./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 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-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-7724a2d-m [2024-06-27 19:17:47,925 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:17:47,990 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:17:47,994 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:17:47,994 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:17:48,020 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:17:48,021 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:17:48,021 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:17:48,022 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:17:48,026 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:17:48,027 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:17:48,027 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:17:48,028 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:17:48,029 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:17:48,029 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:17:48,029 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:17:48,030 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:17:48,030 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:17:48,030 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:17:48,030 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:17:48,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:17:48,031 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:17:48,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:17:48,031 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:17:48,031 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:17:48,032 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:17:48,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:17:48,032 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:17:48,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:17:48,033 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:17:48,033 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:17:48,034 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:17:48,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:17:48,034 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:17:48,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:17:48,034 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:17:48,035 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:17:48,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:17:48,035 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:17:48,035 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:17:48,035 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:17:48,036 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:17:48,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:17:48,036 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:17:48,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:17:48,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:17:48,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:17:48,247 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:17:48,247 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:17:48,248 INFO L431 ainManager$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 [2024-06-27 19:17:48,355 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:17:48,356 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:17:48,356 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/szymanski.i [2024-06-27 19:17:49,280 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:17:49,491 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:17:49,492 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i [2024-06-27 19:17:49,500 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c90bd1de4/30fae76955524f6f8a6d5fae54977758/FLAG518783097 [2024-06-27 19:17:49,510 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c90bd1de4/30fae76955524f6f8a6d5fae54977758 [2024-06-27 19:17:49,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:17:49,511 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:17:49,512 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:17:49,513 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:17:49,517 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:17:49,517 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:17:48" (1/2) ... [2024-06-27 19:17:49,518 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1355f82 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:17:49, skipping insertion in model container [2024-06-27 19:17:49,518 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:17:48" (1/2) ... [2024-06-27 19:17:49,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@509012ac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:17:49, skipping insertion in model container [2024-06-27 19:17:49,520 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:17:49" (2/2) ... [2024-06-27 19:17:49,520 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1355f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49, skipping insertion in model container [2024-06-27 19:17:49,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:17:49" (2/2) ... [2024-06-27 19:17:49,521 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:17:49,548 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:17:49,549 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)) [2024-06-27 19:17:49,549 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)) [2024-06-27 19:17:49,549 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:17:49,549 INFO L106 edCorrectnessWitness]: ghost_update [L818-L818] multithreaded = 1; [2024-06-27 19:17:49,582 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:17:49,819 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:17:49,827 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:17:49,909 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:17:49,944 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:17:49,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49 WrapperNode [2024-06-27 19:17:49,945 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:17:49,946 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:17:49,947 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:17:49,947 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:17:49,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:49,985 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:50,017 INFO L138 Inliner]: procedures = 169, calls = 66, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 170 [2024-06-27 19:17:50,018 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:17:50,019 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:17:50,019 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:17:50,019 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:17:50,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:50,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:50,040 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:50,057 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 19:17:50,058 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:50,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:50,066 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:50,070 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:50,071 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:50,075 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:50,077 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:17:50,077 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:17:50,077 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:17:50,077 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:17:50,078 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (1/1) ... [2024-06-27 19:17:50,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:17:50,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:17:50,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 19:17:50,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 19:17:50,136 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-06-27 19:17:50,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-06-27 19:17:50,137 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-27 19:17:50,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-27 19:17:50,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:17:50,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:17:50,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:17:50,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:17:50,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:17:50,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:17:50,139 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:17:50,234 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:17:50,235 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:17:50,380 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:17:50,380 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:17:50,450 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:17:50,460 INFO L320 CfgBuilder]: Removed 8 assume(true) statements. [2024-06-27 19:17:50,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:17:50 BoogieIcfgContainer [2024-06-27 19:17:50,462 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:17:50,463 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:17:50,464 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:17:50,466 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:17:50,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:17:48" (1/4) ... [2024-06-27 19:17:50,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f2e2fe3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:17:50, skipping insertion in model container [2024-06-27 19:17:50,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:17:49" (2/4) ... [2024-06-27 19:17:50,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f2e2fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:17:50, skipping insertion in model container [2024-06-27 19:17:50,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:17:49" (3/4) ... [2024-06-27 19:17:50,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f2e2fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:17:50, skipping insertion in model container [2024-06-27 19:17:50,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:17:50" (4/4) ... [2024-06-27 19:17:50,471 INFO L112 eAbstractionObserver]: Analyzing ICFG szymanski.i [2024-06-27 19:17:50,485 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:17:50,485 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 19:17:50,485 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:17:50,540 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 19:17:50,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 67 transitions, 148 flow [2024-06-27 19:17:50,616 INFO L124 PetriNetUnfolderBase]: 10/65 cut-off events. [2024-06-27 19:17:50,616 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 19:17:50,619 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. [2024-06-27 19:17:50,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 67 transitions, 148 flow [2024-06-27 19:17:50,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 63 transitions, 135 flow [2024-06-27 19:17:50,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:17:50,641 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;@54dbb2ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:17:50,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 19:17:50,646 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:17:50,646 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:17:50,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:17:50,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:50,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:17:50,647 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)] === [2024-06-27 19:17:50,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:50,654 INFO L85 PathProgramCache]: Analyzing trace with hash 304155473, now seen corresponding path program 1 times [2024-06-27 19:17:50,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:50,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317303260] [2024-06-27 19:17:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:50,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:50,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:50,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317303260] [2024-06-27 19:17:50,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317303260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:50,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:50,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:17:50,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429527772] [2024-06-27 19:17:50,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:50,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:17:50,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:50,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:17:50,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:17:51,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 67 [2024-06-27 19:17:51,014 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) [2024-06-27 19:17:51,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:51,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 67 [2024-06-27 19:17:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:51,175 INFO L124 PetriNetUnfolderBase]: 616/1312 cut-off events. [2024-06-27 19:17:51,175 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 19:17:51,181 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. [2024-06-27 19:17:51,188 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 30 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2024-06-27 19:17:51,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 216 flow [2024-06-27 19:17:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:17:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:17:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2024-06-27 19:17:51,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7412935323383084 [2024-06-27 19:17:51,199 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 135 flow. Second operand 3 states and 149 transitions. [2024-06-27 19:17:51,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 216 flow [2024-06-27 19:17:51,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 210 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:17:51,204 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 151 flow [2024-06-27 19:17:51,206 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} [2024-06-27 19:17:51,209 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-06-27 19:17:51,210 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 151 flow [2024-06-27 19:17:51,210 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) [2024-06-27 19:17:51,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:51,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:51,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:17:51,211 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)] === [2024-06-27 19:17:51,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:51,212 INFO L85 PathProgramCache]: Analyzing trace with hash 235692848, now seen corresponding path program 1 times [2024-06-27 19:17:51,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:51,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345843977] [2024-06-27 19:17:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:51,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:51,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:51,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345843977] [2024-06-27 19:17:51,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345843977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:51,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:51,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:17:51,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648179544] [2024-06-27 19:17:51,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:51,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:17:51,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:51,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:17:51,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:17:51,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-27 19:17:51,363 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) [2024-06-27 19:17:51,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:51,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-27 19:17:51,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:51,574 INFO L124 PetriNetUnfolderBase]: 672/1435 cut-off events. [2024-06-27 19:17:51,575 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2024-06-27 19:17:51,577 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. [2024-06-27 19:17:51,582 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 40 selfloop transitions, 6 changer transitions 1/82 dead transitions. [2024-06-27 19:17:51,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 286 flow [2024-06-27 19:17:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:17:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:17:51,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-06-27 19:17:51,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313432835820896 [2024-06-27 19:17:51,590 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 151 flow. Second operand 4 states and 196 transitions. [2024-06-27 19:17:51,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 286 flow [2024-06-27 19:17:51,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 82 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:17:51,593 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 175 flow [2024-06-27 19:17:51,594 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} [2024-06-27 19:17:51,595 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-06-27 19:17:51,595 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 175 flow [2024-06-27 19:17:51,595 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) [2024-06-27 19:17:51,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:51,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:51,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:17:51,596 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)] === [2024-06-27 19:17:51,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:51,599 INFO L85 PathProgramCache]: Analyzing trace with hash 964039940, now seen corresponding path program 1 times [2024-06-27 19:17:51,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:51,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017201589] [2024-06-27 19:17:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:51,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:51,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:51,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017201589] [2024-06-27 19:17:51,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017201589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:51,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:51,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:17:51,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661107453] [2024-06-27 19:17:51,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:51,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:17:51,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:51,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:17:51,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:17:51,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-27 19:17:51,720 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) [2024-06-27 19:17:51,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:51,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-27 19:17:51,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:51,835 INFO L124 PetriNetUnfolderBase]: 676/1460 cut-off events. [2024-06-27 19:17:51,835 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2024-06-27 19:17:51,839 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. [2024-06-27 19:17:51,844 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 40 selfloop transitions, 8 changer transitions 1/84 dead transitions. [2024-06-27 19:17:51,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 318 flow [2024-06-27 19:17:51,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:17:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:17:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2024-06-27 19:17:51,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7350746268656716 [2024-06-27 19:17:51,846 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 175 flow. Second operand 4 states and 197 transitions. [2024-06-27 19:17:51,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 318 flow [2024-06-27 19:17:51,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 311 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 19:17:51,851 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 206 flow [2024-06-27 19:17:51,851 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} [2024-06-27 19:17:51,852 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2024-06-27 19:17:51,852 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 206 flow [2024-06-27 19:17:51,852 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) [2024-06-27 19:17:51,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:51,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:51,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:17:51,853 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)] === [2024-06-27 19:17:51,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2121866509, now seen corresponding path program 1 times [2024-06-27 19:17:51,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:51,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324902371] [2024-06-27 19:17:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:51,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:51,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:51,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324902371] [2024-06-27 19:17:51,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324902371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:51,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:51,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:17:51,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154327900] [2024-06-27 19:17:51,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:51,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:17:51,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:51,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:17:51,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:17:51,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-27 19:17:51,990 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) [2024-06-27 19:17:51,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:51,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-27 19:17:51,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:52,099 INFO L124 PetriNetUnfolderBase]: 667/1384 cut-off events. [2024-06-27 19:17:52,100 INFO L125 PetriNetUnfolderBase]: For 855/863 co-relation queries the response was YES. [2024-06-27 19:17:52,103 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. [2024-06-27 19:17:52,108 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 42 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-06-27 19:17:52,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 344 flow [2024-06-27 19:17:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:17:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:17:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-06-27 19:17:52,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7164179104477612 [2024-06-27 19:17:52,110 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 206 flow. Second operand 4 states and 192 transitions. [2024-06-27 19:17:52,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 344 flow [2024-06-27 19:17:52,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 337 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 19:17:52,114 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 242 flow [2024-06-27 19:17:52,114 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} [2024-06-27 19:17:52,115 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2024-06-27 19:17:52,116 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 242 flow [2024-06-27 19:17:52,116 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) [2024-06-27 19:17:52,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:52,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:52,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:17:52,117 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)] === [2024-06-27 19:17:52,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash -281575216, now seen corresponding path program 1 times [2024-06-27 19:17:52,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:52,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563243611] [2024-06-27 19:17:52,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:52,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:52,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:52,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563243611] [2024-06-27 19:17:52,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563243611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:52,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:52,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:52,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286237195] [2024-06-27 19:17:52,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:52,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:17:52,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:52,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:17:52,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:17:52,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:17:52,261 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) [2024-06-27 19:17:52,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:52,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:17:52,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:52,385 INFO L124 PetriNetUnfolderBase]: 786/1570 cut-off events. [2024-06-27 19:17:52,385 INFO L125 PetriNetUnfolderBase]: For 1611/1611 co-relation queries the response was YES. [2024-06-27 19:17:52,389 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. [2024-06-27 19:17:52,395 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 58 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-06-27 19:17:52,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 479 flow [2024-06-27 19:17:52,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-27 19:17:52,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7253731343283583 [2024-06-27 19:17:52,396 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 242 flow. Second operand 5 states and 243 transitions. [2024-06-27 19:17:52,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 479 flow [2024-06-27 19:17:52,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 105 transitions, 477 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 19:17:52,423 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 300 flow [2024-06-27 19:17:52,424 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} [2024-06-27 19:17:52,428 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2024-06-27 19:17:52,429 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 300 flow [2024-06-27 19:17:52,429 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) [2024-06-27 19:17:52,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:52,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:52,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:17:52,430 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)] === [2024-06-27 19:17:52,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:52,431 INFO L85 PathProgramCache]: Analyzing trace with hash -834636588, now seen corresponding path program 2 times [2024-06-27 19:17:52,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:52,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42395337] [2024-06-27 19:17:52,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:52,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:52,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:52,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42395337] [2024-06-27 19:17:52,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42395337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:52,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:52,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:52,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703939582] [2024-06-27 19:17:52,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:52,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:17:52,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:52,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:17:52,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:17:52,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:17:52,550 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) [2024-06-27 19:17:52,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:52,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:17:52,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:52,735 INFO L124 PetriNetUnfolderBase]: 805/1614 cut-off events. [2024-06-27 19:17:52,736 INFO L125 PetriNetUnfolderBase]: For 2567/2575 co-relation queries the response was YES. [2024-06-27 19:17:52,740 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. [2024-06-27 19:17:52,746 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 59 selfloop transitions, 15 changer transitions 0/108 dead transitions. [2024-06-27 19:17:52,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 546 flow [2024-06-27 19:17:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-27 19:17:52,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283582089552239 [2024-06-27 19:17:52,748 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 300 flow. Second operand 5 states and 244 transitions. [2024-06-27 19:17:52,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 546 flow [2024-06-27 19:17:52,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 108 transitions, 540 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 19:17:52,755 INFO L231 Difference]: Finished difference. Result has 81 places, 81 transitions, 343 flow [2024-06-27 19:17:52,755 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} [2024-06-27 19:17:52,758 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2024-06-27 19:17:52,758 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 81 transitions, 343 flow [2024-06-27 19:17:52,758 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) [2024-06-27 19:17:52,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:52,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:52,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:17:52,759 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)] === [2024-06-27 19:17:52,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:52,759 INFO L85 PathProgramCache]: Analyzing trace with hash 932536177, now seen corresponding path program 1 times [2024-06-27 19:17:52,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:52,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139097797] [2024-06-27 19:17:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:52,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:52,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:52,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139097797] [2024-06-27 19:17:52,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139097797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:52,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:52,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:52,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40345043] [2024-06-27 19:17:52,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:52,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:17:52,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:17:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:17:52,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 67 [2024-06-27 19:17:52,835 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) [2024-06-27 19:17:52,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:52,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 67 [2024-06-27 19:17:52,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:53,062 INFO L124 PetriNetUnfolderBase]: 1309/2777 cut-off events. [2024-06-27 19:17:53,063 INFO L125 PetriNetUnfolderBase]: For 2488/2524 co-relation queries the response was YES. [2024-06-27 19:17:53,069 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. [2024-06-27 19:17:53,078 INFO L140 encePairwiseOnDemand]: 50/67 looper letters, 78 selfloop transitions, 20 changer transitions 2/136 dead transitions. [2024-06-27 19:17:53,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 136 transitions, 705 flow [2024-06-27 19:17:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2024-06-27 19:17:53,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7343283582089553 [2024-06-27 19:17:53,080 INFO L175 Difference]: Start difference. First operand has 81 places, 81 transitions, 343 flow. Second operand 5 states and 246 transitions. [2024-06-27 19:17:53,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 136 transitions, 705 flow [2024-06-27 19:17:53,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 668 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:17:53,084 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 464 flow [2024-06-27 19:17:53,085 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} [2024-06-27 19:17:53,085 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 26 predicate places. [2024-06-27 19:17:53,086 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 464 flow [2024-06-27 19:17:53,086 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) [2024-06-27 19:17:53,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:53,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:53,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:17:53,086 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)] === [2024-06-27 19:17:53,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:53,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2138090317, now seen corresponding path program 1 times [2024-06-27 19:17:53,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:53,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056388823] [2024-06-27 19:17:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:53,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:53,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:53,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056388823] [2024-06-27 19:17:53,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056388823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:53,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:53,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:17:53,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264161426] [2024-06-27 19:17:53,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:53,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:17:53,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:17:53,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:17:53,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-27 19:17:53,171 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) [2024-06-27 19:17:53,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:53,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-27 19:17:53,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:53,356 INFO L124 PetriNetUnfolderBase]: 1253/2537 cut-off events. [2024-06-27 19:17:53,356 INFO L125 PetriNetUnfolderBase]: For 5722/5754 co-relation queries the response was YES. [2024-06-27 19:17:53,364 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. [2024-06-27 19:17:53,375 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 50 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-06-27 19:17:53,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 634 flow [2024-06-27 19:17:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:17:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:17:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 194 transitions. [2024-06-27 19:17:53,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7238805970149254 [2024-06-27 19:17:53,377 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 464 flow. Second operand 4 states and 194 transitions. [2024-06-27 19:17:53,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 634 flow [2024-06-27 19:17:53,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 107 transitions, 634 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 19:17:53,384 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 504 flow [2024-06-27 19:17:53,384 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} [2024-06-27 19:17:53,386 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 30 predicate places. [2024-06-27 19:17:53,386 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 504 flow [2024-06-27 19:17:53,386 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) [2024-06-27 19:17:53,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:53,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:53,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:17:53,387 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)] === [2024-06-27 19:17:53,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash 805194971, now seen corresponding path program 1 times [2024-06-27 19:17:53,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:53,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525558792] [2024-06-27 19:17:53,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:53,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:53,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:53,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525558792] [2024-06-27 19:17:53,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525558792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:53,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:53,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:17:53,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608289977] [2024-06-27 19:17:53,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:53,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:17:53,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:17:53,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:17:53,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-27 19:17:53,481 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) [2024-06-27 19:17:53,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:53,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-27 19:17:53,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:53,678 INFO L124 PetriNetUnfolderBase]: 1299/2655 cut-off events. [2024-06-27 19:17:53,678 INFO L125 PetriNetUnfolderBase]: For 7782/7820 co-relation queries the response was YES. [2024-06-27 19:17:53,685 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. [2024-06-27 19:17:53,693 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 51 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2024-06-27 19:17:53,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 108 transitions, 671 flow [2024-06-27 19:17:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:17:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:17:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 193 transitions. [2024-06-27 19:17:53,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7201492537313433 [2024-06-27 19:17:53,694 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 504 flow. Second operand 4 states and 193 transitions. [2024-06-27 19:17:53,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 108 transitions, 671 flow [2024-06-27 19:17:53,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 108 transitions, 662 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 19:17:53,700 INFO L231 Difference]: Finished difference. Result has 93 places, 99 transitions, 536 flow [2024-06-27 19:17:53,700 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} [2024-06-27 19:17:53,701 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 33 predicate places. [2024-06-27 19:17:53,701 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 99 transitions, 536 flow [2024-06-27 19:17:53,701 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) [2024-06-27 19:17:53,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:53,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:53,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:17:53,702 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)] === [2024-06-27 19:17:53,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:53,702 INFO L85 PathProgramCache]: Analyzing trace with hash 467124902, now seen corresponding path program 1 times [2024-06-27 19:17:53,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:53,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441732716] [2024-06-27 19:17:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:53,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:53,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:53,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441732716] [2024-06-27 19:17:53,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441732716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:53,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:53,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:53,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908966617] [2024-06-27 19:17:53,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:53,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:17:53,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:53,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:17:53,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:17:53,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:17:53,783 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) [2024-06-27 19:17:53,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:53,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:17:53,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:54,007 INFO L124 PetriNetUnfolderBase]: 1369/2774 cut-off events. [2024-06-27 19:17:54,007 INFO L125 PetriNetUnfolderBase]: For 9874/9927 co-relation queries the response was YES. [2024-06-27 19:17:54,015 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. [2024-06-27 19:17:54,028 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 67 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2024-06-27 19:17:54,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 130 transitions, 841 flow [2024-06-27 19:17:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-27 19:17:54,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283582089552239 [2024-06-27 19:17:54,030 INFO L175 Difference]: Start difference. First operand has 93 places, 99 transitions, 536 flow. Second operand 5 states and 244 transitions. [2024-06-27 19:17:54,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 130 transitions, 841 flow [2024-06-27 19:17:54,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 130 transitions, 833 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 19:17:54,044 INFO L231 Difference]: Finished difference. Result has 98 places, 105 transitions, 616 flow [2024-06-27 19:17:54,044 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} [2024-06-27 19:17:54,051 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 38 predicate places. [2024-06-27 19:17:54,051 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 105 transitions, 616 flow [2024-06-27 19:17:54,051 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) [2024-06-27 19:17:54,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:54,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:54,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:17:54,052 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)] === [2024-06-27 19:17:54,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1843394658, now seen corresponding path program 2 times [2024-06-27 19:17:54,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:54,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256782442] [2024-06-27 19:17:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:54,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:54,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:54,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256782442] [2024-06-27 19:17:54,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256782442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:54,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:54,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:54,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341862697] [2024-06-27 19:17:54,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:54,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:17:54,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:17:54,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:17:54,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:17:54,138 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) [2024-06-27 19:17:54,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:54,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:17:54,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:54,348 INFO L124 PetriNetUnfolderBase]: 1400/2711 cut-off events. [2024-06-27 19:17:54,349 INFO L125 PetriNetUnfolderBase]: For 13326/13402 co-relation queries the response was YES. [2024-06-27 19:17:54,358 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. [2024-06-27 19:17:54,366 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 65 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-27 19:17:54,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 133 transitions, 930 flow [2024-06-27 19:17:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-27 19:17:54,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283582089552239 [2024-06-27 19:17:54,368 INFO L175 Difference]: Start difference. First operand has 98 places, 105 transitions, 616 flow. Second operand 5 states and 244 transitions. [2024-06-27 19:17:54,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 133 transitions, 930 flow [2024-06-27 19:17:54,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 133 transitions, 920 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-27 19:17:54,379 INFO L231 Difference]: Finished difference. Result has 103 places, 108 transitions, 684 flow [2024-06-27 19:17:54,379 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} [2024-06-27 19:17:54,380 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 43 predicate places. [2024-06-27 19:17:54,380 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 108 transitions, 684 flow [2024-06-27 19:17:54,380 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) [2024-06-27 19:17:54,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:54,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:54,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:17:54,381 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)] === [2024-06-27 19:17:54,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:54,381 INFO L85 PathProgramCache]: Analyzing trace with hash 739008706, now seen corresponding path program 1 times [2024-06-27 19:17:54,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:54,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653864478] [2024-06-27 19:17:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:54,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:54,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653864478] [2024-06-27 19:17:54,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653864478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:54,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:54,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:54,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972387852] [2024-06-27 19:17:54,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:54,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:17:54,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:54,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:17:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:17:54,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:17:54,462 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) [2024-06-27 19:17:54,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:54,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:17:54,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:54,676 INFO L124 PetriNetUnfolderBase]: 1368/2741 cut-off events. [2024-06-27 19:17:54,676 INFO L125 PetriNetUnfolderBase]: For 15703/15744 co-relation queries the response was YES. [2024-06-27 19:17:54,687 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. [2024-06-27 19:17:54,697 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 70 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2024-06-27 19:17:54,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 135 transitions, 993 flow [2024-06-27 19:17:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:54,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-27 19:17:54,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7253731343283583 [2024-06-27 19:17:54,699 INFO L175 Difference]: Start difference. First operand has 103 places, 108 transitions, 684 flow. Second operand 5 states and 243 transitions. [2024-06-27 19:17:54,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 135 transitions, 993 flow [2024-06-27 19:17:54,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 135 transitions, 959 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 19:17:54,715 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 718 flow [2024-06-27 19:17:54,715 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} [2024-06-27 19:17:54,716 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 46 predicate places. [2024-06-27 19:17:54,716 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 718 flow [2024-06-27 19:17:54,716 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) [2024-06-27 19:17:54,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:54,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:54,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:17:54,717 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)] === [2024-06-27 19:17:54,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:54,717 INFO L85 PathProgramCache]: Analyzing trace with hash -648454954, now seen corresponding path program 2 times [2024-06-27 19:17:54,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:54,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709508197] [2024-06-27 19:17:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:54,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:54,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:54,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709508197] [2024-06-27 19:17:54,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709508197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:54,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:54,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:54,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598893157] [2024-06-27 19:17:54,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:54,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:17:54,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:54,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:17:54,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:17:54,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:17:54,820 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) [2024-06-27 19:17:54,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:54,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:17:54,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:55,067 INFO L124 PetriNetUnfolderBase]: 1428/2883 cut-off events. [2024-06-27 19:17:55,067 INFO L125 PetriNetUnfolderBase]: For 19147/19200 co-relation queries the response was YES. [2024-06-27 19:17:55,078 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. [2024-06-27 19:17:55,091 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 74 selfloop transitions, 22 changer transitions 0/142 dead transitions. [2024-06-27 19:17:55,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 142 transitions, 1084 flow [2024-06-27 19:17:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-06-27 19:17:55,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313432835820896 [2024-06-27 19:17:55,093 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 718 flow. Second operand 5 states and 245 transitions. [2024-06-27 19:17:55,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 142 transitions, 1084 flow [2024-06-27 19:17:55,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 142 transitions, 1055 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:17:55,110 INFO L231 Difference]: Finished difference. Result has 109 places, 115 transitions, 774 flow [2024-06-27 19:17:55,111 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} [2024-06-27 19:17:55,111 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 49 predicate places. [2024-06-27 19:17:55,111 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 115 transitions, 774 flow [2024-06-27 19:17:55,111 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) [2024-06-27 19:17:55,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:55,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:55,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:17:55,112 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)] === [2024-06-27 19:17:55,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:55,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1372150578, now seen corresponding path program 1 times [2024-06-27 19:17:55,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:55,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254758166] [2024-06-27 19:17:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:55,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:55,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:55,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254758166] [2024-06-27 19:17:55,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254758166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:55,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:55,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:55,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634446194] [2024-06-27 19:17:55,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:55,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:17:55,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:55,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:17:55,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:17:55,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 67 [2024-06-27 19:17:55,154 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) [2024-06-27 19:17:55,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:55,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 67 [2024-06-27 19:17:55,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:55,501 INFO L124 PetriNetUnfolderBase]: 2236/4439 cut-off events. [2024-06-27 19:17:55,501 INFO L125 PetriNetUnfolderBase]: For 15959/16287 co-relation queries the response was YES. [2024-06-27 19:17:55,518 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. [2024-06-27 19:17:55,532 INFO L140 encePairwiseOnDemand]: 50/67 looper letters, 95 selfloop transitions, 22 changer transitions 1/175 dead transitions. [2024-06-27 19:17:55,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 175 transitions, 1278 flow [2024-06-27 19:17:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-27 19:17:55,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283582089552239 [2024-06-27 19:17:55,533 INFO L175 Difference]: Start difference. First operand has 109 places, 115 transitions, 774 flow. Second operand 5 states and 244 transitions. [2024-06-27 19:17:55,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 175 transitions, 1278 flow [2024-06-27 19:17:55,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 175 transitions, 1250 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 19:17:55,555 INFO L231 Difference]: Finished difference. Result has 115 places, 128 transitions, 911 flow [2024-06-27 19:17:55,555 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} [2024-06-27 19:17:55,555 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 55 predicate places. [2024-06-27 19:17:55,555 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 128 transitions, 911 flow [2024-06-27 19:17:55,556 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) [2024-06-27 19:17:55,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:55,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:55,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:17:55,556 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)] === [2024-06-27 19:17:55,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:55,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1558870414, now seen corresponding path program 1 times [2024-06-27 19:17:55,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:55,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419791845] [2024-06-27 19:17:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:55,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:55,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:55,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419791845] [2024-06-27 19:17:55,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419791845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:55,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:55,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:17:55,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978882364] [2024-06-27 19:17:55,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:55,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:17:55,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:17:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:17:55,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 67 [2024-06-27 19:17:55,628 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) [2024-06-27 19:17:55,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:55,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 67 [2024-06-27 19:17:55,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:56,025 INFO L124 PetriNetUnfolderBase]: 2095/4270 cut-off events. [2024-06-27 19:17:56,026 INFO L125 PetriNetUnfolderBase]: For 36450/36555 co-relation queries the response was YES. [2024-06-27 19:17:56,050 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. [2024-06-27 19:17:56,070 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 65 selfloop transitions, 8 changer transitions 0/134 dead transitions. [2024-06-27 19:17:56,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 134 transitions, 1071 flow [2024-06-27 19:17:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:17:56,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:17:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 189 transitions. [2024-06-27 19:17:56,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7052238805970149 [2024-06-27 19:17:56,071 INFO L175 Difference]: Start difference. First operand has 115 places, 128 transitions, 911 flow. Second operand 4 states and 189 transitions. [2024-06-27 19:17:56,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 134 transitions, 1071 flow [2024-06-27 19:17:56,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 134 transitions, 1071 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 19:17:56,100 INFO L231 Difference]: Finished difference. Result has 119 places, 128 transitions, 932 flow [2024-06-27 19:17:56,100 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} [2024-06-27 19:17:56,101 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 59 predicate places. [2024-06-27 19:17:56,101 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 128 transitions, 932 flow [2024-06-27 19:17:56,101 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) [2024-06-27 19:17:56,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:56,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:56,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:17:56,101 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)] === [2024-06-27 19:17:56,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:56,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1288571381, now seen corresponding path program 1 times [2024-06-27 19:17:56,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:56,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193238696] [2024-06-27 19:17:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:56,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:56,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:56,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193238696] [2024-06-27 19:17:56,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193238696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:56,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:56,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:56,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633229520] [2024-06-27 19:17:56,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:56,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:17:56,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:56,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:17:56,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:17:56,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:17:56,172 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) [2024-06-27 19:17:56,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:56,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:17:56,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:56,519 INFO L124 PetriNetUnfolderBase]: 2197/4383 cut-off events. [2024-06-27 19:17:56,519 INFO L125 PetriNetUnfolderBase]: For 42168/42288 co-relation queries the response was YES. [2024-06-27 19:17:56,535 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. [2024-06-27 19:17:56,550 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 87 selfloop transitions, 18 changer transitions 0/163 dead transitions. [2024-06-27 19:17:56,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 163 transitions, 1359 flow [2024-06-27 19:17:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2024-06-27 19:17:56,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7343283582089553 [2024-06-27 19:17:56,552 INFO L175 Difference]: Start difference. First operand has 119 places, 128 transitions, 932 flow. Second operand 5 states and 246 transitions. [2024-06-27 19:17:56,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 163 transitions, 1359 flow [2024-06-27 19:17:56,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 163 transitions, 1329 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 19:17:56,585 INFO L231 Difference]: Finished difference. Result has 122 places, 134 transitions, 1031 flow [2024-06-27 19:17:56,585 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} [2024-06-27 19:17:56,585 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2024-06-27 19:17:56,585 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 134 transitions, 1031 flow [2024-06-27 19:17:56,586 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) [2024-06-27 19:17:56,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:56,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:56,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:17:56,586 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)] === [2024-06-27 19:17:56,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:56,587 INFO L85 PathProgramCache]: Analyzing trace with hash 553288941, now seen corresponding path program 2 times [2024-06-27 19:17:56,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:56,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411738456] [2024-06-27 19:17:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:56,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:56,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:56,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411738456] [2024-06-27 19:17:56,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411738456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:56,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:56,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:56,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207615704] [2024-06-27 19:17:56,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:56,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:17:56,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:17:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:17:56,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:17:56,666 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) [2024-06-27 19:17:56,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:56,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:17:56,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:57,096 INFO L124 PetriNetUnfolderBase]: 2222/4354 cut-off events. [2024-06-27 19:17:57,097 INFO L125 PetriNetUnfolderBase]: For 50382/50531 co-relation queries the response was YES. [2024-06-27 19:17:57,116 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. [2024-06-27 19:17:57,135 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 79 selfloop transitions, 26 changer transitions 0/163 dead transitions. [2024-06-27 19:17:57,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 163 transitions, 1430 flow [2024-06-27 19:17:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-06-27 19:17:57,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313432835820896 [2024-06-27 19:17:57,136 INFO L175 Difference]: Start difference. First operand has 122 places, 134 transitions, 1031 flow. Second operand 5 states and 245 transitions. [2024-06-27 19:17:57,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 163 transitions, 1430 flow [2024-06-27 19:17:57,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 1411 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 19:17:57,190 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 1145 flow [2024-06-27 19:17:57,190 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} [2024-06-27 19:17:57,190 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 67 predicate places. [2024-06-27 19:17:57,190 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 1145 flow [2024-06-27 19:17:57,191 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) [2024-06-27 19:17:57,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:57,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:57,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:17:57,191 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)] === [2024-06-27 19:17:57,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:57,192 INFO L85 PathProgramCache]: Analyzing trace with hash -422811252, now seen corresponding path program 1 times [2024-06-27 19:17:57,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:57,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920693110] [2024-06-27 19:17:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:57,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:57,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:57,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920693110] [2024-06-27 19:17:57,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920693110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:57,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:57,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:17:57,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028814177] [2024-06-27 19:17:57,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:57,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:17:57,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:57,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:17:57,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:17:57,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 67 [2024-06-27 19:17:57,248 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) [2024-06-27 19:17:57,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:57,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 67 [2024-06-27 19:17:57,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:57,687 INFO L124 PetriNetUnfolderBase]: 2189/4518 cut-off events. [2024-06-27 19:17:57,687 INFO L125 PetriNetUnfolderBase]: For 28626/29051 co-relation queries the response was YES. [2024-06-27 19:17:57,705 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. [2024-06-27 19:17:57,719 INFO L140 encePairwiseOnDemand]: 50/67 looper letters, 88 selfloop transitions, 46 changer transitions 1/196 dead transitions. [2024-06-27 19:17:57,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 196 transitions, 1753 flow [2024-06-27 19:17:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 248 transitions. [2024-06-27 19:17:57,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7402985074626866 [2024-06-27 19:17:57,729 INFO L175 Difference]: Start difference. First operand has 127 places, 138 transitions, 1145 flow. Second operand 5 states and 248 transitions. [2024-06-27 19:17:57,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 196 transitions, 1753 flow [2024-06-27 19:17:57,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 196 transitions, 1710 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 19:17:57,773 INFO L231 Difference]: Finished difference. Result has 132 places, 168 transitions, 1516 flow [2024-06-27 19:17:57,773 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} [2024-06-27 19:17:57,774 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 72 predicate places. [2024-06-27 19:17:57,774 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 168 transitions, 1516 flow [2024-06-27 19:17:57,774 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) [2024-06-27 19:17:57,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:57,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:57,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:17:57,774 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)] === [2024-06-27 19:17:57,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:57,775 INFO L85 PathProgramCache]: Analyzing trace with hash -591332081, now seen corresponding path program 1 times [2024-06-27 19:17:57,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:57,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38292416] [2024-06-27 19:17:57,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:57,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:57,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:57,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38292416] [2024-06-27 19:17:57,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38292416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:57,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:57,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:57,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541588472] [2024-06-27 19:17:57,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:57,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:17:57,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:57,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:17:57,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:17:57,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:17:57,855 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) [2024-06-27 19:17:57,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:57,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:17:57,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:58,423 INFO L124 PetriNetUnfolderBase]: 2504/4970 cut-off events. [2024-06-27 19:17:58,423 INFO L125 PetriNetUnfolderBase]: For 66551/66801 co-relation queries the response was YES. [2024-06-27 19:17:58,451 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. [2024-06-27 19:17:58,478 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 86 selfloop transitions, 26 changer transitions 0/192 dead transitions. [2024-06-27 19:17:58,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 192 transitions, 1902 flow [2024-06-27 19:17:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-27 19:17:58,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7253731343283583 [2024-06-27 19:17:58,481 INFO L175 Difference]: Start difference. First operand has 132 places, 168 transitions, 1516 flow. Second operand 5 states and 243 transitions. [2024-06-27 19:17:58,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 192 transitions, 1902 flow [2024-06-27 19:17:58,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 192 transitions, 1858 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 19:17:58,575 INFO L231 Difference]: Finished difference. Result has 136 places, 169 transitions, 1548 flow [2024-06-27 19:17:58,575 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} [2024-06-27 19:17:58,576 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 76 predicate places. [2024-06-27 19:17:58,576 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 169 transitions, 1548 flow [2024-06-27 19:17:58,576 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) [2024-06-27 19:17:58,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:58,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:58,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:17:58,577 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)] === [2024-06-27 19:17:58,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:58,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1796991592, now seen corresponding path program 2 times [2024-06-27 19:17:58,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:58,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987065489] [2024-06-27 19:17:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:58,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:58,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:58,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987065489] [2024-06-27 19:17:58,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987065489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:58,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:58,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:58,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067501482] [2024-06-27 19:17:58,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:58,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:17:58,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:58,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:17:58,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:17:58,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:17:58,687 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) [2024-06-27 19:17:58,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:58,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:17:58,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:59,266 INFO L124 PetriNetUnfolderBase]: 2485/5001 cut-off events. [2024-06-27 19:17:59,267 INFO L125 PetriNetUnfolderBase]: For 71885/72135 co-relation queries the response was YES. [2024-06-27 19:17:59,286 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. [2024-06-27 19:17:59,304 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 86 selfloop transitions, 32 changer transitions 0/198 dead transitions. [2024-06-27 19:17:59,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 198 transitions, 2021 flow [2024-06-27 19:17:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:17:59,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:17:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-27 19:17:59,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7253731343283583 [2024-06-27 19:17:59,306 INFO L175 Difference]: Start difference. First operand has 136 places, 169 transitions, 1548 flow. Second operand 5 states and 243 transitions. [2024-06-27 19:17:59,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 198 transitions, 2021 flow [2024-06-27 19:17:59,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 198 transitions, 1979 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 19:17:59,386 INFO L231 Difference]: Finished difference. Result has 139 places, 174 transitions, 1644 flow [2024-06-27 19:17:59,387 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} [2024-06-27 19:17:59,387 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 79 predicate places. [2024-06-27 19:17:59,387 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 174 transitions, 1644 flow [2024-06-27 19:17:59,388 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) [2024-06-27 19:17:59,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:17:59,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:17:59,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:17:59,388 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)] === [2024-06-27 19:17:59,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:17:59,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1799342632, now seen corresponding path program 3 times [2024-06-27 19:17:59,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:17:59,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406029078] [2024-06-27 19:17:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:17:59,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:17:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:17:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:17:59,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:17:59,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406029078] [2024-06-27 19:17:59,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406029078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:17:59,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:17:59,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:17:59,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145816847] [2024-06-27 19:17:59,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:17:59,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:17:59,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:17:59,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:17:59,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:17:59,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:17:59,477 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) [2024-06-27 19:17:59,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:17:59,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:17:59,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:17:59,955 INFO L124 PetriNetUnfolderBase]: 2443/4931 cut-off events. [2024-06-27 19:17:59,956 INFO L125 PetriNetUnfolderBase]: For 78933/79164 co-relation queries the response was YES. [2024-06-27 19:17:59,982 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. [2024-06-27 19:18:00,000 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 94 selfloop transitions, 31 changer transitions 0/205 dead transitions. [2024-06-27 19:18:00,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 205 transitions, 2165 flow [2024-06-27 19:18:00,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-06-27 19:18:00,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313432835820896 [2024-06-27 19:18:00,002 INFO L175 Difference]: Start difference. First operand has 139 places, 174 transitions, 1644 flow. Second operand 5 states and 245 transitions. [2024-06-27 19:18:00,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 205 transitions, 2165 flow [2024-06-27 19:18:00,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 205 transitions, 2105 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:00,103 INFO L231 Difference]: Finished difference. Result has 142 places, 180 transitions, 1746 flow [2024-06-27 19:18:00,103 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} [2024-06-27 19:18:00,103 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 82 predicate places. [2024-06-27 19:18:00,103 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 180 transitions, 1746 flow [2024-06-27 19:18:00,103 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) [2024-06-27 19:18:00,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:00,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:00,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:18:00,104 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)] === [2024-06-27 19:18:00,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1660541263, now seen corresponding path program 1 times [2024-06-27 19:18:00,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:00,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306985046] [2024-06-27 19:18:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:00,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:00,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:00,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306985046] [2024-06-27 19:18:00,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306985046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:00,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:00,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:00,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370389978] [2024-06-27 19:18:00,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:00,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:18:00,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:00,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:18:00,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:18:00,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2024-06-27 19:18:00,150 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) [2024-06-27 19:18:00,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:00,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2024-06-27 19:18:00,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:00,646 INFO L124 PetriNetUnfolderBase]: 2683/5433 cut-off events. [2024-06-27 19:18:00,647 INFO L125 PetriNetUnfolderBase]: For 50075/50553 co-relation queries the response was YES. [2024-06-27 19:18:00,674 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. [2024-06-27 19:18:00,692 INFO L140 encePairwiseOnDemand]: 53/67 looper letters, 144 selfloop transitions, 36 changer transitions 0/240 dead transitions. [2024-06-27 19:18:00,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 240 transitions, 2642 flow [2024-06-27 19:18:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-06-27 19:18:00,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6955223880597015 [2024-06-27 19:18:00,693 INFO L175 Difference]: Start difference. First operand has 142 places, 180 transitions, 1746 flow. Second operand 5 states and 233 transitions. [2024-06-27 19:18:00,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 240 transitions, 2642 flow [2024-06-27 19:18:00,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 240 transitions, 2563 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:00,774 INFO L231 Difference]: Finished difference. Result has 148 places, 193 transitions, 2014 flow [2024-06-27 19:18:00,774 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} [2024-06-27 19:18:00,775 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 88 predicate places. [2024-06-27 19:18:00,775 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 193 transitions, 2014 flow [2024-06-27 19:18:00,775 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) [2024-06-27 19:18:00,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:00,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:00,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:18:00,775 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)] === [2024-06-27 19:18:00,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1360401259, now seen corresponding path program 1 times [2024-06-27 19:18:00,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:00,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216303750] [2024-06-27 19:18:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:00,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:00,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:00,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216303750] [2024-06-27 19:18:00,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216303750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:00,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:00,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:00,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67553312] [2024-06-27 19:18:00,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:00,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:00,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:00,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:00,845 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) [2024-06-27 19:18:00,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:00,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:00,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:01,397 INFO L124 PetriNetUnfolderBase]: 2625/5358 cut-off events. [2024-06-27 19:18:01,397 INFO L125 PetriNetUnfolderBase]: For 98654/98886 co-relation queries the response was YES. [2024-06-27 19:18:01,425 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. [2024-06-27 19:18:01,445 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 101 selfloop transitions, 26 changer transitions 0/215 dead transitions. [2024-06-27 19:18:01,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 215 transitions, 2440 flow [2024-06-27 19:18:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 240 transitions. [2024-06-27 19:18:01,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7164179104477612 [2024-06-27 19:18:01,446 INFO L175 Difference]: Start difference. First operand has 148 places, 193 transitions, 2014 flow. Second operand 5 states and 240 transitions. [2024-06-27 19:18:01,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 215 transitions, 2440 flow [2024-06-27 19:18:01,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 215 transitions, 2428 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:01,525 INFO L231 Difference]: Finished difference. Result has 153 places, 194 transitions, 2080 flow [2024-06-27 19:18:01,525 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} [2024-06-27 19:18:01,526 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 93 predicate places. [2024-06-27 19:18:01,526 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 194 transitions, 2080 flow [2024-06-27 19:18:01,526 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) [2024-06-27 19:18:01,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:01,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:01,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:18:01,527 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)] === [2024-06-27 19:18:01,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash 625344171, now seen corresponding path program 2 times [2024-06-27 19:18:01,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:01,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771180013] [2024-06-27 19:18:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:01,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:01,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:01,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771180013] [2024-06-27 19:18:01,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771180013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:01,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:01,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:01,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808107427] [2024-06-27 19:18:01,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:01,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:01,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:01,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:01,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:01,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:01,591 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) [2024-06-27 19:18:01,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:01,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:01,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:02,163 INFO L124 PetriNetUnfolderBase]: 2625/5358 cut-off events. [2024-06-27 19:18:02,163 INFO L125 PetriNetUnfolderBase]: For 108831/109097 co-relation queries the response was YES. [2024-06-27 19:18:02,188 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. [2024-06-27 19:18:02,205 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 102 selfloop transitions, 28 changer transitions 0/218 dead transitions. [2024-06-27 19:18:02,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 218 transitions, 2554 flow [2024-06-27 19:18:02,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:02,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 241 transitions. [2024-06-27 19:18:02,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7194029850746269 [2024-06-27 19:18:02,206 INFO L175 Difference]: Start difference. First operand has 153 places, 194 transitions, 2080 flow. Second operand 5 states and 241 transitions. [2024-06-27 19:18:02,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 218 transitions, 2554 flow [2024-06-27 19:18:02,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 218 transitions, 2515 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:02,305 INFO L231 Difference]: Finished difference. Result has 156 places, 197 transitions, 2162 flow [2024-06-27 19:18:02,305 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} [2024-06-27 19:18:02,306 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 96 predicate places. [2024-06-27 19:18:02,306 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 197 transitions, 2162 flow [2024-06-27 19:18:02,306 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) [2024-06-27 19:18:02,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:02,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:02,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:18:02,307 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)] === [2024-06-27 19:18:02,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:02,307 INFO L85 PathProgramCache]: Analyzing trace with hash -42560779, now seen corresponding path program 3 times [2024-06-27 19:18:02,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:02,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779014902] [2024-06-27 19:18:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:02,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:02,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:02,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779014902] [2024-06-27 19:18:02,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779014902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:02,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:02,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114066424] [2024-06-27 19:18:02,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:02,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:02,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:02,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:02,397 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) [2024-06-27 19:18:02,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:02,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:02,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:03,036 INFO L124 PetriNetUnfolderBase]: 2668/5440 cut-off events. [2024-06-27 19:18:03,036 INFO L125 PetriNetUnfolderBase]: For 117790/118053 co-relation queries the response was YES. [2024-06-27 19:18:03,064 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. [2024-06-27 19:18:03,087 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 122 selfloop transitions, 17 changer transitions 0/227 dead transitions. [2024-06-27 19:18:03,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 227 transitions, 2711 flow [2024-06-27 19:18:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2024-06-27 19:18:03,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7253731343283583 [2024-06-27 19:18:03,088 INFO L175 Difference]: Start difference. First operand has 156 places, 197 transitions, 2162 flow. Second operand 5 states and 243 transitions. [2024-06-27 19:18:03,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 227 transitions, 2711 flow [2024-06-27 19:18:03,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 2666 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:03,199 INFO L231 Difference]: Finished difference. Result has 159 places, 197 transitions, 2157 flow [2024-06-27 19:18:03,199 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} [2024-06-27 19:18:03,199 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 99 predicate places. [2024-06-27 19:18:03,199 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 197 transitions, 2157 flow [2024-06-27 19:18:03,200 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) [2024-06-27 19:18:03,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:03,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:03,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:18:03,200 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)] === [2024-06-27 19:18:03,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash 943930141, now seen corresponding path program 1 times [2024-06-27 19:18:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:03,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138247926] [2024-06-27 19:18:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:03,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:03,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:03,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138247926] [2024-06-27 19:18:03,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138247926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:03,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:03,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:03,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974265909] [2024-06-27 19:18:03,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:03,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:03,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:03,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:03,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:03,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:03,286 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) [2024-06-27 19:18:03,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:03,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:03,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:03,970 INFO L124 PetriNetUnfolderBase]: 2708/5574 cut-off events. [2024-06-27 19:18:03,970 INFO L125 PetriNetUnfolderBase]: For 134224/134484 co-relation queries the response was YES. [2024-06-27 19:18:04,006 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. [2024-06-27 19:18:04,031 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 123 selfloop transitions, 14 changer transitions 2/227 dead transitions. [2024-06-27 19:18:04,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 227 transitions, 2679 flow [2024-06-27 19:18:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 241 transitions. [2024-06-27 19:18:04,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7194029850746269 [2024-06-27 19:18:04,033 INFO L175 Difference]: Start difference. First operand has 159 places, 197 transitions, 2157 flow. Second operand 5 states and 241 transitions. [2024-06-27 19:18:04,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 227 transitions, 2679 flow [2024-06-27 19:18:04,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 227 transitions, 2564 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:04,175 INFO L231 Difference]: Finished difference. Result has 159 places, 199 transitions, 2120 flow [2024-06-27 19:18:04,175 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} [2024-06-27 19:18:04,175 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 99 predicate places. [2024-06-27 19:18:04,175 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 199 transitions, 2120 flow [2024-06-27 19:18:04,176 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) [2024-06-27 19:18:04,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:04,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:04,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:18:04,176 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)] === [2024-06-27 19:18:04,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:04,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1686735416, now seen corresponding path program 1 times [2024-06-27 19:18:04,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:04,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221098043] [2024-06-27 19:18:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:04,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:04,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:04,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221098043] [2024-06-27 19:18:04,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221098043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:04,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:04,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:04,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931163309] [2024-06-27 19:18:04,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:04,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:04,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:04,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:04,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:04,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:04,276 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) [2024-06-27 19:18:04,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:04,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:04,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:04,954 INFO L124 PetriNetUnfolderBase]: 2772/5709 cut-off events. [2024-06-27 19:18:04,954 INFO L125 PetriNetUnfolderBase]: For 145280/145553 co-relation queries the response was YES. [2024-06-27 19:18:04,983 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. [2024-06-27 19:18:05,003 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 112 selfloop transitions, 25 changer transitions 1/226 dead transitions. [2024-06-27 19:18:05,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 226 transitions, 2652 flow [2024-06-27 19:18:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:05,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2024-06-27 19:18:05,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7044776119402985 [2024-06-27 19:18:05,005 INFO L175 Difference]: Start difference. First operand has 159 places, 199 transitions, 2120 flow. Second operand 5 states and 236 transitions. [2024-06-27 19:18:05,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 226 transitions, 2652 flow [2024-06-27 19:18:05,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 226 transitions, 2639 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:18:05,134 INFO L231 Difference]: Finished difference. Result has 165 places, 205 transitions, 2270 flow [2024-06-27 19:18:05,134 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} [2024-06-27 19:18:05,134 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 105 predicate places. [2024-06-27 19:18:05,134 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 205 transitions, 2270 flow [2024-06-27 19:18:05,135 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) [2024-06-27 19:18:05,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:05,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:05,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:18:05,135 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)] === [2024-06-27 19:18:05,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:05,135 INFO L85 PathProgramCache]: Analyzing trace with hash 589435469, now seen corresponding path program 1 times [2024-06-27 19:18:05,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:05,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630193913] [2024-06-27 19:18:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:05,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:05,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:05,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630193913] [2024-06-27 19:18:05,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630193913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:05,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:05,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753718747] [2024-06-27 19:18:05,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:05,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:05,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:05,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:05,223 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) [2024-06-27 19:18:05,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:05,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:05,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:05,877 INFO L124 PetriNetUnfolderBase]: 2692/5491 cut-off events. [2024-06-27 19:18:05,877 INFO L125 PetriNetUnfolderBase]: For 156105/156400 co-relation queries the response was YES. [2024-06-27 19:18:05,911 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. [2024-06-27 19:18:05,932 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 106 selfloop transitions, 27 changer transitions 0/221 dead transitions. [2024-06-27 19:18:05,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 221 transitions, 2652 flow [2024-06-27 19:18:05,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-06-27 19:18:05,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925373134328359 [2024-06-27 19:18:05,933 INFO L175 Difference]: Start difference. First operand has 165 places, 205 transitions, 2270 flow. Second operand 5 states and 232 transitions. [2024-06-27 19:18:05,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 221 transitions, 2652 flow [2024-06-27 19:18:06,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 221 transitions, 2630 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 19:18:06,109 INFO L231 Difference]: Finished difference. Result has 169 places, 207 transitions, 2330 flow [2024-06-27 19:18:06,109 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} [2024-06-27 19:18:06,110 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 109 predicate places. [2024-06-27 19:18:06,110 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 207 transitions, 2330 flow [2024-06-27 19:18:06,110 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) [2024-06-27 19:18:06,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:06,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:06,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:18:06,111 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)] === [2024-06-27 19:18:06,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2067137233, now seen corresponding path program 2 times [2024-06-27 19:18:06,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:06,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123134136] [2024-06-27 19:18:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:06,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:06,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:06,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123134136] [2024-06-27 19:18:06,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123134136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:06,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:06,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:06,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834743366] [2024-06-27 19:18:06,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:06,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:06,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:06,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:06,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:06,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:06,204 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) [2024-06-27 19:18:06,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:06,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:06,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:06,840 INFO L124 PetriNetUnfolderBase]: 2759/5661 cut-off events. [2024-06-27 19:18:06,840 INFO L125 PetriNetUnfolderBase]: For 167003/167290 co-relation queries the response was YES. [2024-06-27 19:18:06,875 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. [2024-06-27 19:18:06,898 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 128 selfloop transitions, 24 changer transitions 0/240 dead transitions. [2024-06-27 19:18:06,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 240 transitions, 3023 flow [2024-06-27 19:18:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:06,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:06,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2024-06-27 19:18:06,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6985074626865672 [2024-06-27 19:18:06,899 INFO L175 Difference]: Start difference. First operand has 169 places, 207 transitions, 2330 flow. Second operand 5 states and 234 transitions. [2024-06-27 19:18:06,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 240 transitions, 3023 flow [2024-06-27 19:18:07,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 240 transitions, 2985 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:07,059 INFO L231 Difference]: Finished difference. Result has 172 places, 213 transitions, 2428 flow [2024-06-27 19:18:07,060 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} [2024-06-27 19:18:07,060 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 112 predicate places. [2024-06-27 19:18:07,060 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 213 transitions, 2428 flow [2024-06-27 19:18:07,060 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) [2024-06-27 19:18:07,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:07,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:07,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:18:07,061 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)] === [2024-06-27 19:18:07,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:07,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2067406003, now seen corresponding path program 3 times [2024-06-27 19:18:07,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:07,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463383379] [2024-06-27 19:18:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:07,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:07,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:07,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463383379] [2024-06-27 19:18:07,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463383379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:07,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:07,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:07,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920617718] [2024-06-27 19:18:07,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:07,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:07,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:07,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:07,154 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) [2024-06-27 19:18:07,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:07,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:07,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:07,832 INFO L124 PetriNetUnfolderBase]: 2741/5634 cut-off events. [2024-06-27 19:18:07,832 INFO L125 PetriNetUnfolderBase]: For 178633/178928 co-relation queries the response was YES. [2024-06-27 19:18:07,871 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. [2024-06-27 19:18:07,894 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 132 selfloop transitions, 28 changer transitions 0/248 dead transitions. [2024-06-27 19:18:07,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 248 transitions, 3128 flow [2024-06-27 19:18:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 242 transitions. [2024-06-27 19:18:07,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7223880597014926 [2024-06-27 19:18:07,895 INFO L175 Difference]: Start difference. First operand has 172 places, 213 transitions, 2428 flow. Second operand 5 states and 242 transitions. [2024-06-27 19:18:07,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 248 transitions, 3128 flow [2024-06-27 19:18:08,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 248 transitions, 3108 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:08,091 INFO L231 Difference]: Finished difference. Result has 177 places, 215 transitions, 2495 flow [2024-06-27 19:18:08,091 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} [2024-06-27 19:18:08,091 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 117 predicate places. [2024-06-27 19:18:08,091 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 215 transitions, 2495 flow [2024-06-27 19:18:08,092 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) [2024-06-27 19:18:08,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:08,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:08,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:18:08,092 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)] === [2024-06-27 19:18:08,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:08,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1659050563, now seen corresponding path program 1 times [2024-06-27 19:18:08,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:08,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766187335] [2024-06-27 19:18:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:08,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:08,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:08,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766187335] [2024-06-27 19:18:08,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766187335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:08,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:08,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:08,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996394136] [2024-06-27 19:18:08,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:08,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:18:08,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:18:08,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:18:08,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 67 [2024-06-27 19:18:08,135 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) [2024-06-27 19:18:08,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:08,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 67 [2024-06-27 19:18:08,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:08,727 INFO L124 PetriNetUnfolderBase]: 2519/5283 cut-off events. [2024-06-27 19:18:08,727 INFO L125 PetriNetUnfolderBase]: For 96355/96894 co-relation queries the response was YES. [2024-06-27 19:18:08,759 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. [2024-06-27 19:18:08,776 INFO L140 encePairwiseOnDemand]: 50/67 looper letters, 147 selfloop transitions, 58 changer transitions 0/272 dead transitions. [2024-06-27 19:18:08,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 272 transitions, 3338 flow [2024-06-27 19:18:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 241 transitions. [2024-06-27 19:18:08,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7194029850746269 [2024-06-27 19:18:08,777 INFO L175 Difference]: Start difference. First operand has 177 places, 215 transitions, 2495 flow. Second operand 5 states and 241 transitions. [2024-06-27 19:18:08,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 272 transitions, 3338 flow [2024-06-27 19:18:08,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 272 transitions, 3298 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:08,924 INFO L231 Difference]: Finished difference. Result has 182 places, 244 transitions, 3038 flow [2024-06-27 19:18:08,925 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} [2024-06-27 19:18:08,925 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 122 predicate places. [2024-06-27 19:18:08,925 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 244 transitions, 3038 flow [2024-06-27 19:18:08,925 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) [2024-06-27 19:18:08,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:08,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:08,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:18:08,925 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)] === [2024-06-27 19:18:08,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:08,926 INFO L85 PathProgramCache]: Analyzing trace with hash -494803903, now seen corresponding path program 1 times [2024-06-27 19:18:08,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:08,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244555805] [2024-06-27 19:18:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:08,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:08,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:08,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244555805] [2024-06-27 19:18:08,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244555805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:08,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:08,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:08,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734124242] [2024-06-27 19:18:08,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:08,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:08,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:08,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:09,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:09,012 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) [2024-06-27 19:18:09,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:09,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:09,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:09,692 INFO L124 PetriNetUnfolderBase]: 2670/5506 cut-off events. [2024-06-27 19:18:09,692 INFO L125 PetriNetUnfolderBase]: For 196544/196847 co-relation queries the response was YES. [2024-06-27 19:18:09,728 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. [2024-06-27 19:18:09,834 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 129 selfloop transitions, 28 changer transitions 0/269 dead transitions. [2024-06-27 19:18:09,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 269 transitions, 3678 flow [2024-06-27 19:18:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2024-06-27 19:18:09,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134328358208956 [2024-06-27 19:18:09,835 INFO L175 Difference]: Start difference. First operand has 182 places, 244 transitions, 3038 flow. Second operand 5 states and 239 transitions. [2024-06-27 19:18:09,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 269 transitions, 3678 flow [2024-06-27 19:18:10,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 269 transitions, 3606 flow, removed 36 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:10,011 INFO L231 Difference]: Finished difference. Result has 187 places, 248 transitions, 3097 flow [2024-06-27 19:18:10,011 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} [2024-06-27 19:18:10,011 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 127 predicate places. [2024-06-27 19:18:10,011 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 248 transitions, 3097 flow [2024-06-27 19:18:10,012 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) [2024-06-27 19:18:10,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:10,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:10,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:18:10,012 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)] === [2024-06-27 19:18:10,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:10,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1993474179, now seen corresponding path program 2 times [2024-06-27 19:18:10,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:10,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704522082] [2024-06-27 19:18:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:10,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:10,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:10,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704522082] [2024-06-27 19:18:10,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704522082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:10,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:10,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:10,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927523598] [2024-06-27 19:18:10,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:10,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:10,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:10,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:10,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:10,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:10,107 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) [2024-06-27 19:18:10,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:10,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:10,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:10,824 INFO L124 PetriNetUnfolderBase]: 2668/5550 cut-off events. [2024-06-27 19:18:10,825 INFO L125 PetriNetUnfolderBase]: For 212061/212363 co-relation queries the response was YES. [2024-06-27 19:18:10,865 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. [2024-06-27 19:18:10,887 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 127 selfloop transitions, 41 changer transitions 0/280 dead transitions. [2024-06-27 19:18:10,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 280 transitions, 3817 flow [2024-06-27 19:18:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-06-27 19:18:10,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313432835820896 [2024-06-27 19:18:10,888 INFO L175 Difference]: Start difference. First operand has 187 places, 248 transitions, 3097 flow. Second operand 5 states and 245 transitions. [2024-06-27 19:18:10,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 280 transitions, 3817 flow [2024-06-27 19:18:11,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 280 transitions, 3745 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:11,140 INFO L231 Difference]: Finished difference. Result has 191 places, 254 transitions, 3264 flow [2024-06-27 19:18:11,140 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} [2024-06-27 19:18:11,140 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 131 predicate places. [2024-06-27 19:18:11,141 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 254 transitions, 3264 flow [2024-06-27 19:18:11,141 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) [2024-06-27 19:18:11,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:11,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:11,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:18:11,141 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)] === [2024-06-27 19:18:11,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2018469789, now seen corresponding path program 3 times [2024-06-27 19:18:11,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:11,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792700680] [2024-06-27 19:18:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:11,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:11,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:11,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792700680] [2024-06-27 19:18:11,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792700680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:11,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:11,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:11,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179565211] [2024-06-27 19:18:11,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:11,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:18:11,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:11,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:18:11,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:18:11,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2024-06-27 19:18:11,184 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) [2024-06-27 19:18:11,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:11,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2024-06-27 19:18:11,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:12,044 INFO L124 PetriNetUnfolderBase]: 2851/5741 cut-off events. [2024-06-27 19:18:12,044 INFO L125 PetriNetUnfolderBase]: For 130856/131514 co-relation queries the response was YES. [2024-06-27 19:18:12,089 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. [2024-06-27 19:18:12,113 INFO L140 encePairwiseOnDemand]: 53/67 looper letters, 113 selfloop transitions, 26 changer transitions 1/298 dead transitions. [2024-06-27 19:18:12,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 298 transitions, 3867 flow [2024-06-27 19:18:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2024-06-27 19:18:12,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776119402985075 [2024-06-27 19:18:12,114 INFO L175 Difference]: Start difference. First operand has 191 places, 254 transitions, 3264 flow. Second operand 5 states and 227 transitions. [2024-06-27 19:18:12,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 298 transitions, 3867 flow [2024-06-27 19:18:12,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 298 transitions, 3756 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:12,366 INFO L231 Difference]: Finished difference. Result has 196 places, 258 transitions, 3292 flow [2024-06-27 19:18:12,366 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} [2024-06-27 19:18:12,367 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 136 predicate places. [2024-06-27 19:18:12,367 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 258 transitions, 3292 flow [2024-06-27 19:18:12,367 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) [2024-06-27 19:18:12,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:12,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:12,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:18:12,368 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)] === [2024-06-27 19:18:12,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:12,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2040981205, now seen corresponding path program 1 times [2024-06-27 19:18:12,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:12,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622299658] [2024-06-27 19:18:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:12,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:12,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:12,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622299658] [2024-06-27 19:18:12,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622299658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:12,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:12,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:12,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859730925] [2024-06-27 19:18:12,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:12,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:12,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:12,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:12,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:12,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:12,471 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) [2024-06-27 19:18:12,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:12,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:12,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:13,364 INFO L124 PetriNetUnfolderBase]: 2648/5613 cut-off events. [2024-06-27 19:18:13,364 INFO L125 PetriNetUnfolderBase]: For 220673/220975 co-relation queries the response was YES. [2024-06-27 19:18:13,402 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. [2024-06-27 19:18:13,423 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 115 selfloop transitions, 49 changer transitions 0/281 dead transitions. [2024-06-27 19:18:13,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 281 transitions, 3917 flow [2024-06-27 19:18:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 240 transitions. [2024-06-27 19:18:13,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7164179104477612 [2024-06-27 19:18:13,431 INFO L175 Difference]: Start difference. First operand has 196 places, 258 transitions, 3292 flow. Second operand 5 states and 240 transitions. [2024-06-27 19:18:13,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 281 transitions, 3917 flow [2024-06-27 19:18:13,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 281 transitions, 3913 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:13,705 INFO L231 Difference]: Finished difference. Result has 201 places, 262 transitions, 3469 flow [2024-06-27 19:18:13,705 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} [2024-06-27 19:18:13,705 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 141 predicate places. [2024-06-27 19:18:13,705 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 262 transitions, 3469 flow [2024-06-27 19:18:13,706 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) [2024-06-27 19:18:13,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:13,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:13,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:18:13,706 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)] === [2024-06-27 19:18:13,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:13,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1249270819, now seen corresponding path program 2 times [2024-06-27 19:18:13,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:13,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833671100] [2024-06-27 19:18:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:13,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:13,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:13,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833671100] [2024-06-27 19:18:13,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833671100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:13,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:13,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780201567] [2024-06-27 19:18:13,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:13,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:13,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:13,795 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) [2024-06-27 19:18:13,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:13,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:13,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:14,627 INFO L124 PetriNetUnfolderBase]: 2601/5528 cut-off events. [2024-06-27 19:18:14,627 INFO L125 PetriNetUnfolderBase]: For 233858/234097 co-relation queries the response was YES. [2024-06-27 19:18:14,660 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. [2024-06-27 19:18:14,680 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 150 selfloop transitions, 24 changer transitions 0/291 dead transitions. [2024-06-27 19:18:14,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 291 transitions, 4209 flow [2024-06-27 19:18:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 241 transitions. [2024-06-27 19:18:14,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7194029850746269 [2024-06-27 19:18:14,682 INFO L175 Difference]: Start difference. First operand has 201 places, 262 transitions, 3469 flow. Second operand 5 states and 241 transitions. [2024-06-27 19:18:14,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 291 transitions, 4209 flow [2024-06-27 19:18:14,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 291 transitions, 4123 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:14,956 INFO L231 Difference]: Finished difference. Result has 204 places, 266 transitions, 3530 flow [2024-06-27 19:18:14,956 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} [2024-06-27 19:18:14,956 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 144 predicate places. [2024-06-27 19:18:14,956 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 266 transitions, 3530 flow [2024-06-27 19:18:14,957 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) [2024-06-27 19:18:14,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:14,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:14,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:18:14,957 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)] === [2024-06-27 19:18:14,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:14,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1992673821, now seen corresponding path program 1 times [2024-06-27 19:18:14,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:14,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433600768] [2024-06-27 19:18:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:14,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:14,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:14,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433600768] [2024-06-27 19:18:14,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433600768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:14,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:14,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:14,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447082991] [2024-06-27 19:18:14,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:14,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:14,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:15,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:15,035 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) [2024-06-27 19:18:15,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:15,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:15,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:15,818 INFO L124 PetriNetUnfolderBase]: 2619/5546 cut-off events. [2024-06-27 19:18:15,818 INFO L125 PetriNetUnfolderBase]: For 246333/246620 co-relation queries the response was YES. [2024-06-27 19:18:15,858 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. [2024-06-27 19:18:15,880 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 114 selfloop transitions, 58 changer transitions 0/289 dead transitions. [2024-06-27 19:18:15,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 289 transitions, 4191 flow [2024-06-27 19:18:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 240 transitions. [2024-06-27 19:18:15,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7164179104477612 [2024-06-27 19:18:15,881 INFO L175 Difference]: Start difference. First operand has 204 places, 266 transitions, 3530 flow. Second operand 5 states and 240 transitions. [2024-06-27 19:18:15,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 289 transitions, 4191 flow [2024-06-27 19:18:16,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 289 transitions, 4098 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:16,247 INFO L231 Difference]: Finished difference. Result has 206 places, 270 transitions, 3649 flow [2024-06-27 19:18:16,247 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} [2024-06-27 19:18:16,247 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 146 predicate places. [2024-06-27 19:18:16,248 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 270 transitions, 3649 flow [2024-06-27 19:18:16,248 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) [2024-06-27 19:18:16,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:16,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:16,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:18:16,248 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)] === [2024-06-27 19:18:16,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2017603897, now seen corresponding path program 2 times [2024-06-27 19:18:16,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:16,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771705060] [2024-06-27 19:18:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:16,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:16,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771705060] [2024-06-27 19:18:16,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771705060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:16,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:16,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:16,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354684238] [2024-06-27 19:18:16,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:16,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:16,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:16,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:16,340 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) [2024-06-27 19:18:16,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:16,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:16,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:17,075 INFO L124 PetriNetUnfolderBase]: 2524/5374 cut-off events. [2024-06-27 19:18:17,075 INFO L125 PetriNetUnfolderBase]: For 254747/254995 co-relation queries the response was YES. [2024-06-27 19:18:17,115 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. [2024-06-27 19:18:17,136 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 135 selfloop transitions, 41 changer transitions 0/293 dead transitions. [2024-06-27 19:18:17,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 293 transitions, 4258 flow [2024-06-27 19:18:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:17,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-06-27 19:18:17,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283582089552239 [2024-06-27 19:18:17,138 INFO L175 Difference]: Start difference. First operand has 206 places, 270 transitions, 3649 flow. Second operand 5 states and 244 transitions. [2024-06-27 19:18:17,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 293 transitions, 4258 flow [2024-06-27 19:18:17,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 293 transitions, 4160 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:17,573 INFO L231 Difference]: Finished difference. Result has 209 places, 271 transitions, 3655 flow [2024-06-27 19:18:17,573 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} [2024-06-27 19:18:17,574 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 149 predicate places. [2024-06-27 19:18:17,574 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 271 transitions, 3655 flow [2024-06-27 19:18:17,574 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) [2024-06-27 19:18:17,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:17,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:17,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:18:17,574 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)] === [2024-06-27 19:18:17,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1093092355, now seen corresponding path program 2 times [2024-06-27 19:18:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:17,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066135816] [2024-06-27 19:18:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:17,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:17,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066135816] [2024-06-27 19:18:17,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066135816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:17,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:17,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:17,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294341970] [2024-06-27 19:18:17,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:17,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:18:17,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:17,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:18:17,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:18:17,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 67 [2024-06-27 19:18:17,628 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) [2024-06-27 19:18:17,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:17,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 67 [2024-06-27 19:18:17,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:18,185 INFO L124 PetriNetUnfolderBase]: 1928/4154 cut-off events. [2024-06-27 19:18:18,185 INFO L125 PetriNetUnfolderBase]: For 113626/114015 co-relation queries the response was YES. [2024-06-27 19:18:18,215 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. [2024-06-27 19:18:18,229 INFO L140 encePairwiseOnDemand]: 50/67 looper letters, 110 selfloop transitions, 42 changer transitions 1/301 dead transitions. [2024-06-27 19:18:18,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 301 transitions, 4098 flow [2024-06-27 19:18:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2024-06-27 19:18:18,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134328358208956 [2024-06-27 19:18:18,230 INFO L175 Difference]: Start difference. First operand has 209 places, 271 transitions, 3655 flow. Second operand 5 states and 239 transitions. [2024-06-27 19:18:18,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 301 transitions, 4098 flow [2024-06-27 19:18:18,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 301 transitions, 3935 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:18,454 INFO L231 Difference]: Finished difference. Result has 212 places, 267 transitions, 3607 flow [2024-06-27 19:18:18,455 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} [2024-06-27 19:18:18,456 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 152 predicate places. [2024-06-27 19:18:18,456 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 267 transitions, 3607 flow [2024-06-27 19:18:18,456 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) [2024-06-27 19:18:18,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:18,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:18,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:18:18,457 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)] === [2024-06-27 19:18:18,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:18,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1376512887, now seen corresponding path program 3 times [2024-06-27 19:18:18,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:18,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924605357] [2024-06-27 19:18:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:18,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:18,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:18,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924605357] [2024-06-27 19:18:18,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924605357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:18,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:18,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:18,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138417335] [2024-06-27 19:18:18,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:18,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:18:18,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:18,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:18:18,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:18:18,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 67 [2024-06-27 19:18:18,505 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) [2024-06-27 19:18:18,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:18,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 67 [2024-06-27 19:18:18,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:18,926 INFO L124 PetriNetUnfolderBase]: 1317/3047 cut-off events. [2024-06-27 19:18:18,927 INFO L125 PetriNetUnfolderBase]: For 78682/79073 co-relation queries the response was YES. [2024-06-27 19:18:18,946 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. [2024-06-27 19:18:18,955 INFO L140 encePairwiseOnDemand]: 53/67 looper letters, 103 selfloop transitions, 49 changer transitions 1/274 dead transitions. [2024-06-27 19:18:18,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 274 transitions, 3807 flow [2024-06-27 19:18:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-06-27 19:18:18,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6955223880597015 [2024-06-27 19:18:18,956 INFO L175 Difference]: Start difference. First operand has 212 places, 267 transitions, 3607 flow. Second operand 5 states and 233 transitions. [2024-06-27 19:18:18,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 274 transitions, 3807 flow [2024-06-27 19:18:19,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 274 transitions, 3573 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:19,133 INFO L231 Difference]: Finished difference. Result has 213 places, 254 transitions, 3310 flow [2024-06-27 19:18:19,133 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} [2024-06-27 19:18:19,133 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 153 predicate places. [2024-06-27 19:18:19,134 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 254 transitions, 3310 flow [2024-06-27 19:18:19,134 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) [2024-06-27 19:18:19,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:19,134 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] [2024-06-27 19:18:19,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:18:19,134 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)] === [2024-06-27 19:18:19,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:19,134 INFO L85 PathProgramCache]: Analyzing trace with hash 334742190, now seen corresponding path program 1 times [2024-06-27 19:18:19,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:19,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560766382] [2024-06-27 19:18:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:19,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:19,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:19,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560766382] [2024-06-27 19:18:19,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560766382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:19,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:19,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:19,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688968399] [2024-06-27 19:18:19,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:19,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:19,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:19,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:19,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:19,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:19,199 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) [2024-06-27 19:18:19,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:19,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:19,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:19,622 INFO L124 PetriNetUnfolderBase]: 1360/3242 cut-off events. [2024-06-27 19:18:19,622 INFO L125 PetriNetUnfolderBase]: For 136454/136663 co-relation queries the response was YES. [2024-06-27 19:18:19,646 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. [2024-06-27 19:18:19,658 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 129 selfloop transitions, 25 changer transitions 2/274 dead transitions. [2024-06-27 19:18:19,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 274 transitions, 3860 flow [2024-06-27 19:18:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-06-27 19:18:19,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6955223880597015 [2024-06-27 19:18:19,660 INFO L175 Difference]: Start difference. First operand has 213 places, 254 transitions, 3310 flow. Second operand 5 states and 233 transitions. [2024-06-27 19:18:19,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 274 transitions, 3860 flow [2024-06-27 19:18:19,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 274 transitions, 3772 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:19,861 INFO L231 Difference]: Finished difference. Result has 217 places, 256 transitions, 3323 flow [2024-06-27 19:18:19,861 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} [2024-06-27 19:18:19,862 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 157 predicate places. [2024-06-27 19:18:19,862 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 256 transitions, 3323 flow [2024-06-27 19:18:19,862 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) [2024-06-27 19:18:19,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:19,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:19,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:18:19,862 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)] === [2024-06-27 19:18:19,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:19,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1159907387, now seen corresponding path program 1 times [2024-06-27 19:18:19,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:19,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937961927] [2024-06-27 19:18:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:19,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:19,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937961927] [2024-06-27 19:18:19,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937961927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:19,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:19,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:19,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173946837] [2024-06-27 19:18:19,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:19,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:19,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:19,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:19,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:19,961 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) [2024-06-27 19:18:19,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:19,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:19,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:20,408 INFO L124 PetriNetUnfolderBase]: 1333/3164 cut-off events. [2024-06-27 19:18:20,408 INFO L125 PetriNetUnfolderBase]: For 135378/135584 co-relation queries the response was YES. [2024-06-27 19:18:20,431 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. [2024-06-27 19:18:20,442 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 127 selfloop transitions, 30 changer transitions 2/277 dead transitions. [2024-06-27 19:18:20,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 277 transitions, 3908 flow [2024-06-27 19:18:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 237 transitions. [2024-06-27 19:18:20,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074626865671642 [2024-06-27 19:18:20,443 INFO L175 Difference]: Start difference. First operand has 217 places, 256 transitions, 3323 flow. Second operand 5 states and 237 transitions. [2024-06-27 19:18:20,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 277 transitions, 3908 flow [2024-06-27 19:18:20,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 277 transitions, 3767 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:20,646 INFO L231 Difference]: Finished difference. Result has 216 places, 257 transitions, 3274 flow [2024-06-27 19:18:20,646 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} [2024-06-27 19:18:20,647 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 156 predicate places. [2024-06-27 19:18:20,647 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 257 transitions, 3274 flow [2024-06-27 19:18:20,647 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) [2024-06-27 19:18:20,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:20,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:20,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:18:20,648 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)] === [2024-06-27 19:18:20,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1494060913, now seen corresponding path program 2 times [2024-06-27 19:18:20,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:20,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267887323] [2024-06-27 19:18:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:20,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:20,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:20,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267887323] [2024-06-27 19:18:20,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267887323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:20,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:20,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:20,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131472280] [2024-06-27 19:18:20,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:20,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:20,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:20,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:20,712 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) [2024-06-27 19:18:20,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:20,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:20,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:21,152 INFO L124 PetriNetUnfolderBase]: 1358/3220 cut-off events. [2024-06-27 19:18:21,152 INFO L125 PetriNetUnfolderBase]: For 132604/132824 co-relation queries the response was YES. [2024-06-27 19:18:21,176 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. [2024-06-27 19:18:21,188 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 131 selfloop transitions, 28 changer transitions 2/279 dead transitions. [2024-06-27 19:18:21,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 279 transitions, 3868 flow [2024-06-27 19:18:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 238 transitions. [2024-06-27 19:18:21,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7104477611940299 [2024-06-27 19:18:21,189 INFO L175 Difference]: Start difference. First operand has 216 places, 257 transitions, 3274 flow. Second operand 5 states and 238 transitions. [2024-06-27 19:18:21,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 279 transitions, 3868 flow [2024-06-27 19:18:21,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 279 transitions, 3789 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:21,420 INFO L231 Difference]: Finished difference. Result has 218 places, 257 transitions, 3263 flow [2024-06-27 19:18:21,420 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} [2024-06-27 19:18:21,421 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 158 predicate places. [2024-06-27 19:18:21,421 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 257 transitions, 3263 flow [2024-06-27 19:18:21,421 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) [2024-06-27 19:18:21,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:21,422 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] [2024-06-27 19:18:21,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:18:21,422 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)] === [2024-06-27 19:18:21,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:21,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2057725197, now seen corresponding path program 1 times [2024-06-27 19:18:21,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:21,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496629036] [2024-06-27 19:18:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:21,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:21,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:21,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496629036] [2024-06-27 19:18:21,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496629036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:21,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:21,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:21,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676181432] [2024-06-27 19:18:21,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:21,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:21,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:21,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:21,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:21,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:21,507 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) [2024-06-27 19:18:21,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:21,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:21,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:21,962 INFO L124 PetriNetUnfolderBase]: 1338/3139 cut-off events. [2024-06-27 19:18:21,962 INFO L125 PetriNetUnfolderBase]: For 133222/133451 co-relation queries the response was YES. [2024-06-27 19:18:21,989 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. [2024-06-27 19:18:22,001 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 129 selfloop transitions, 24 changer transitions 0/271 dead transitions. [2024-06-27 19:18:22,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 271 transitions, 3697 flow [2024-06-27 19:18:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2024-06-27 19:18:22,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865671641791045 [2024-06-27 19:18:22,002 INFO L175 Difference]: Start difference. First operand has 218 places, 257 transitions, 3263 flow. Second operand 5 states and 230 transitions. [2024-06-27 19:18:22,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 271 transitions, 3697 flow [2024-06-27 19:18:22,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 271 transitions, 3579 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:22,246 INFO L231 Difference]: Finished difference. Result has 216 places, 258 transitions, 3214 flow [2024-06-27 19:18:22,246 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} [2024-06-27 19:18:22,246 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 156 predicate places. [2024-06-27 19:18:22,246 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 258 transitions, 3214 flow [2024-06-27 19:18:22,247 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) [2024-06-27 19:18:22,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:22,247 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] [2024-06-27 19:18:22,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:18:22,247 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)] === [2024-06-27 19:18:22,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash -435163537, now seen corresponding path program 2 times [2024-06-27 19:18:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:22,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255427772] [2024-06-27 19:18:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:22,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:22,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255427772] [2024-06-27 19:18:22,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255427772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:22,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:22,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:22,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970601869] [2024-06-27 19:18:22,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:22,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:22,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:22,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:22,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:22,328 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) [2024-06-27 19:18:22,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:22,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:22,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:22,767 INFO L124 PetriNetUnfolderBase]: 1384/3254 cut-off events. [2024-06-27 19:18:22,767 INFO L125 PetriNetUnfolderBase]: For 128886/129121 co-relation queries the response was YES. [2024-06-27 19:18:22,791 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. [2024-06-27 19:18:22,802 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 142 selfloop transitions, 15 changer transitions 1/276 dead transitions. [2024-06-27 19:18:22,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 276 transitions, 3777 flow [2024-06-27 19:18:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-06-27 19:18:22,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6895522388059702 [2024-06-27 19:18:22,803 INFO L175 Difference]: Start difference. First operand has 216 places, 258 transitions, 3214 flow. Second operand 5 states and 231 transitions. [2024-06-27 19:18:22,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 276 transitions, 3777 flow [2024-06-27 19:18:23,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 276 transitions, 3746 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:23,041 INFO L231 Difference]: Finished difference. Result has 219 places, 259 transitions, 3233 flow [2024-06-27 19:18:23,041 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} [2024-06-27 19:18:23,042 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 159 predicate places. [2024-06-27 19:18:23,042 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 259 transitions, 3233 flow [2024-06-27 19:18:23,042 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) [2024-06-27 19:18:23,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:23,042 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] [2024-06-27 19:18:23,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:18:23,042 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)] === [2024-06-27 19:18:23,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:23,043 INFO L85 PathProgramCache]: Analyzing trace with hash -435223987, now seen corresponding path program 3 times [2024-06-27 19:18:23,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:23,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308492442] [2024-06-27 19:18:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:23,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:23,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:23,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308492442] [2024-06-27 19:18:23,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308492442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:23,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:23,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:23,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787509447] [2024-06-27 19:18:23,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:23,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:23,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:23,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:23,106 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) [2024-06-27 19:18:23,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:23,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:23,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:23,570 INFO L124 PetriNetUnfolderBase]: 1376/3241 cut-off events. [2024-06-27 19:18:23,570 INFO L125 PetriNetUnfolderBase]: For 127807/128044 co-relation queries the response was YES. [2024-06-27 19:18:23,595 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. [2024-06-27 19:18:23,605 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 135 selfloop transitions, 22 changer transitions 2/277 dead transitions. [2024-06-27 19:18:23,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 277 transitions, 3805 flow [2024-06-27 19:18:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:23,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-06-27 19:18:23,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6895522388059702 [2024-06-27 19:18:23,606 INFO L175 Difference]: Start difference. First operand has 219 places, 259 transitions, 3233 flow. Second operand 5 states and 231 transitions. [2024-06-27 19:18:23,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 277 transitions, 3805 flow [2024-06-27 19:18:23,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 277 transitions, 3758 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:23,802 INFO L231 Difference]: Finished difference. Result has 221 places, 259 transitions, 3234 flow [2024-06-27 19:18:23,802 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} [2024-06-27 19:18:23,802 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 161 predicate places. [2024-06-27 19:18:23,802 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 259 transitions, 3234 flow [2024-06-27 19:18:23,802 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) [2024-06-27 19:18:23,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:23,803 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] [2024-06-27 19:18:23,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:18:23,803 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)] === [2024-06-27 19:18:23,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:23,803 INFO L85 PathProgramCache]: Analyzing trace with hash -373458424, now seen corresponding path program 1 times [2024-06-27 19:18:23,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:23,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107850739] [2024-06-27 19:18:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:23,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:23,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:23,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107850739] [2024-06-27 19:18:23,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107850739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:23,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:23,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248849169] [2024-06-27 19:18:23,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:23,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:23,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:23,882 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) [2024-06-27 19:18:23,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:23,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:23,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:24,318 INFO L124 PetriNetUnfolderBase]: 1367/3219 cut-off events. [2024-06-27 19:18:24,318 INFO L125 PetriNetUnfolderBase]: For 132669/132898 co-relation queries the response was YES. [2024-06-27 19:18:24,342 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. [2024-06-27 19:18:24,353 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 129 selfloop transitions, 31 changer transitions 1/279 dead transitions. [2024-06-27 19:18:24,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 279 transitions, 3885 flow [2024-06-27 19:18:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-06-27 19:18:24,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6955223880597015 [2024-06-27 19:18:24,354 INFO L175 Difference]: Start difference. First operand has 221 places, 259 transitions, 3234 flow. Second operand 5 states and 233 transitions. [2024-06-27 19:18:24,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 279 transitions, 3885 flow [2024-06-27 19:18:24,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 279 transitions, 3838 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:24,552 INFO L231 Difference]: Finished difference. Result has 223 places, 264 transitions, 3362 flow [2024-06-27 19:18:24,552 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} [2024-06-27 19:18:24,552 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 163 predicate places. [2024-06-27 19:18:24,552 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 264 transitions, 3362 flow [2024-06-27 19:18:24,553 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) [2024-06-27 19:18:24,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:24,553 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] [2024-06-27 19:18:24,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:18:24,553 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)] === [2024-06-27 19:18:24,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:24,554 INFO L85 PathProgramCache]: Analyzing trace with hash -373459416, now seen corresponding path program 1 times [2024-06-27 19:18:24,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:24,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192236160] [2024-06-27 19:18:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:24,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:24,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:24,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192236160] [2024-06-27 19:18:24,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192236160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:24,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:24,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:24,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333399523] [2024-06-27 19:18:24,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:24,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:18:24,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:24,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:18:24,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:18:24,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 67 [2024-06-27 19:18:24,591 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) [2024-06-27 19:18:24,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:24,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 67 [2024-06-27 19:18:24,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:24,966 INFO L124 PetriNetUnfolderBase]: 1208/2776 cut-off events. [2024-06-27 19:18:24,966 INFO L125 PetriNetUnfolderBase]: For 58241/58510 co-relation queries the response was YES. [2024-06-27 19:18:24,985 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. [2024-06-27 19:18:24,992 INFO L140 encePairwiseOnDemand]: 54/67 looper letters, 115 selfloop transitions, 28 changer transitions 1/250 dead transitions. [2024-06-27 19:18:24,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 250 transitions, 3399 flow [2024-06-27 19:18:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-06-27 19:18:24,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746268656716418 [2024-06-27 19:18:24,993 INFO L175 Difference]: Start difference. First operand has 223 places, 264 transitions, 3362 flow. Second operand 5 states and 226 transitions. [2024-06-27 19:18:24,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 250 transitions, 3399 flow [2024-06-27 19:18:25,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 250 transitions, 3223 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:25,187 INFO L231 Difference]: Finished difference. Result has 220 places, 233 transitions, 2865 flow [2024-06-27 19:18:25,187 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} [2024-06-27 19:18:25,187 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 160 predicate places. [2024-06-27 19:18:25,188 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 233 transitions, 2865 flow [2024-06-27 19:18:25,188 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) [2024-06-27 19:18:25,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:25,188 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] [2024-06-27 19:18:25,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:18:25,188 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)] === [2024-06-27 19:18:25,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:25,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1786782764, now seen corresponding path program 1 times [2024-06-27 19:18:25,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:25,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881409496] [2024-06-27 19:18:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:25,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:25,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:25,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881409496] [2024-06-27 19:18:25,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881409496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:25,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:25,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:25,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992094847] [2024-06-27 19:18:25,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:25,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:25,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:25,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:25,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:25,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:25,255 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) [2024-06-27 19:18:25,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:25,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:25,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:25,615 INFO L124 PetriNetUnfolderBase]: 1090/2666 cut-off events. [2024-06-27 19:18:25,615 INFO L125 PetriNetUnfolderBase]: For 95032/95182 co-relation queries the response was YES. [2024-06-27 19:18:25,633 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. [2024-06-27 19:18:25,687 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 115 selfloop transitions, 34 changer transitions 1/253 dead transitions. [2024-06-27 19:18:25,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 253 transitions, 3451 flow [2024-06-27 19:18:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2024-06-27 19:18:25,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7044776119402985 [2024-06-27 19:18:25,688 INFO L175 Difference]: Start difference. First operand has 220 places, 233 transitions, 2865 flow. Second operand 5 states and 236 transitions. [2024-06-27 19:18:25,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 253 transitions, 3451 flow [2024-06-27 19:18:25,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 253 transitions, 3355 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:25,881 INFO L231 Difference]: Finished difference. Result has 223 places, 236 transitions, 2902 flow [2024-06-27 19:18:25,881 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} [2024-06-27 19:18:25,882 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 163 predicate places. [2024-06-27 19:18:25,882 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 236 transitions, 2902 flow [2024-06-27 19:18:25,882 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) [2024-06-27 19:18:25,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:25,882 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] [2024-06-27 19:18:25,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:18:25,882 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)] === [2024-06-27 19:18:25,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:25,882 INFO L85 PathProgramCache]: Analyzing trace with hash 906237214, now seen corresponding path program 2 times [2024-06-27 19:18:25,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:25,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531989734] [2024-06-27 19:18:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:25,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:25,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:25,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531989734] [2024-06-27 19:18:25,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531989734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:25,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:25,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:25,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471670327] [2024-06-27 19:18:25,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:25,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:25,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:25,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:25,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:25,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:25,964 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) [2024-06-27 19:18:25,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:25,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:25,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:26,379 INFO L124 PetriNetUnfolderBase]: 1067/2627 cut-off events. [2024-06-27 19:18:26,380 INFO L125 PetriNetUnfolderBase]: For 94200/94349 co-relation queries the response was YES. [2024-06-27 19:18:26,399 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. [2024-06-27 19:18:26,409 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 126 selfloop transitions, 26 changer transitions 1/256 dead transitions. [2024-06-27 19:18:26,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 256 transitions, 3511 flow [2024-06-27 19:18:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 238 transitions. [2024-06-27 19:18:26,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7104477611940299 [2024-06-27 19:18:26,410 INFO L175 Difference]: Start difference. First operand has 223 places, 236 transitions, 2902 flow. Second operand 5 states and 238 transitions. [2024-06-27 19:18:26,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 256 transitions, 3511 flow [2024-06-27 19:18:26,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 256 transitions, 3449 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:26,617 INFO L231 Difference]: Finished difference. Result has 227 places, 239 transitions, 2996 flow [2024-06-27 19:18:26,617 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} [2024-06-27 19:18:26,617 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 167 predicate places. [2024-06-27 19:18:26,617 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 239 transitions, 2996 flow [2024-06-27 19:18:26,618 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) [2024-06-27 19:18:26,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:26,618 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] [2024-06-27 19:18:26,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:18:26,618 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)] === [2024-06-27 19:18:26,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:26,618 INFO L85 PathProgramCache]: Analyzing trace with hash -580150066, now seen corresponding path program 1 times [2024-06-27 19:18:26,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:26,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509127597] [2024-06-27 19:18:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:26,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:26,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:26,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509127597] [2024-06-27 19:18:26,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509127597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:26,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:26,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:26,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614170303] [2024-06-27 19:18:26,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:26,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:26,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:26,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:26,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:26,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:26,690 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) [2024-06-27 19:18:26,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:26,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:26,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:27,093 INFO L124 PetriNetUnfolderBase]: 1072/2662 cut-off events. [2024-06-27 19:18:27,095 INFO L125 PetriNetUnfolderBase]: For 82027/82165 co-relation queries the response was YES. [2024-06-27 19:18:27,115 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. [2024-06-27 19:18:27,122 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 112 selfloop transitions, 35 changer transitions 9/255 dead transitions. [2024-06-27 19:18:27,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 255 transitions, 3521 flow [2024-06-27 19:18:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2024-06-27 19:18:27,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6985074626865672 [2024-06-27 19:18:27,124 INFO L175 Difference]: Start difference. First operand has 227 places, 239 transitions, 2996 flow. Second operand 5 states and 234 transitions. [2024-06-27 19:18:27,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 255 transitions, 3521 flow [2024-06-27 19:18:27,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 255 transitions, 3439 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:27,330 INFO L231 Difference]: Finished difference. Result has 229 places, 231 transitions, 2883 flow [2024-06-27 19:18:27,331 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} [2024-06-27 19:18:27,331 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 169 predicate places. [2024-06-27 19:18:27,331 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 231 transitions, 2883 flow [2024-06-27 19:18:27,331 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) [2024-06-27 19:18:27,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:27,331 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] [2024-06-27 19:18:27,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:18:27,332 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)] === [2024-06-27 19:18:27,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:27,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1269845506, now seen corresponding path program 2 times [2024-06-27 19:18:27,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:27,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136361645] [2024-06-27 19:18:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:27,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:27,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:27,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136361645] [2024-06-27 19:18:27,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136361645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:27,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:27,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:27,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318197242] [2024-06-27 19:18:27,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:27,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:27,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:27,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:27,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:27,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:27,403 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) [2024-06-27 19:18:27,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:27,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:27,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:27,747 INFO L124 PetriNetUnfolderBase]: 1046/2627 cut-off events. [2024-06-27 19:18:27,747 INFO L125 PetriNetUnfolderBase]: For 76843/76973 co-relation queries the response was YES. [2024-06-27 19:18:27,766 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. [2024-06-27 19:18:27,773 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 105 selfloop transitions, 18 changer transitions 35/244 dead transitions. [2024-06-27 19:18:27,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 244 transitions, 3377 flow [2024-06-27 19:18:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-06-27 19:18:27,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6895522388059702 [2024-06-27 19:18:27,774 INFO L175 Difference]: Start difference. First operand has 229 places, 231 transitions, 2883 flow. Second operand 5 states and 231 transitions. [2024-06-27 19:18:27,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 244 transitions, 3377 flow [2024-06-27 19:18:27,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 244 transitions, 3231 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:27,986 INFO L231 Difference]: Finished difference. Result has 228 places, 198 transitions, 2367 flow [2024-06-27 19:18:27,986 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} [2024-06-27 19:18:27,986 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 168 predicate places. [2024-06-27 19:18:27,987 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 198 transitions, 2367 flow [2024-06-27 19:18:27,987 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) [2024-06-27 19:18:27,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:27,987 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] [2024-06-27 19:18:27,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:18:27,987 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)] === [2024-06-27 19:18:27,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash 885680432, now seen corresponding path program 2 times [2024-06-27 19:18:27,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:27,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390218033] [2024-06-27 19:18:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:27,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390218033] [2024-06-27 19:18:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390218033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:28,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:28,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:28,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76190380] [2024-06-27 19:18:28,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:18:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:18:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:18:28,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 67 [2024-06-27 19:18:28,044 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) [2024-06-27 19:18:28,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:28,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 67 [2024-06-27 19:18:28,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:28,263 INFO L124 PetriNetUnfolderBase]: 761/1848 cut-off events. [2024-06-27 19:18:28,263 INFO L125 PetriNetUnfolderBase]: For 26229/26332 co-relation queries the response was YES. [2024-06-27 19:18:28,276 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. [2024-06-27 19:18:28,279 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 62 selfloop transitions, 0 changer transitions 50/174 dead transitions. [2024-06-27 19:18:28,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 174 transitions, 2248 flow [2024-06-27 19:18:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 213 transitions. [2024-06-27 19:18:28,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358208955223881 [2024-06-27 19:18:28,280 INFO L175 Difference]: Start difference. First operand has 228 places, 198 transitions, 2367 flow. Second operand 5 states and 213 transitions. [2024-06-27 19:18:28,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 174 transitions, 2248 flow [2024-06-27 19:18:28,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 174 transitions, 1964 flow, removed 29 selfloop flow, removed 23 redundant places. [2024-06-27 19:18:28,362 INFO L231 Difference]: Finished difference. Result has 205 places, 124 transitions, 1287 flow [2024-06-27 19:18:28,362 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} [2024-06-27 19:18:28,363 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 145 predicate places. [2024-06-27 19:18:28,363 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 124 transitions, 1287 flow [2024-06-27 19:18:28,363 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) [2024-06-27 19:18:28,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:28,363 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] [2024-06-27 19:18:28,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:18:28,363 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)] === [2024-06-27 19:18:28,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:28,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2064755952, now seen corresponding path program 2 times [2024-06-27 19:18:28,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:28,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386957212] [2024-06-27 19:18:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:28,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:28,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:28,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386957212] [2024-06-27 19:18:28,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386957212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:28,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:28,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:28,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91495157] [2024-06-27 19:18:28,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:28,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:28,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:28,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:28,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:28,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:28,428 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) [2024-06-27 19:18:28,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:28,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:28,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:28,581 INFO L124 PetriNetUnfolderBase]: 450/1213 cut-off events. [2024-06-27 19:18:28,581 INFO L125 PetriNetUnfolderBase]: For 25209/25287 co-relation queries the response was YES. [2024-06-27 19:18:28,588 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. [2024-06-27 19:18:28,590 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 59 selfloop transitions, 10 changer transitions 34/135 dead transitions. [2024-06-27 19:18:28,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 135 transitions, 1637 flow [2024-06-27 19:18:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 224 transitions. [2024-06-27 19:18:28,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6686567164179105 [2024-06-27 19:18:28,591 INFO L175 Difference]: Start difference. First operand has 205 places, 124 transitions, 1287 flow. Second operand 5 states and 224 transitions. [2024-06-27 19:18:28,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 135 transitions, 1637 flow [2024-06-27 19:18:28,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 135 transitions, 1499 flow, removed 45 selfloop flow, removed 16 redundant places. [2024-06-27 19:18:28,636 INFO L231 Difference]: Finished difference. Result has 179 places, 93 transitions, 935 flow [2024-06-27 19:18:28,636 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} [2024-06-27 19:18:28,637 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 119 predicate places. [2024-06-27 19:18:28,637 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 93 transitions, 935 flow [2024-06-27 19:18:28,637 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) [2024-06-27 19:18:28,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:28,637 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] [2024-06-27 19:18:28,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:18:28,637 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)] === [2024-06-27 19:18:28,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:28,637 INFO L85 PathProgramCache]: Analyzing trace with hash 312717273, now seen corresponding path program 1 times [2024-06-27 19:18:28,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:28,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61509727] [2024-06-27 19:18:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:28,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:28,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:28,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61509727] [2024-06-27 19:18:28,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61509727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:28,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:28,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877993914] [2024-06-27 19:18:28,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:28,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:28,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:28,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:28,715 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) [2024-06-27 19:18:28,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:28,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:28,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:28,825 INFO L124 PetriNetUnfolderBase]: 354/956 cut-off events. [2024-06-27 19:18:28,825 INFO L125 PetriNetUnfolderBase]: For 14162/14217 co-relation queries the response was YES. [2024-06-27 19:18:28,830 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. [2024-06-27 19:18:28,832 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 52 selfloop transitions, 22 changer transitions 2/108 dead transitions. [2024-06-27 19:18:28,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 108 transitions, 1245 flow [2024-06-27 19:18:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2024-06-27 19:18:28,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805970149253732 [2024-06-27 19:18:28,834 INFO L175 Difference]: Start difference. First operand has 179 places, 93 transitions, 935 flow. Second operand 5 states and 228 transitions. [2024-06-27 19:18:28,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 108 transitions, 1245 flow [2024-06-27 19:18:28,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 108 transitions, 1099 flow, removed 38 selfloop flow, removed 17 redundant places. [2024-06-27 19:18:28,862 INFO L231 Difference]: Finished difference. Result has 151 places, 93 transitions, 870 flow [2024-06-27 19:18:28,862 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} [2024-06-27 19:18:28,862 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 91 predicate places. [2024-06-27 19:18:28,862 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 93 transitions, 870 flow [2024-06-27 19:18:28,862 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) [2024-06-27 19:18:28,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:28,863 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] [2024-06-27 19:18:28,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:18:28,863 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)] === [2024-06-27 19:18:28,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash 454639271, now seen corresponding path program 1 times [2024-06-27 19:18:28,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:28,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954849532] [2024-06-27 19:18:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:28,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:28,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:28,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954849532] [2024-06-27 19:18:28,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954849532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:28,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:28,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:28,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190370447] [2024-06-27 19:18:28,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:28,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:28,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:28,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:28,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:28,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:28,927 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) [2024-06-27 19:18:28,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:28,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:28,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:29,024 INFO L124 PetriNetUnfolderBase]: 351/937 cut-off events. [2024-06-27 19:18:29,025 INFO L125 PetriNetUnfolderBase]: For 8915/8953 co-relation queries the response was YES. [2024-06-27 19:18:29,029 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. [2024-06-27 19:18:29,030 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 52 selfloop transitions, 18 changer transitions 2/104 dead transitions. [2024-06-27 19:18:29,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 104 transitions, 1092 flow [2024-06-27 19:18:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2024-06-27 19:18:29,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6597014925373135 [2024-06-27 19:18:29,031 INFO L175 Difference]: Start difference. First operand has 151 places, 93 transitions, 870 flow. Second operand 5 states and 221 transitions. [2024-06-27 19:18:29,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 104 transitions, 1092 flow [2024-06-27 19:18:29,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 104 transitions, 1037 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:29,054 INFO L231 Difference]: Finished difference. Result has 150 places, 93 transitions, 860 flow [2024-06-27 19:18:29,054 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} [2024-06-27 19:18:29,054 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 90 predicate places. [2024-06-27 19:18:29,054 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 93 transitions, 860 flow [2024-06-27 19:18:29,055 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) [2024-06-27 19:18:29,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:29,055 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] [2024-06-27 19:18:29,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:18:29,055 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)] === [2024-06-27 19:18:29,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:29,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1218674732, now seen corresponding path program 1 times [2024-06-27 19:18:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:29,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934256899] [2024-06-27 19:18:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:29,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:29,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:29,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934256899] [2024-06-27 19:18:29,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934256899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:29,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:29,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109715934] [2024-06-27 19:18:29,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:29,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:29,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:29,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:29,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:29,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:29,117 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) [2024-06-27 19:18:29,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:29,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:29,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:29,210 INFO L124 PetriNetUnfolderBase]: 338/910 cut-off events. [2024-06-27 19:18:29,210 INFO L125 PetriNetUnfolderBase]: For 7774/7809 co-relation queries the response was YES. [2024-06-27 19:18:29,214 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. [2024-06-27 19:18:29,215 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 36 selfloop transitions, 10 changer transitions 38/107 dead transitions. [2024-06-27 19:18:29,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 107 transitions, 1096 flow [2024-06-27 19:18:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2024-06-27 19:18:29,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776119402985075 [2024-06-27 19:18:29,215 INFO L175 Difference]: Start difference. First operand has 150 places, 93 transitions, 860 flow. Second operand 5 states and 227 transitions. [2024-06-27 19:18:29,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 107 transitions, 1096 flow [2024-06-27 19:18:29,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 107 transitions, 1059 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:29,231 INFO L231 Difference]: Finished difference. Result has 152 places, 63 transitions, 557 flow [2024-06-27 19:18:29,231 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} [2024-06-27 19:18:29,231 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 92 predicate places. [2024-06-27 19:18:29,231 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 63 transitions, 557 flow [2024-06-27 19:18:29,231 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) [2024-06-27 19:18:29,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:29,231 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] [2024-06-27 19:18:29,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:18:29,232 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)] === [2024-06-27 19:18:29,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:29,232 INFO L85 PathProgramCache]: Analyzing trace with hash 816148400, now seen corresponding path program 1 times [2024-06-27 19:18:29,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:29,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025029592] [2024-06-27 19:18:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:29,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:29,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:29,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025029592] [2024-06-27 19:18:29,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025029592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:29,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:29,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:29,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401842926] [2024-06-27 19:18:29,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:29,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:29,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:29,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:29,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:29,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:29,300 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) [2024-06-27 19:18:29,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:29,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:29,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:29,347 INFO L124 PetriNetUnfolderBase]: 159/424 cut-off events. [2024-06-27 19:18:29,347 INFO L125 PetriNetUnfolderBase]: For 5117/5139 co-relation queries the response was YES. [2024-06-27 19:18:29,348 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. [2024-06-27 19:18:29,349 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 33 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-27 19:18:29,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 68 transitions, 657 flow [2024-06-27 19:18:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-06-27 19:18:29,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6298507462686567 [2024-06-27 19:18:29,350 INFO L175 Difference]: Start difference. First operand has 152 places, 63 transitions, 557 flow. Second operand 5 states and 211 transitions. [2024-06-27 19:18:29,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 68 transitions, 657 flow [2024-06-27 19:18:29,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 68 transitions, 484 flow, removed 19 selfloop flow, removed 44 redundant places. [2024-06-27 19:18:29,356 INFO L231 Difference]: Finished difference. Result has 98 places, 63 transitions, 412 flow [2024-06-27 19:18:29,356 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} [2024-06-27 19:18:29,356 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 38 predicate places. [2024-06-27 19:18:29,357 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 63 transitions, 412 flow [2024-06-27 19:18:29,357 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) [2024-06-27 19:18:29,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:29,357 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] [2024-06-27 19:18:29,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:18:29,357 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)] === [2024-06-27 19:18:29,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:29,357 INFO L85 PathProgramCache]: Analyzing trace with hash -264753018, now seen corresponding path program 1 times [2024-06-27 19:18:29,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:29,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459123516] [2024-06-27 19:18:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:29,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:29,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:29,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459123516] [2024-06-27 19:18:29,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459123516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:29,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:29,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:29,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258685774] [2024-06-27 19:18:29,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:29,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:29,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:29,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:29,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 67 [2024-06-27 19:18:29,452 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) [2024-06-27 19:18:29,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:29,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 67 [2024-06-27 19:18:29,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:29,492 INFO L124 PetriNetUnfolderBase]: 143/399 cut-off events. [2024-06-27 19:18:29,492 INFO L125 PetriNetUnfolderBase]: For 2045/2063 co-relation queries the response was YES. [2024-06-27 19:18:29,493 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. [2024-06-27 19:18:29,493 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 0 selfloop transitions, 0 changer transitions 67/67 dead transitions. [2024-06-27 19:18:29,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 67 transitions, 474 flow [2024-06-27 19:18:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 209 transitions. [2024-06-27 19:18:29,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238805970149254 [2024-06-27 19:18:29,494 INFO L175 Difference]: Start difference. First operand has 98 places, 63 transitions, 412 flow. Second operand 5 states and 209 transitions. [2024-06-27 19:18:29,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 67 transitions, 474 flow [2024-06-27 19:18:29,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 67 transitions, 398 flow, removed 0 selfloop flow, removed 21 redundant places. [2024-06-27 19:18:29,496 INFO L231 Difference]: Finished difference. Result has 80 places, 0 transitions, 0 flow [2024-06-27 19:18:29,496 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} [2024-06-27 19:18:29,497 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-06-27 19:18:29,497 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 0 transitions, 0 flow [2024-06-27 19:18:29,497 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) [2024-06-27 19:18:29,499 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-27 19:18:29,499 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-27 19:18:29,499 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-27 19:18:29,499 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-27 19:18:29,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:18:29,500 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] [2024-06-27 19:18:29,502 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 19:18:29,502 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 19:18:29,504 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 19:18:29,504 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 19:18:29,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 07:18:29 BasicIcfg [2024-06-27 19:18:29,505 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 19:18:29,506 INFO L158 Benchmark]: Toolchain (without parser) took 39994.54ms. Allocated memory was 155.2MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 77.9MB in the beginning and 1.0GB in the end (delta: -967.3MB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2024-06-27 19:18:29,506 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 155.2MB. Free memory was 106.0MB in the beginning and 105.8MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 19:18:29,506 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 155.2MB. Free memory is still 124.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 19:18:29,506 INFO L158 Benchmark]: CACSL2BoogieTranslator took 433.71ms. Allocated memory was 155.2MB in the beginning and 201.3MB in the end (delta: 46.1MB). Free memory was 77.6MB in the beginning and 156.2MB in the end (delta: -78.6MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. [2024-06-27 19:18:29,506 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.78ms. Allocated memory is still 201.3MB. Free memory was 156.2MB in the beginning and 154.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 19:18:29,507 INFO L158 Benchmark]: Boogie Preprocessor took 57.52ms. Allocated memory is still 201.3MB. Free memory was 154.1MB in the beginning and 152.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 19:18:29,507 INFO L158 Benchmark]: RCFGBuilder took 384.66ms. Allocated memory is still 201.3MB. Free memory was 152.0MB in the beginning and 128.9MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-06-27 19:18:29,507 INFO L158 Benchmark]: TraceAbstraction took 39041.92ms. Allocated memory was 201.3MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 128.9MB in the beginning and 1.0GB in the end (delta: -916.2MB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2024-06-27 19:18:29,508 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 155.2MB. Free memory was 106.0MB in the beginning and 105.8MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.15ms. Allocated memory is still 155.2MB. Free memory is still 124.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 433.71ms. Allocated memory was 155.2MB in the beginning and 201.3MB in the end (delta: 46.1MB). Free memory was 77.6MB in the beginning and 156.2MB in the end (delta: -78.6MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.78ms. Allocated memory is still 201.3MB. Free memory was 156.2MB in the beginning and 154.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.52ms. Allocated memory is still 201.3MB. Free memory was 154.1MB in the beginning and 152.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 384.66ms. Allocated memory is still 201.3MB. Free memory was 152.0MB in the beginning and 128.9MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 39041.92ms. Allocated memory was 201.3MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 128.9MB in the beginning and 1.0GB in the end (delta: -916.2MB). Peak memory consumption was 1.5GB. 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: 38.9s, OverallIterations: 59, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 36.1s, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s 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! [2024-06-27 19:18:29,545 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