in co-relation 24756. Up to 3697 conditions per place. [2024-06-21 15:43:11,304 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 106 selfloop transitions, 27 changer transitions 0/221 dead transitions. [2024-06-21 15:43:11,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 221 transitions, 2652 flow [2024-06-21 15:43:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-06-21 15:43:11,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925373134328359 [2024-06-21 15:43:11,305 INFO L175 Difference]: Start difference. First operand has 165 places, 205 transitions, 2270 flow. Second operand 5 states and 232 transitions. [2024-06-21 15:43:11,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 221 transitions, 2652 flow [2024-06-21 15:43:11,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 221 transitions, 2630 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:11,457 INFO L231 Difference]: Finished difference. Result has 169 places, 207 transitions, 2330 flow [2024-06-21 15:43:11,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2330, PETRI_PLACES=169, PETRI_TRANSITIONS=207} [2024-06-21 15:43:11,458 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 109 predicate places. [2024-06-21 15:43:11,458 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 207 transitions, 2330 flow [2024-06-21 15:43:11,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:11,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:11,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:11,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 15:43:11,459 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)] === [2024-06-21 15:43:11,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:11,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2067137233, now seen corresponding path program 2 times [2024-06-21 15:43:11,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:11,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971154339] [2024-06-21 15:43:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:11,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:11,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:11,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971154339] [2024-06-21 15:43:11,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971154339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:11,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:11,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:11,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984197568] [2024-06-21 15:43:11,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:11,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:11,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:11,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:11,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:11,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:11,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 207 transitions, 2330 flow. Second operand has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:11,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:11,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:11,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:12,160 INFO L124 PetriNetUnfolderBase]: 2759/5661 cut-off events. [2024-06-21 15:43:12,160 INFO L125 PetriNetUnfolderBase]: For 167003/167290 co-relation queries the response was YES. [2024-06-21 15:43:12,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34105 conditions, 5661 events. 2759/5661 cut-off events. For 167003/167290 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 43161 event pairs, 1170 based on Foata normal form. 22/5546 useless extension candidates. Maximal degree in co-relation 25977. Up to 2607 conditions per place. [2024-06-21 15:43:12,214 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 128 selfloop transitions, 24 changer transitions 0/240 dead transitions. [2024-06-21 15:43:12,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 240 transitions, 3023 flow [2024-06-21 15:43:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2024-06-21 15:43:12,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6985074626865672 [2024-06-21 15:43:12,215 INFO L175 Difference]: Start difference. First operand has 169 places, 207 transitions, 2330 flow. Second operand 5 states and 234 transitions. [2024-06-21 15:43:12,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 240 transitions, 3023 flow [2024-06-21 15:43:12,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 240 transitions, 2985 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:12,381 INFO L231 Difference]: Finished difference. Result has 172 places, 213 transitions, 2428 flow [2024-06-21 15:43:12,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2296, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2428, PETRI_PLACES=172, PETRI_TRANSITIONS=213} [2024-06-21 15:43:12,382 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 112 predicate places. [2024-06-21 15:43:12,382 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 213 transitions, 2428 flow [2024-06-21 15:43:12,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:12,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:12,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:12,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 15:43:12,383 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)] === [2024-06-21 15:43:12,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:12,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2067406003, now seen corresponding path program 3 times [2024-06-21 15:43:12,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:12,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280998614] [2024-06-21 15:43:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:12,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:12,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:12,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280998614] [2024-06-21 15:43:12,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280998614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:12,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:12,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:12,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890571358] [2024-06-21 15:43:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:12,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:12,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:12,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:12,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:12,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:12,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 213 transitions, 2428 flow. Second operand has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:12,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:12,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:12,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:13,215 INFO L124 PetriNetUnfolderBase]: 2741/5634 cut-off events. [2024-06-21 15:43:13,215 INFO L125 PetriNetUnfolderBase]: For 178633/178928 co-relation queries the response was YES. [2024-06-21 15:43:13,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34604 conditions, 5634 events. 2741/5634 cut-off events. For 178633/178928 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 43000 event pairs, 1147 based on Foata normal form. 26/5527 useless extension candidates. Maximal degree in co-relation 26488. Up to 2601 conditions per place. [2024-06-21 15:43:13,275 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 132 selfloop transitions, 28 changer transitions 0/248 dead transitions. [2024-06-21 15:43:13,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 248 transitions, 3128 flow [2024-06-21 15:43:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 242 transitions. [2024-06-21 15:43:13,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7223880597014926 [2024-06-21 15:43:13,277 INFO L175 Difference]: Start difference. First operand has 172 places, 213 transitions, 2428 flow. Second operand 5 states and 242 transitions. [2024-06-21 15:43:13,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 248 transitions, 3128 flow [2024-06-21 15:43:13,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 248 transitions, 3108 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:13,478 INFO L231 Difference]: Finished difference. Result has 177 places, 215 transitions, 2495 flow [2024-06-21 15:43:13,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2495, PETRI_PLACES=177, PETRI_TRANSITIONS=215} [2024-06-21 15:43:13,478 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 117 predicate places. [2024-06-21 15:43:13,478 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 215 transitions, 2495 flow [2024-06-21 15:43:13,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:13,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:13,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:13,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 15:43:13,479 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)] === [2024-06-21 15:43:13,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:13,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1659050563, now seen corresponding path program 1 times [2024-06-21 15:43:13,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:13,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398754150] [2024-06-21 15:43:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:13,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:13,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:13,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398754150] [2024-06-21 15:43:13,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398754150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:13,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:13,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:13,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899766241] [2024-06-21 15:43:13,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:13,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:43:13,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:43:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:43:13,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 67 [2024-06-21 15:43:13,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 215 transitions, 2495 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:13,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:13,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 67 [2024-06-21 15:43:13,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:14,238 INFO L124 PetriNetUnfolderBase]: 2519/5283 cut-off events. [2024-06-21 15:43:14,238 INFO L125 PetriNetUnfolderBase]: For 96355/96894 co-relation queries the response was YES. [2024-06-21 15:43:14,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27003 conditions, 5283 events. 2519/5283 cut-off events. For 96355/96894 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 40513 event pairs, 950 based on Foata normal form. 109/5106 useless extension candidates. Maximal degree in co-relation 19572. Up to 2147 conditions per place. [2024-06-21 15:43:14,289 INFO L140 encePairwiseOnDemand]: 50/67 looper letters, 147 selfloop transitions, 58 changer transitions 0/272 dead transitions. [2024-06-21 15:43:14,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 272 transitions, 3338 flow [2024-06-21 15:43:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:14,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 241 transitions. [2024-06-21 15:43:14,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7194029850746269 [2024-06-21 15:43:14,290 INFO L175 Difference]: Start difference. First operand has 177 places, 215 transitions, 2495 flow. Second operand 5 states and 241 transitions. [2024-06-21 15:43:14,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 272 transitions, 3338 flow [2024-06-21 15:43:14,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 272 transitions, 3298 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:14,452 INFO L231 Difference]: Finished difference. Result has 182 places, 244 transitions, 3038 flow [2024-06-21 15:43:14,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2416, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3038, PETRI_PLACES=182, PETRI_TRANSITIONS=244} [2024-06-21 15:43:14,453 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 122 predicate places. [2024-06-21 15:43:14,453 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 244 transitions, 3038 flow [2024-06-21 15:43:14,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:14,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:14,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:14,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 15:43:14,453 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)] === [2024-06-21 15:43:14,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:14,454 INFO L85 PathProgramCache]: Analyzing trace with hash -494803903, now seen corresponding path program 1 times [2024-06-21 15:43:14,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:14,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486802789] [2024-06-21 15:43:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:14,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:14,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:14,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486802789] [2024-06-21 15:43:14,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486802789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:14,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:14,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:14,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844619283] [2024-06-21 15:43:14,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:14,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:14,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:14,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:14,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:14,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 244 transitions, 3038 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:14,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:14,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:14,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:15,285 INFO L124 PetriNetUnfolderBase]: 2670/5506 cut-off events. [2024-06-21 15:43:15,286 INFO L125 PetriNetUnfolderBase]: For 196544/196847 co-relation queries the response was YES. [2024-06-21 15:43:15,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35884 conditions, 5506 events. 2670/5506 cut-off events. For 196544/196847 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 41490 event pairs, 1123 based on Foata normal form. 33/5415 useless extension candidates. Maximal degree in co-relation 24981. Up to 2481 conditions per place. [2024-06-21 15:43:15,336 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 129 selfloop transitions, 28 changer transitions 0/269 dead transitions. [2024-06-21 15:43:15,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 269 transitions, 3678 flow [2024-06-21 15:43:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2024-06-21 15:43:15,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134328358208956 [2024-06-21 15:43:15,338 INFO L175 Difference]: Start difference. First operand has 182 places, 244 transitions, 3038 flow. Second operand 5 states and 239 transitions. [2024-06-21 15:43:15,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 269 transitions, 3678 flow [2024-06-21 15:43:15,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 269 transitions, 3606 flow, removed 36 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:15,593 INFO L231 Difference]: Finished difference. Result has 187 places, 248 transitions, 3097 flow [2024-06-21 15:43:15,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3097, PETRI_PLACES=187, PETRI_TRANSITIONS=248} [2024-06-21 15:43:15,593 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 127 predicate places. [2024-06-21 15:43:15,593 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 248 transitions, 3097 flow [2024-06-21 15:43:15,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:15,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:15,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:15,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 15:43:15,594 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)] === [2024-06-21 15:43:15,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:15,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1993474179, now seen corresponding path program 2 times [2024-06-21 15:43:15,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:15,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235547342] [2024-06-21 15:43:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:15,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:15,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:15,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235547342] [2024-06-21 15:43:15,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235547342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:15,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:15,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198655357] [2024-06-21 15:43:15,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:15,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:15,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:15,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:15,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 248 transitions, 3097 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:15,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:15,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:15,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:16,360 INFO L124 PetriNetUnfolderBase]: 2668/5550 cut-off events. [2024-06-21 15:43:16,360 INFO L125 PetriNetUnfolderBase]: For 212061/212363 co-relation queries the response was YES. [2024-06-21 15:43:16,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36424 conditions, 5550 events. 2668/5550 cut-off events. For 212061/212363 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 42343 event pairs, 1041 based on Foata normal form. 72/5497 useless extension candidates. Maximal degree in co-relation 25119. Up to 2350 conditions per place. [2024-06-21 15:43:16,414 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 127 selfloop transitions, 41 changer transitions 0/280 dead transitions. [2024-06-21 15:43:16,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 280 transitions, 3817 flow [2024-06-21 15:43:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-06-21 15:43:16,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313432835820896 [2024-06-21 15:43:16,416 INFO L175 Difference]: Start difference. First operand has 187 places, 248 transitions, 3097 flow. Second operand 5 states and 245 transitions. [2024-06-21 15:43:16,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 280 transitions, 3817 flow [2024-06-21 15:43:16,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 280 transitions, 3745 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:16,631 INFO L231 Difference]: Finished difference. Result has 191 places, 254 transitions, 3264 flow [2024-06-21 15:43:16,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3264, PETRI_PLACES=191, PETRI_TRANSITIONS=254} [2024-06-21 15:43:16,631 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 131 predicate places. [2024-06-21 15:43:16,631 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 254 transitions, 3264 flow [2024-06-21 15:43:16,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:16,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:16,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:16,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 15:43:16,632 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)] === [2024-06-21 15:43:16,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:16,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2018469789, now seen corresponding path program 3 times [2024-06-21 15:43:16,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:16,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689638178] [2024-06-21 15:43:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:16,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:16,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:16,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689638178] [2024-06-21 15:43:16,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689638178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:16,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:16,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:16,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60815823] [2024-06-21 15:43:16,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:16,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:43:16,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:43:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:43:16,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2024-06-21 15:43:16,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 254 transitions, 3264 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:16,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:16,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2024-06-21 15:43:16,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:17,379 INFO L124 PetriNetUnfolderBase]: 2851/5741 cut-off events. [2024-06-21 15:43:17,380 INFO L125 PetriNetUnfolderBase]: For 130856/131514 co-relation queries the response was YES. [2024-06-21 15:43:17,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32645 conditions, 5741 events. 2851/5741 cut-off events. For 130856/131514 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 43433 event pairs, 1410 based on Foata normal form. 133/5559 useless extension candidates. Maximal degree in co-relation 25327. Up to 3616 conditions per place. [2024-06-21 15:43:17,430 INFO L140 encePairwiseOnDemand]: 53/67 looper letters, 113 selfloop transitions, 26 changer transitions 1/298 dead transitions. [2024-06-21 15:43:17,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 298 transitions, 3867 flow [2024-06-21 15:43:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2024-06-21 15:43:17,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776119402985075 [2024-06-21 15:43:17,431 INFO L175 Difference]: Start difference. First operand has 191 places, 254 transitions, 3264 flow. Second operand 5 states and 227 transitions. [2024-06-21 15:43:17,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 298 transitions, 3867 flow [2024-06-21 15:43:17,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 298 transitions, 3756 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:17,652 INFO L231 Difference]: Finished difference. Result has 196 places, 258 transitions, 3292 flow [2024-06-21 15:43:17,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3292, PETRI_PLACES=196, PETRI_TRANSITIONS=258} [2024-06-21 15:43:17,652 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 136 predicate places. [2024-06-21 15:43:17,653 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 258 transitions, 3292 flow [2024-06-21 15:43:17,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:17,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:17,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:17,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 15:43:17,653 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)] === [2024-06-21 15:43:17,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:17,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2040981205, now seen corresponding path program 1 times [2024-06-21 15:43:17,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:17,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417478086] [2024-06-21 15:43:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:17,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417478086] [2024-06-21 15:43:17,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417478086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:17,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:17,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:17,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917983986] [2024-06-21 15:43:17,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:17,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:17,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:17,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:17,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 258 transitions, 3292 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:17,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:17,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:17,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:18,475 INFO L124 PetriNetUnfolderBase]: 2648/5613 cut-off events. [2024-06-21 15:43:18,476 INFO L125 PetriNetUnfolderBase]: For 220673/220975 co-relation queries the response was YES. [2024-06-21 15:43:18,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38041 conditions, 5613 events. 2648/5613 cut-off events. For 220673/220975 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 43385 event pairs, 1046 based on Foata normal form. 31/5511 useless extension candidates. Maximal degree in co-relation 29227. Up to 2485 conditions per place. [2024-06-21 15:43:18,530 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 115 selfloop transitions, 49 changer transitions 0/281 dead transitions. [2024-06-21 15:43:18,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 281 transitions, 3917 flow [2024-06-21 15:43:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 240 transitions. [2024-06-21 15:43:18,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7164179104477612 [2024-06-21 15:43:18,531 INFO L175 Difference]: Start difference. First operand has 196 places, 258 transitions, 3292 flow. Second operand 5 states and 240 transitions. [2024-06-21 15:43:18,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 281 transitions, 3917 flow [2024-06-21 15:43:18,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 281 transitions, 3913 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:18,795 INFO L231 Difference]: Finished difference. Result has 201 places, 262 transitions, 3469 flow [2024-06-21 15:43:18,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3469, PETRI_PLACES=201, PETRI_TRANSITIONS=262} [2024-06-21 15:43:18,796 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 141 predicate places. [2024-06-21 15:43:18,796 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 262 transitions, 3469 flow [2024-06-21 15:43:18,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:18,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:18,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:18,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 15:43:18,796 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)] === [2024-06-21 15:43:18,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1249270819, now seen corresponding path program 2 times [2024-06-21 15:43:18,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:18,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332361526] [2024-06-21 15:43:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:18,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:18,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:18,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332361526] [2024-06-21 15:43:18,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332361526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:18,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:18,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:18,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861677309] [2024-06-21 15:43:18,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:18,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:18,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:18,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:18,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:18,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 262 transitions, 3469 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:18,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:18,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:18,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:19,584 INFO L124 PetriNetUnfolderBase]: 2601/5528 cut-off events. [2024-06-21 15:43:19,585 INFO L125 PetriNetUnfolderBase]: For 233858/234097 co-relation queries the response was YES. [2024-06-21 15:43:19,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38306 conditions, 5528 events. 2601/5528 cut-off events. For 233858/234097 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 42694 event pairs, 1052 based on Foata normal form. 27/5437 useless extension candidates. Maximal degree in co-relation 29304. Up to 2292 conditions per place. [2024-06-21 15:43:19,642 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 150 selfloop transitions, 24 changer transitions 0/291 dead transitions. [2024-06-21 15:43:19,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 291 transitions, 4209 flow [2024-06-21 15:43:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 241 transitions. [2024-06-21 15:43:19,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7194029850746269 [2024-06-21 15:43:19,643 INFO L175 Difference]: Start difference. First operand has 201 places, 262 transitions, 3469 flow. Second operand 5 states and 241 transitions. [2024-06-21 15:43:19,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 291 transitions, 4209 flow [2024-06-21 15:43:19,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 291 transitions, 4123 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:19,933 INFO L231 Difference]: Finished difference. Result has 204 places, 266 transitions, 3530 flow [2024-06-21 15:43:19,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3387, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3530, PETRI_PLACES=204, PETRI_TRANSITIONS=266} [2024-06-21 15:43:19,933 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 144 predicate places. [2024-06-21 15:43:19,934 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 266 transitions, 3530 flow [2024-06-21 15:43:19,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:19,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:19,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:19,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 15:43:19,934 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)] === [2024-06-21 15:43:19,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:19,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1992673821, now seen corresponding path program 1 times [2024-06-21 15:43:19,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:19,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374539095] [2024-06-21 15:43:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:19,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:19,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:19,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374539095] [2024-06-21 15:43:19,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374539095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:19,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:19,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:19,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101015610] [2024-06-21 15:43:19,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:19,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:19,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:19,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:19,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:20,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:20,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 266 transitions, 3530 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:20,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:20,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:20,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:20,819 INFO L124 PetriNetUnfolderBase]: 2619/5546 cut-off events. [2024-06-21 15:43:20,819 INFO L125 PetriNetUnfolderBase]: For 246333/246620 co-relation queries the response was YES. [2024-06-21 15:43:20,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38816 conditions, 5546 events. 2619/5546 cut-off events. For 246333/246620 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 42731 event pairs, 1070 based on Foata normal form. 25/5447 useless extension candidates. Maximal degree in co-relation 29702. Up to 2479 conditions per place. [2024-06-21 15:43:20,868 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 114 selfloop transitions, 58 changer transitions 0/289 dead transitions. [2024-06-21 15:43:20,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 289 transitions, 4191 flow [2024-06-21 15:43:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 240 transitions. [2024-06-21 15:43:20,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7164179104477612 [2024-06-21 15:43:20,869 INFO L175 Difference]: Start difference. First operand has 204 places, 266 transitions, 3530 flow. Second operand 5 states and 240 transitions. [2024-06-21 15:43:20,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 289 transitions, 4191 flow [2024-06-21 15:43:21,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 289 transitions, 4098 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:21,173 INFO L231 Difference]: Finished difference. Result has 206 places, 270 transitions, 3649 flow [2024-06-21 15:43:21,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3437, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3649, PETRI_PLACES=206, PETRI_TRANSITIONS=270} [2024-06-21 15:43:21,173 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 146 predicate places. [2024-06-21 15:43:21,174 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 270 transitions, 3649 flow [2024-06-21 15:43:21,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:21,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:21,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:21,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 15:43:21,174 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)] === [2024-06-21 15:43:21,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash 2017603897, now seen corresponding path program 2 times [2024-06-21 15:43:21,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:21,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715359930] [2024-06-21 15:43:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:21,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:21,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:21,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715359930] [2024-06-21 15:43:21,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715359930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:21,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:21,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:21,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232376834] [2024-06-21 15:43:21,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:21,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:21,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:21,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:21,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:21,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:21,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 270 transitions, 3649 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:21,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:21,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:21,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:22,033 INFO L124 PetriNetUnfolderBase]: 2524/5374 cut-off events. [2024-06-21 15:43:22,033 INFO L125 PetriNetUnfolderBase]: For 254747/254995 co-relation queries the response was YES. [2024-06-21 15:43:22,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37888 conditions, 5374 events. 2524/5374 cut-off events. For 254747/254995 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 41364 event pairs, 969 based on Foata normal form. 36/5293 useless extension candidates. Maximal degree in co-relation 28890. Up to 2196 conditions per place. [2024-06-21 15:43:22,084 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 135 selfloop transitions, 41 changer transitions 0/293 dead transitions. [2024-06-21 15:43:22,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 293 transitions, 4258 flow [2024-06-21 15:43:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-21 15:43:22,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283582089552239 [2024-06-21 15:43:22,085 INFO L175 Difference]: Start difference. First operand has 206 places, 270 transitions, 3649 flow. Second operand 5 states and 244 transitions. [2024-06-21 15:43:22,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 293 transitions, 4258 flow [2024-06-21 15:43:22,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 293 transitions, 4160 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:22,472 INFO L231 Difference]: Finished difference. Result has 209 places, 271 transitions, 3655 flow [2024-06-21 15:43:22,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3655, PETRI_PLACES=209, PETRI_TRANSITIONS=271} [2024-06-21 15:43:22,472 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 149 predicate places. [2024-06-21 15:43:22,473 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 271 transitions, 3655 flow [2024-06-21 15:43:22,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:22,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:22,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:22,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 15:43:22,473 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)] === [2024-06-21 15:43:22,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1093092355, now seen corresponding path program 2 times [2024-06-21 15:43:22,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:22,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506888908] [2024-06-21 15:43:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:22,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:22,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:22,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506888908] [2024-06-21 15:43:22,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506888908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:22,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:22,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:22,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128761587] [2024-06-21 15:43:22,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:22,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:43:22,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:43:22,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:43:22,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 67 [2024-06-21 15:43:22,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 271 transitions, 3655 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:22,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:22,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 67 [2024-06-21 15:43:22,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:23,097 INFO L124 PetriNetUnfolderBase]: 1928/4154 cut-off events. [2024-06-21 15:43:23,098 INFO L125 PetriNetUnfolderBase]: For 113626/114015 co-relation queries the response was YES. [2024-06-21 15:43:23,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25231 conditions, 4154 events. 1928/4154 cut-off events. For 113626/114015 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 30993 event pairs, 661 based on Foata normal form. 160/4147 useless extension candidates. Maximal degree in co-relation 21366. Up to 1660 conditions per place. [2024-06-21 15:43:23,137 INFO L140 encePairwiseOnDemand]: 50/67 looper letters, 110 selfloop transitions, 42 changer transitions 1/301 dead transitions. [2024-06-21 15:43:23,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 301 transitions, 4098 flow [2024-06-21 15:43:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:23,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2024-06-21 15:43:23,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134328358208956 [2024-06-21 15:43:23,138 INFO L175 Difference]: Start difference. First operand has 209 places, 271 transitions, 3655 flow. Second operand 5 states and 239 transitions. [2024-06-21 15:43:23,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 301 transitions, 4098 flow [2024-06-21 15:43:23,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 301 transitions, 3935 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 15:43:23,372 INFO L231 Difference]: Finished difference. Result has 212 places, 267 transitions, 3607 flow [2024-06-21 15:43:23,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3607, PETRI_PLACES=212, PETRI_TRANSITIONS=267} [2024-06-21 15:43:23,373 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 152 predicate places. [2024-06-21 15:43:23,373 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 267 transitions, 3607 flow [2024-06-21 15:43:23,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:23,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:23,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:23,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 15:43:23,374 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)] === [2024-06-21 15:43:23,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1376512887, now seen corresponding path program 3 times [2024-06-21 15:43:23,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:23,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710248324] [2024-06-21 15:43:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:23,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:23,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:23,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710248324] [2024-06-21 15:43:23,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710248324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:23,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:23,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:23,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271653260] [2024-06-21 15:43:23,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:23,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:43:23,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:23,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:43:23,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:43:23,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 67 [2024-06-21 15:43:23,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 267 transitions, 3607 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:23,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:23,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 67 [2024-06-21 15:43:23,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:23,905 INFO L124 PetriNetUnfolderBase]: 1317/3047 cut-off events. [2024-06-21 15:43:23,906 INFO L125 PetriNetUnfolderBase]: For 78682/79073 co-relation queries the response was YES. [2024-06-21 15:43:23,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18657 conditions, 3047 events. 1317/3047 cut-off events. For 78682/79073 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 21839 event pairs, 647 based on Foata normal form. 118/3040 useless extension candidates. Maximal degree in co-relation 15377. Up to 1663 conditions per place. [2024-06-21 15:43:23,936 INFO L140 encePairwiseOnDemand]: 53/67 looper letters, 103 selfloop transitions, 49 changer transitions 1/274 dead transitions. [2024-06-21 15:43:23,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 274 transitions, 3807 flow [2024-06-21 15:43:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-06-21 15:43:23,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6955223880597015 [2024-06-21 15:43:23,937 INFO L175 Difference]: Start difference. First operand has 212 places, 267 transitions, 3607 flow. Second operand 5 states and 233 transitions. [2024-06-21 15:43:23,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 274 transitions, 3807 flow [2024-06-21 15:43:24,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 274 transitions, 3573 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 15:43:24,133 INFO L231 Difference]: Finished difference. Result has 213 places, 254 transitions, 3310 flow [2024-06-21 15:43:24,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2862, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3310, PETRI_PLACES=213, PETRI_TRANSITIONS=254} [2024-06-21 15:43:24,134 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 153 predicate places. [2024-06-21 15:43:24,134 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 254 transitions, 3310 flow [2024-06-21 15:43:24,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:24,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:24,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:24,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 15:43:24,135 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)] === [2024-06-21 15:43:24,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash 334742190, now seen corresponding path program 1 times [2024-06-21 15:43:24,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:24,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692104095] [2024-06-21 15:43:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:24,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:24,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:24,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692104095] [2024-06-21 15:43:24,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692104095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:24,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:24,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:24,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366584146] [2024-06-21 15:43:24,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:24,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:24,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:24,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:24,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 254 transitions, 3310 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:24,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:24,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:24,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:24,722 INFO L124 PetriNetUnfolderBase]: 1360/3242 cut-off events. [2024-06-21 15:43:24,722 INFO L125 PetriNetUnfolderBase]: For 136454/136663 co-relation queries the response was YES. [2024-06-21 15:43:24,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22297 conditions, 3242 events. 1360/3242 cut-off events. For 136454/136663 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 23724 event pairs, 344 based on Foata normal form. 62/3260 useless extension candidates. Maximal degree in co-relation 21828. Up to 1304 conditions per place. [2024-06-21 15:43:24,754 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 129 selfloop transitions, 25 changer transitions 2/274 dead transitions. [2024-06-21 15:43:24,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 274 transitions, 3860 flow [2024-06-21 15:43:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-06-21 15:43:24,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6955223880597015 [2024-06-21 15:43:24,756 INFO L175 Difference]: Start difference. First operand has 213 places, 254 transitions, 3310 flow. Second operand 5 states and 233 transitions. [2024-06-21 15:43:24,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 274 transitions, 3860 flow [2024-06-21 15:43:24,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 274 transitions, 3772 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:24,954 INFO L231 Difference]: Finished difference. Result has 217 places, 256 transitions, 3323 flow [2024-06-21 15:43:24,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3323, PETRI_PLACES=217, PETRI_TRANSITIONS=256} [2024-06-21 15:43:24,954 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 157 predicate places. [2024-06-21 15:43:24,955 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 256 transitions, 3323 flow [2024-06-21 15:43:24,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:24,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:24,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:24,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 15:43:24,955 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:24,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1159907387, now seen corresponding path program 1 times [2024-06-21 15:43:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:24,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481374456] [2024-06-21 15:43:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:24,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:24,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:24,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481374456] [2024-06-21 15:43:24,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481374456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:24,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:24,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:24,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916952055] [2024-06-21 15:43:24,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:24,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:24,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:24,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:25,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:25,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 256 transitions, 3323 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:25,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:25,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:25,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:25,477 INFO L124 PetriNetUnfolderBase]: 1333/3164 cut-off events. [2024-06-21 15:43:25,477 INFO L125 PetriNetUnfolderBase]: For 135378/135584 co-relation queries the response was YES. [2024-06-21 15:43:25,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21795 conditions, 3164 events. 1333/3164 cut-off events. For 135378/135584 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 23173 event pairs, 435 based on Foata normal form. 57/3135 useless extension candidates. Maximal degree in co-relation 18153. Up to 1087 conditions per place. [2024-06-21 15:43:25,510 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 127 selfloop transitions, 30 changer transitions 2/277 dead transitions. [2024-06-21 15:43:25,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 277 transitions, 3908 flow [2024-06-21 15:43:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 237 transitions. [2024-06-21 15:43:25,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074626865671642 [2024-06-21 15:43:25,512 INFO L175 Difference]: Start difference. First operand has 217 places, 256 transitions, 3323 flow. Second operand 5 states and 237 transitions. [2024-06-21 15:43:25,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 277 transitions, 3908 flow [2024-06-21 15:43:25,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 277 transitions, 3767 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 15:43:25,718 INFO L231 Difference]: Finished difference. Result has 216 places, 257 transitions, 3274 flow [2024-06-21 15:43:25,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3182, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3274, PETRI_PLACES=216, PETRI_TRANSITIONS=257} [2024-06-21 15:43:25,719 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 156 predicate places. [2024-06-21 15:43:25,719 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 257 transitions, 3274 flow [2024-06-21 15:43:25,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:25,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:25,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:25,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 15:43:25,720 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:25,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1494060913, now seen corresponding path program 2 times [2024-06-21 15:43:25,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:25,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637782333] [2024-06-21 15:43:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:25,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:25,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637782333] [2024-06-21 15:43:25,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637782333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:25,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:25,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:25,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133347412] [2024-06-21 15:43:25,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:25,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:25,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:25,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:25,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:25,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 257 transitions, 3274 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:25,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:25,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:25,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:26,242 INFO L124 PetriNetUnfolderBase]: 1358/3220 cut-off events. [2024-06-21 15:43:26,242 INFO L125 PetriNetUnfolderBase]: For 132604/132824 co-relation queries the response was YES. [2024-06-21 15:43:26,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21966 conditions, 3220 events. 1358/3220 cut-off events. For 132604/132824 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 23517 event pairs, 264 based on Foata normal form. 48/3215 useless extension candidates. Maximal degree in co-relation 20826. Up to 923 conditions per place. [2024-06-21 15:43:26,272 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 131 selfloop transitions, 28 changer transitions 2/279 dead transitions. [2024-06-21 15:43:26,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 279 transitions, 3868 flow [2024-06-21 15:43:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:26,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 238 transitions. [2024-06-21 15:43:26,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7104477611940299 [2024-06-21 15:43:26,288 INFO L175 Difference]: Start difference. First operand has 216 places, 257 transitions, 3274 flow. Second operand 5 states and 238 transitions. [2024-06-21 15:43:26,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 279 transitions, 3868 flow [2024-06-21 15:43:26,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 279 transitions, 3789 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:26,531 INFO L231 Difference]: Finished difference. Result has 218 places, 257 transitions, 3263 flow [2024-06-21 15:43:26,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3263, PETRI_PLACES=218, PETRI_TRANSITIONS=257} [2024-06-21 15:43:26,532 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 158 predicate places. [2024-06-21 15:43:26,533 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 257 transitions, 3263 flow [2024-06-21 15:43:26,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:26,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:26,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:26,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 15:43:26,533 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:26,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:26,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2057725197, now seen corresponding path program 1 times [2024-06-21 15:43:26,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:26,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298781468] [2024-06-21 15:43:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:26,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:26,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:26,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298781468] [2024-06-21 15:43:26,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298781468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:26,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:26,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:26,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137737236] [2024-06-21 15:43:26,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:26,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:26,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:26,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:26,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:26,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 257 transitions, 3263 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:26,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:26,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:26,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:27,142 INFO L124 PetriNetUnfolderBase]: 1338/3139 cut-off events. [2024-06-21 15:43:27,143 INFO L125 PetriNetUnfolderBase]: For 133222/133451 co-relation queries the response was YES. [2024-06-21 15:43:27,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21509 conditions, 3139 events. 1338/3139 cut-off events. For 133222/133451 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 22950 event pairs, 689 based on Foata normal form. 49/3089 useless extension candidates. Maximal degree in co-relation 16921. Up to 1710 conditions per place. [2024-06-21 15:43:27,167 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 129 selfloop transitions, 24 changer transitions 0/271 dead transitions. [2024-06-21 15:43:27,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 271 transitions, 3697 flow [2024-06-21 15:43:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2024-06-21 15:43:27,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865671641791045 [2024-06-21 15:43:27,168 INFO L175 Difference]: Start difference. First operand has 218 places, 257 transitions, 3263 flow. Second operand 5 states and 230 transitions. [2024-06-21 15:43:27,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 271 transitions, 3697 flow [2024-06-21 15:43:27,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 271 transitions, 3579 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:43:27,380 INFO L231 Difference]: Finished difference. Result has 216 places, 258 transitions, 3214 flow [2024-06-21 15:43:27,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3214, PETRI_PLACES=216, PETRI_TRANSITIONS=258} [2024-06-21 15:43:27,381 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 156 predicate places. [2024-06-21 15:43:27,381 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 258 transitions, 3214 flow [2024-06-21 15:43:27,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:27,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:27,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:27,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 15:43:27,382 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:27,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash -435163537, now seen corresponding path program 2 times [2024-06-21 15:43:27,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:27,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033399828] [2024-06-21 15:43:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:27,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:27,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:27,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033399828] [2024-06-21 15:43:27,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033399828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:27,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:27,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:27,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774821429] [2024-06-21 15:43:27,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:27,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:27,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:27,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:27,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:27,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:27,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 258 transitions, 3214 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:27,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:27,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:27,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:27,915 INFO L124 PetriNetUnfolderBase]: 1384/3254 cut-off events. [2024-06-21 15:43:27,915 INFO L125 PetriNetUnfolderBase]: For 128886/129121 co-relation queries the response was YES. [2024-06-21 15:43:27,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21658 conditions, 3254 events. 1384/3254 cut-off events. For 128886/129121 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 23624 event pairs, 486 based on Foata normal form. 53/3249 useless extension candidates. Maximal degree in co-relation 17893. Up to 1341 conditions per place. [2024-06-21 15:43:27,947 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 142 selfloop transitions, 15 changer transitions 1/276 dead transitions. [2024-06-21 15:43:27,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 276 transitions, 3777 flow [2024-06-21 15:43:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-06-21 15:43:27,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6895522388059702 [2024-06-21 15:43:27,948 INFO L175 Difference]: Start difference. First operand has 216 places, 258 transitions, 3214 flow. Second operand 5 states and 231 transitions. [2024-06-21 15:43:27,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 276 transitions, 3777 flow [2024-06-21 15:43:28,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 276 transitions, 3746 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:28,131 INFO L231 Difference]: Finished difference. Result has 219 places, 259 transitions, 3233 flow [2024-06-21 15:43:28,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3184, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3233, PETRI_PLACES=219, PETRI_TRANSITIONS=259} [2024-06-21 15:43:28,131 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 159 predicate places. [2024-06-21 15:43:28,131 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 259 transitions, 3233 flow [2024-06-21 15:43:28,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:28,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:28,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:28,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 15:43:28,132 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:28,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:28,133 INFO L85 PathProgramCache]: Analyzing trace with hash -435223987, now seen corresponding path program 3 times [2024-06-21 15:43:28,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:28,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510814283] [2024-06-21 15:43:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:28,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:28,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:28,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510814283] [2024-06-21 15:43:28,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510814283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:28,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:28,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:28,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354699589] [2024-06-21 15:43:28,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:28,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:28,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:28,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:28,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:28,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:28,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 259 transitions, 3233 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:28,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:28,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:28,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:28,647 INFO L124 PetriNetUnfolderBase]: 1376/3241 cut-off events. [2024-06-21 15:43:28,648 INFO L125 PetriNetUnfolderBase]: For 127807/128044 co-relation queries the response was YES. [2024-06-21 15:43:28,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21676 conditions, 3241 events. 1376/3241 cut-off events. For 127807/128044 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 23513 event pairs, 482 based on Foata normal form. 47/3228 useless extension candidates. Maximal degree in co-relation 17997. Up to 1341 conditions per place. [2024-06-21 15:43:28,681 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 135 selfloop transitions, 22 changer transitions 2/277 dead transitions. [2024-06-21 15:43:28,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 277 transitions, 3805 flow [2024-06-21 15:43:28,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:28,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-06-21 15:43:28,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6895522388059702 [2024-06-21 15:43:28,682 INFO L175 Difference]: Start difference. First operand has 219 places, 259 transitions, 3233 flow. Second operand 5 states and 231 transitions. [2024-06-21 15:43:28,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 277 transitions, 3805 flow [2024-06-21 15:43:28,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 277 transitions, 3758 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:28,878 INFO L231 Difference]: Finished difference. Result has 221 places, 259 transitions, 3234 flow [2024-06-21 15:43:28,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3234, PETRI_PLACES=221, PETRI_TRANSITIONS=259} [2024-06-21 15:43:28,879 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 161 predicate places. [2024-06-21 15:43:28,879 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 259 transitions, 3234 flow [2024-06-21 15:43:28,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:28,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:28,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:28,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 15:43:28,880 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:28,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:28,880 INFO L85 PathProgramCache]: Analyzing trace with hash -373458424, now seen corresponding path program 1 times [2024-06-21 15:43:28,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:28,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346103984] [2024-06-21 15:43:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:28,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:28,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:28,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346103984] [2024-06-21 15:43:28,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346103984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:28,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:28,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:28,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743235364] [2024-06-21 15:43:28,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:28,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:28,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:28,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:28,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:28,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:28,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 259 transitions, 3234 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:28,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:28,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:28,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:29,385 INFO L124 PetriNetUnfolderBase]: 1367/3219 cut-off events. [2024-06-21 15:43:29,385 INFO L125 PetriNetUnfolderBase]: For 132669/132898 co-relation queries the response was YES. [2024-06-21 15:43:29,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21490 conditions, 3219 events. 1367/3219 cut-off events. For 132669/132898 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 23379 event pairs, 444 based on Foata normal form. 54/3213 useless extension candidates. Maximal degree in co-relation 17794. Up to 1142 conditions per place. [2024-06-21 15:43:29,418 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 129 selfloop transitions, 31 changer transitions 1/279 dead transitions. [2024-06-21 15:43:29,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 279 transitions, 3885 flow [2024-06-21 15:43:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-06-21 15:43:29,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6955223880597015 [2024-06-21 15:43:29,419 INFO L175 Difference]: Start difference. First operand has 221 places, 259 transitions, 3234 flow. Second operand 5 states and 233 transitions. [2024-06-21 15:43:29,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 279 transitions, 3885 flow [2024-06-21 15:43:29,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 279 transitions, 3838 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:29,608 INFO L231 Difference]: Finished difference. Result has 223 places, 264 transitions, 3362 flow [2024-06-21 15:43:29,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=3189, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3362, PETRI_PLACES=223, PETRI_TRANSITIONS=264} [2024-06-21 15:43:29,608 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 163 predicate places. [2024-06-21 15:43:29,608 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 264 transitions, 3362 flow [2024-06-21 15:43:29,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:29,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:29,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:29,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 15:43:29,609 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:29,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:29,610 INFO L85 PathProgramCache]: Analyzing trace with hash -373459416, now seen corresponding path program 1 times [2024-06-21 15:43:29,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:29,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085663257] [2024-06-21 15:43:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:29,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:29,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:29,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085663257] [2024-06-21 15:43:29,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085663257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:29,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:29,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:29,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182745398] [2024-06-21 15:43:29,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:29,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:43:29,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:29,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:43:29,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:43:29,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 67 [2024-06-21 15:43:29,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 264 transitions, 3362 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:29,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:29,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 67 [2024-06-21 15:43:29,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:30,051 INFO L124 PetriNetUnfolderBase]: 1208/2776 cut-off events. [2024-06-21 15:43:30,052 INFO L125 PetriNetUnfolderBase]: For 58241/58510 co-relation queries the response was YES. [2024-06-21 15:43:30,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15912 conditions, 2776 events. 1208/2776 cut-off events. For 58241/58510 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 19388 event pairs, 655 based on Foata normal form. 71/2759 useless extension candidates. Maximal degree in co-relation 13623. Up to 1680 conditions per place. [2024-06-21 15:43:30,076 INFO L140 encePairwiseOnDemand]: 54/67 looper letters, 115 selfloop transitions, 28 changer transitions 1/250 dead transitions. [2024-06-21 15:43:30,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 250 transitions, 3399 flow [2024-06-21 15:43:30,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-06-21 15:43:30,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746268656716418 [2024-06-21 15:43:30,079 INFO L175 Difference]: Start difference. First operand has 223 places, 264 transitions, 3362 flow. Second operand 5 states and 226 transitions. [2024-06-21 15:43:30,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 250 transitions, 3399 flow [2024-06-21 15:43:30,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 250 transitions, 3223 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 15:43:30,269 INFO L231 Difference]: Finished difference. Result has 220 places, 233 transitions, 2865 flow [2024-06-21 15:43:30,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2766, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2865, PETRI_PLACES=220, PETRI_TRANSITIONS=233} [2024-06-21 15:43:30,270 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 160 predicate places. [2024-06-21 15:43:30,270 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 233 transitions, 2865 flow [2024-06-21 15:43:30,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:30,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:30,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:30,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 15:43:30,271 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:30,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:30,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1786782764, now seen corresponding path program 1 times [2024-06-21 15:43:30,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:30,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060145207] [2024-06-21 15:43:30,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:30,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:30,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:30,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060145207] [2024-06-21 15:43:30,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060145207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:30,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:30,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:30,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941098192] [2024-06-21 15:43:30,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:30,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:30,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:30,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:30,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:30,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 233 transitions, 2865 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:30,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:30,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:30,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:30,702 INFO L124 PetriNetUnfolderBase]: 1090/2666 cut-off events. [2024-06-21 15:43:30,702 INFO L125 PetriNetUnfolderBase]: For 95032/95182 co-relation queries the response was YES. [2024-06-21 15:43:30,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16533 conditions, 2666 events. 1090/2666 cut-off events. For 95032/95182 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 19115 event pairs, 336 based on Foata normal form. 31/2648 useless extension candidates. Maximal degree in co-relation 15042. Up to 835 conditions per place. [2024-06-21 15:43:30,722 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 115 selfloop transitions, 34 changer transitions 1/253 dead transitions. [2024-06-21 15:43:30,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 253 transitions, 3451 flow [2024-06-21 15:43:30,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2024-06-21 15:43:30,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7044776119402985 [2024-06-21 15:43:30,723 INFO L175 Difference]: Start difference. First operand has 220 places, 233 transitions, 2865 flow. Second operand 5 states and 236 transitions. [2024-06-21 15:43:30,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 253 transitions, 3451 flow [2024-06-21 15:43:30,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 253 transitions, 3355 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:30,905 INFO L231 Difference]: Finished difference. Result has 223 places, 236 transitions, 2902 flow [2024-06-21 15:43:30,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2769, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2902, PETRI_PLACES=223, PETRI_TRANSITIONS=236} [2024-06-21 15:43:30,906 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 163 predicate places. [2024-06-21 15:43:30,906 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 236 transitions, 2902 flow [2024-06-21 15:43:30,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:30,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:30,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:30,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 15:43:30,906 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:30,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash 906237214, now seen corresponding path program 2 times [2024-06-21 15:43:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:30,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966508059] [2024-06-21 15:43:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:30,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:30,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:30,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966508059] [2024-06-21 15:43:30,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966508059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:30,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:30,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:30,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815842788] [2024-06-21 15:43:30,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:30,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:30,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:30,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:30,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:30,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:30,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 236 transitions, 2902 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:30,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:30,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:30,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:31,317 INFO L124 PetriNetUnfolderBase]: 1067/2627 cut-off events. [2024-06-21 15:43:31,317 INFO L125 PetriNetUnfolderBase]: For 94200/94349 co-relation queries the response was YES. [2024-06-21 15:43:31,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15692 conditions, 2627 events. 1067/2627 cut-off events. For 94200/94349 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 18861 event pairs, 337 based on Foata normal form. 45/2619 useless extension candidates. Maximal degree in co-relation 14365. Up to 860 conditions per place. [2024-06-21 15:43:31,339 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 126 selfloop transitions, 26 changer transitions 1/256 dead transitions. [2024-06-21 15:43:31,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 256 transitions, 3511 flow [2024-06-21 15:43:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 238 transitions. [2024-06-21 15:43:31,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7104477611940299 [2024-06-21 15:43:31,341 INFO L175 Difference]: Start difference. First operand has 223 places, 236 transitions, 2902 flow. Second operand 5 states and 238 transitions. [2024-06-21 15:43:31,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 256 transitions, 3511 flow [2024-06-21 15:43:31,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 256 transitions, 3449 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:31,531 INFO L231 Difference]: Finished difference. Result has 227 places, 239 transitions, 2996 flow [2024-06-21 15:43:31,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2996, PETRI_PLACES=227, PETRI_TRANSITIONS=239} [2024-06-21 15:43:31,531 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 167 predicate places. [2024-06-21 15:43:31,531 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 239 transitions, 2996 flow [2024-06-21 15:43:31,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:31,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:31,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:31,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 15:43:31,532 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:31,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:31,532 INFO L85 PathProgramCache]: Analyzing trace with hash -580150066, now seen corresponding path program 1 times [2024-06-21 15:43:31,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:31,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411166796] [2024-06-21 15:43:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:31,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:31,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:31,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411166796] [2024-06-21 15:43:31,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411166796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:31,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:31,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:31,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957597135] [2024-06-21 15:43:31,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:31,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:31,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:31,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:31,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:31,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:31,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 239 transitions, 2996 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:31,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:31,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:31,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:31,932 INFO L124 PetriNetUnfolderBase]: 1072/2662 cut-off events. [2024-06-21 15:43:31,932 INFO L125 PetriNetUnfolderBase]: For 82027/82165 co-relation queries the response was YES. [2024-06-21 15:43:31,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15656 conditions, 2662 events. 1072/2662 cut-off events. For 82027/82165 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 19250 event pairs, 323 based on Foata normal form. 33/2647 useless extension candidates. Maximal degree in co-relation 14311. Up to 835 conditions per place. [2024-06-21 15:43:31,956 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 112 selfloop transitions, 35 changer transitions 9/255 dead transitions. [2024-06-21 15:43:31,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 255 transitions, 3521 flow [2024-06-21 15:43:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2024-06-21 15:43:31,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6985074626865672 [2024-06-21 15:43:31,957 INFO L175 Difference]: Start difference. First operand has 227 places, 239 transitions, 2996 flow. Second operand 5 states and 234 transitions. [2024-06-21 15:43:31,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 255 transitions, 3521 flow [2024-06-21 15:43:32,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 255 transitions, 3439 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:32,146 INFO L231 Difference]: Finished difference. Result has 229 places, 231 transitions, 2883 flow [2024-06-21 15:43:32,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2883, PETRI_PLACES=229, PETRI_TRANSITIONS=231} [2024-06-21 15:43:32,147 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 169 predicate places. [2024-06-21 15:43:32,147 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 231 transitions, 2883 flow [2024-06-21 15:43:32,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:32,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:32,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:32,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 15:43:32,147 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:32,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:32,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1269845506, now seen corresponding path program 2 times [2024-06-21 15:43:32,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:32,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342213029] [2024-06-21 15:43:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:32,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:32,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:32,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342213029] [2024-06-21 15:43:32,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342213029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:32,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:32,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:32,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912402978] [2024-06-21 15:43:32,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:32,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:32,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:32,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:32,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:32,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 231 transitions, 2883 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:32,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:32,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:32,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:32,528 INFO L124 PetriNetUnfolderBase]: 1046/2627 cut-off events. [2024-06-21 15:43:32,528 INFO L125 PetriNetUnfolderBase]: For 76843/76973 co-relation queries the response was YES. [2024-06-21 15:43:32,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15189 conditions, 2627 events. 1046/2627 cut-off events. For 76843/76973 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 19044 event pairs, 336 based on Foata normal form. 28/2609 useless extension candidates. Maximal degree in co-relation 13927. Up to 868 conditions per place. [2024-06-21 15:43:32,550 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 105 selfloop transitions, 18 changer transitions 35/244 dead transitions. [2024-06-21 15:43:32,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 244 transitions, 3377 flow [2024-06-21 15:43:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-06-21 15:43:32,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6895522388059702 [2024-06-21 15:43:32,551 INFO L175 Difference]: Start difference. First operand has 229 places, 231 transitions, 2883 flow. Second operand 5 states and 231 transitions. [2024-06-21 15:43:32,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 244 transitions, 3377 flow [2024-06-21 15:43:32,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 244 transitions, 3231 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:43:32,756 INFO L231 Difference]: Finished difference. Result has 228 places, 198 transitions, 2367 flow [2024-06-21 15:43:32,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2367, PETRI_PLACES=228, PETRI_TRANSITIONS=198} [2024-06-21 15:43:32,756 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 168 predicate places. [2024-06-21 15:43:32,756 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 198 transitions, 2367 flow [2024-06-21 15:43:32,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:32,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:32,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:32,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 15:43:32,757 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:32,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:32,757 INFO L85 PathProgramCache]: Analyzing trace with hash 885680432, now seen corresponding path program 2 times [2024-06-21 15:43:32,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:32,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533579991] [2024-06-21 15:43:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:32,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:32,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:32,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533579991] [2024-06-21 15:43:32,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533579991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:32,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:32,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:32,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192195405] [2024-06-21 15:43:32,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:32,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:43:32,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:32,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:43:32,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:43:32,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 67 [2024-06-21 15:43:32,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 198 transitions, 2367 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:32,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:32,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 67 [2024-06-21 15:43:32,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:33,048 INFO L124 PetriNetUnfolderBase]: 761/1848 cut-off events. [2024-06-21 15:43:33,048 INFO L125 PetriNetUnfolderBase]: For 26229/26332 co-relation queries the response was YES. [2024-06-21 15:43:33,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9358 conditions, 1848 events. 761/1848 cut-off events. For 26229/26332 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12386 event pairs, 463 based on Foata normal form. 43/1840 useless extension candidates. Maximal degree in co-relation 8963. Up to 1125 conditions per place. [2024-06-21 15:43:33,061 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 62 selfloop transitions, 0 changer transitions 50/174 dead transitions. [2024-06-21 15:43:33,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 174 transitions, 2248 flow [2024-06-21 15:43:33,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 213 transitions. [2024-06-21 15:43:33,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358208955223881 [2024-06-21 15:43:33,062 INFO L175 Difference]: Start difference. First operand has 228 places, 198 transitions, 2367 flow. Second operand 5 states and 213 transitions. [2024-06-21 15:43:33,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 174 transitions, 2248 flow [2024-06-21 15:43:33,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 174 transitions, 1964 flow, removed 29 selfloop flow, removed 23 redundant places. [2024-06-21 15:43:33,139 INFO L231 Difference]: Finished difference. Result has 205 places, 124 transitions, 1287 flow [2024-06-21 15:43:33,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1287, PETRI_PLACES=205, PETRI_TRANSITIONS=124} [2024-06-21 15:43:33,139 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 145 predicate places. [2024-06-21 15:43:33,139 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 124 transitions, 1287 flow [2024-06-21 15:43:33,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:33,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:33,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:33,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 15:43:33,140 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:33,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:33,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2064755952, now seen corresponding path program 2 times [2024-06-21 15:43:33,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:33,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734275298] [2024-06-21 15:43:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:33,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:33,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:33,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734275298] [2024-06-21 15:43:33,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734275298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:33,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:33,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:33,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332210783] [2024-06-21 15:43:33,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:33,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:33,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:33,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:33,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:33,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:33,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 124 transitions, 1287 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:33,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:33,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:33,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:33,350 INFO L124 PetriNetUnfolderBase]: 450/1213 cut-off events. [2024-06-21 15:43:33,351 INFO L125 PetriNetUnfolderBase]: For 25209/25287 co-relation queries the response was YES. [2024-06-21 15:43:33,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5927 conditions, 1213 events. 450/1213 cut-off events. For 25209/25287 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7555 event pairs, 191 based on Foata normal form. 26/1220 useless extension candidates. Maximal degree in co-relation 5856. Up to 458 conditions per place. [2024-06-21 15:43:33,359 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 59 selfloop transitions, 10 changer transitions 34/135 dead transitions. [2024-06-21 15:43:33,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 135 transitions, 1637 flow [2024-06-21 15:43:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:33,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 224 transitions. [2024-06-21 15:43:33,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6686567164179105 [2024-06-21 15:43:33,361 INFO L175 Difference]: Start difference. First operand has 205 places, 124 transitions, 1287 flow. Second operand 5 states and 224 transitions. [2024-06-21 15:43:33,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 135 transitions, 1637 flow [2024-06-21 15:43:33,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 135 transitions, 1499 flow, removed 45 selfloop flow, removed 16 redundant places. [2024-06-21 15:43:33,406 INFO L231 Difference]: Finished difference. Result has 179 places, 93 transitions, 935 flow [2024-06-21 15:43:33,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=935, PETRI_PLACES=179, PETRI_TRANSITIONS=93} [2024-06-21 15:43:33,407 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 119 predicate places. [2024-06-21 15:43:33,407 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 93 transitions, 935 flow [2024-06-21 15:43:33,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:33,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:33,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:33,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 15:43:33,408 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:33,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash 312717273, now seen corresponding path program 1 times [2024-06-21 15:43:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:33,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676876868] [2024-06-21 15:43:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:33,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:33,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:33,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676876868] [2024-06-21 15:43:33,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676876868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:33,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:33,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:33,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108680887] [2024-06-21 15:43:33,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:33,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:33,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:33,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:33,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:33,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:33,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 93 transitions, 935 flow. Second operand has 5 states, 5 states have (on average 39.4) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:33,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:33,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:33,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:33,592 INFO L124 PetriNetUnfolderBase]: 354/956 cut-off events. [2024-06-21 15:43:33,592 INFO L125 PetriNetUnfolderBase]: For 14162/14217 co-relation queries the response was YES. [2024-06-21 15:43:33,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4269 conditions, 956 events. 354/956 cut-off events. For 14162/14217 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5527 event pairs, 93 based on Foata normal form. 26/973 useless extension candidates. Maximal degree in co-relation 4209. Up to 294 conditions per place. [2024-06-21 15:43:33,597 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 52 selfloop transitions, 22 changer transitions 2/108 dead transitions. [2024-06-21 15:43:33,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 108 transitions, 1245 flow [2024-06-21 15:43:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2024-06-21 15:43:33,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805970149253732 [2024-06-21 15:43:33,597 INFO L175 Difference]: Start difference. First operand has 179 places, 93 transitions, 935 flow. Second operand 5 states and 228 transitions. [2024-06-21 15:43:33,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 108 transitions, 1245 flow [2024-06-21 15:43:33,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 108 transitions, 1099 flow, removed 38 selfloop flow, removed 17 redundant places. [2024-06-21 15:43:33,621 INFO L231 Difference]: Finished difference. Result has 151 places, 93 transitions, 870 flow [2024-06-21 15:43:33,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=870, PETRI_PLACES=151, PETRI_TRANSITIONS=93} [2024-06-21 15:43:33,622 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 91 predicate places. [2024-06-21 15:43:33,622 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 93 transitions, 870 flow [2024-06-21 15:43:33,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.4) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:33,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:33,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:33,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 15:43:33,622 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:33,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:33,623 INFO L85 PathProgramCache]: Analyzing trace with hash 454639271, now seen corresponding path program 1 times [2024-06-21 15:43:33,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:33,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887152912] [2024-06-21 15:43:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:33,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:33,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:33,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887152912] [2024-06-21 15:43:33,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887152912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:33,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:33,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:33,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714930728] [2024-06-21 15:43:33,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:33,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:33,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:33,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:33,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:33,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:33,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 93 transitions, 870 flow. Second operand has 5 states, 5 states have (on average 39.4) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:33,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:33,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:33,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:33,783 INFO L124 PetriNetUnfolderBase]: 351/937 cut-off events. [2024-06-21 15:43:33,783 INFO L125 PetriNetUnfolderBase]: For 8915/8953 co-relation queries the response was YES. [2024-06-21 15:43:33,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3724 conditions, 937 events. 351/937 cut-off events. For 8915/8953 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5336 event pairs, 151 based on Foata normal form. 26/960 useless extension candidates. Maximal degree in co-relation 3673. Up to 391 conditions per place. [2024-06-21 15:43:33,787 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 52 selfloop transitions, 18 changer transitions 2/104 dead transitions. [2024-06-21 15:43:33,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 104 transitions, 1092 flow [2024-06-21 15:43:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2024-06-21 15:43:33,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6597014925373135 [2024-06-21 15:43:33,788 INFO L175 Difference]: Start difference. First operand has 151 places, 93 transitions, 870 flow. Second operand 5 states and 221 transitions. [2024-06-21 15:43:33,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 104 transitions, 1092 flow [2024-06-21 15:43:33,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 104 transitions, 1037 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 15:43:33,808 INFO L231 Difference]: Finished difference. Result has 150 places, 93 transitions, 860 flow [2024-06-21 15:43:33,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=860, PETRI_PLACES=150, PETRI_TRANSITIONS=93} [2024-06-21 15:43:33,808 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 90 predicate places. [2024-06-21 15:43:33,808 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 93 transitions, 860 flow [2024-06-21 15:43:33,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.4) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:33,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:33,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:33,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 15:43:33,809 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:33,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:33,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1218674732, now seen corresponding path program 1 times [2024-06-21 15:43:33,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:33,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020484721] [2024-06-21 15:43:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:33,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:33,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:33,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020484721] [2024-06-21 15:43:33,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020484721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:33,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:33,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:33,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875013297] [2024-06-21 15:43:33,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:33,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:33,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:33,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:33,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:33,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:33,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 93 transitions, 860 flow. Second operand has 5 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:33,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:33,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:33,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:33,954 INFO L124 PetriNetUnfolderBase]: 338/910 cut-off events. [2024-06-21 15:43:33,954 INFO L125 PetriNetUnfolderBase]: For 7774/7809 co-relation queries the response was YES. [2024-06-21 15:43:33,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 910 events. 338/910 cut-off events. For 7774/7809 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5218 event pairs, 85 based on Foata normal form. 26/931 useless extension candidates. Maximal degree in co-relation 3454. Up to 260 conditions per place. [2024-06-21 15:43:33,957 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 36 selfloop transitions, 10 changer transitions 38/107 dead transitions. [2024-06-21 15:43:33,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 107 transitions, 1096 flow [2024-06-21 15:43:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2024-06-21 15:43:33,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776119402985075 [2024-06-21 15:43:33,958 INFO L175 Difference]: Start difference. First operand has 150 places, 93 transitions, 860 flow. Second operand 5 states and 227 transitions. [2024-06-21 15:43:33,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 107 transitions, 1096 flow [2024-06-21 15:43:33,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 107 transitions, 1059 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:33,972 INFO L231 Difference]: Finished difference. Result has 152 places, 63 transitions, 557 flow [2024-06-21 15:43:33,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=557, PETRI_PLACES=152, PETRI_TRANSITIONS=63} [2024-06-21 15:43:33,973 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 92 predicate places. [2024-06-21 15:43:33,973 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 63 transitions, 557 flow [2024-06-21 15:43:33,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:33,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:33,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:33,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 15:43:33,973 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:33,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:33,973 INFO L85 PathProgramCache]: Analyzing trace with hash 816148400, now seen corresponding path program 1 times [2024-06-21 15:43:33,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:33,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767408084] [2024-06-21 15:43:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:33,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:34,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:34,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767408084] [2024-06-21 15:43:34,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767408084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:34,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:34,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:34,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616779224] [2024-06-21 15:43:34,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:34,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:34,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:34,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:34,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:34,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:34,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 63 transitions, 557 flow. Second operand has 5 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:34,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:34,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:34,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:34,087 INFO L124 PetriNetUnfolderBase]: 159/424 cut-off events. [2024-06-21 15:43:34,088 INFO L125 PetriNetUnfolderBase]: For 5117/5139 co-relation queries the response was YES. [2024-06-21 15:43:34,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1774 conditions, 424 events. 159/424 cut-off events. For 5117/5139 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1817 event pairs, 46 based on Foata normal form. 18/433 useless extension candidates. Maximal degree in co-relation 1724. Up to 129 conditions per place. [2024-06-21 15:43:34,089 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 33 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-21 15:43:34,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 68 transitions, 657 flow [2024-06-21 15:43:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-06-21 15:43:34,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6298507462686567 [2024-06-21 15:43:34,090 INFO L175 Difference]: Start difference. First operand has 152 places, 63 transitions, 557 flow. Second operand 5 states and 211 transitions. [2024-06-21 15:43:34,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 68 transitions, 657 flow [2024-06-21 15:43:34,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 68 transitions, 484 flow, removed 19 selfloop flow, removed 44 redundant places. [2024-06-21 15:43:34,096 INFO L231 Difference]: Finished difference. Result has 98 places, 63 transitions, 412 flow [2024-06-21 15:43:34,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=412, PETRI_PLACES=98, PETRI_TRANSITIONS=63} [2024-06-21 15:43:34,096 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 38 predicate places. [2024-06-21 15:43:34,096 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 63 transitions, 412 flow [2024-06-21 15:43:34,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:34,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:34,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:34,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 15:43:34,096 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:43:34,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:34,097 INFO L85 PathProgramCache]: Analyzing trace with hash -264753018, now seen corresponding path program 1 times [2024-06-21 15:43:34,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:34,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447073750] [2024-06-21 15:43:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:34,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:34,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:34,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447073750] [2024-06-21 15:43:34,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447073750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:34,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:34,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:34,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718203356] [2024-06-21 15:43:34,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:34,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:34,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:34,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:34,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:34,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-21 15:43:34,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 63 transitions, 412 flow. Second operand has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:34,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:34,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-21 15:43:34,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:34,221 INFO L124 PetriNetUnfolderBase]: 143/399 cut-off events. [2024-06-21 15:43:34,221 INFO L125 PetriNetUnfolderBase]: For 2045/2063 co-relation queries the response was YES. [2024-06-21 15:43:34,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222 conditions, 399 events. 143/399 cut-off events. For 2045/2063 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1753 event pairs, 62 based on Foata normal form. 22/413 useless extension candidates. Maximal degree in co-relation 1192. Up to 154 conditions per place. [2024-06-21 15:43:34,222 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 0 selfloop transitions, 0 changer transitions 67/67 dead transitions. [2024-06-21 15:43:34,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 67 transitions, 474 flow [2024-06-21 15:43:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 209 transitions. [2024-06-21 15:43:34,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238805970149254 [2024-06-21 15:43:34,223 INFO L175 Difference]: Start difference. First operand has 98 places, 63 transitions, 412 flow. Second operand 5 states and 209 transitions. [2024-06-21 15:43:34,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 67 transitions, 474 flow [2024-06-21 15:43:34,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 67 transitions, 398 flow, removed 0 selfloop flow, removed 21 redundant places. [2024-06-21 15:43:34,225 INFO L231 Difference]: Finished difference. Result has 80 places, 0 transitions, 0 flow [2024-06-21 15:43:34,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=80, PETRI_TRANSITIONS=0} [2024-06-21 15:43:34,226 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-06-21 15:43:34,226 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 0 transitions, 0 flow [2024-06-21 15:43:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:34,228 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 15:43:34,229 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 15:43:34,229 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 15:43:34,229 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 15:43:34,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 15:43:34,229 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:34,231 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 15:43:34,232 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 15:43:34,234 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 15:43:34,235 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 15:43:34,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 03:43:34 BasicIcfg [2024-06-21 15:43:34,235 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 15:43:34,236 INFO L158 Benchmark]: Toolchain (without parser) took 38663.72ms. Allocated memory was 134.2MB in the beginning and 2.5GB in the end (delta: 2.3GB). Free memory was 75.5MB in the beginning and 2.3GB in the end (delta: -2.3GB). Peak memory consumption was 79.1MB. Max. memory is 16.1GB. [2024-06-21 15:43:34,236 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 134.2MB. Free memory is still 100.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 15:43:34,236 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 134.2MB. Free memory is still 97.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 15:43:34,236 INFO L158 Benchmark]: CACSL2BoogieTranslator took 440.68ms. Allocated memory is still 134.2MB. Free memory was 75.3MB in the beginning and 49.1MB in the end (delta: 26.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-21 15:43:34,236 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.99ms. Allocated memory is still 134.2MB. Free memory was 49.1MB in the beginning and 46.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 15:43:34,237 INFO L158 Benchmark]: Boogie Preprocessor took 44.67ms. Allocated memory is still 134.2MB. Free memory was 46.9MB in the beginning and 44.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 15:43:34,237 INFO L158 Benchmark]: RCFGBuilder took 390.98ms. Allocated memory is still 134.2MB. Free memory was 44.6MB in the beginning and 87.7MB in the end (delta: -43.1MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2024-06-21 15:43:34,237 INFO L158 Benchmark]: TraceAbstraction took 37741.50ms. Allocated memory was 134.2MB in the beginning and 2.5GB in the end (delta: 2.3GB). Free memory was 86.7MB in the beginning and 2.3GB in the end (delta: -2.3GB). Peak memory consumption was 88.3MB. Max. memory is 16.1GB. [2024-06-21 15:43:34,238 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 134.2MB. Free memory is still 100.8MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 134.2MB. Free memory is still 97.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 440.68ms. Allocated memory is still 134.2MB. Free memory was 75.3MB in the beginning and 49.1MB in the end (delta: 26.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.99ms. Allocated memory is still 134.2MB. Free memory was 49.1MB in the beginning and 46.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.67ms. Allocated memory is still 134.2MB. Free memory was 46.9MB in the beginning and 44.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 390.98ms. Allocated memory is still 134.2MB. Free memory was 44.6MB in the beginning and 87.7MB in the end (delta: -43.1MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. * TraceAbstraction took 37741.50ms. Allocated memory was 134.2MB in the beginning and 2.5GB in the end (delta: 2.3GB). Free memory was 86.7MB in the beginning and 2.3GB in the end (delta: -2.3GB). Peak memory consumption was 88.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 819]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 820]: 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, 104 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: 37.6s, OverallIterations: 59, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 35.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6712 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4314 mSDsluCounter, 2513 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1873 mSDsCounter, 347 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8723 IncrementalHoareTripleChecker+Invalid, 9070 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 347 mSolverCounterUnsat, 640 mSDtfsCounter, 8723 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3655occurred in iteration=38, InterpolantAutomatonStates: 287, 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: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 1142 NumberOfCodeBlocks, 1142 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 1083 ConstructedInterpolants, 0 QuantifiedInterpolants, 3625 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 59 InterpolantComputations, 59 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! [2024-06-21 15:43:34,258 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