./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/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/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cdf629ba70521b99830442583c87012a34d164ca28f01f7e59d76ae2f1e525ff --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:15:45,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:15:45,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:15:45,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:15:45,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:15:45,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:15:45,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:15:45,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:15:45,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:15:45,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:15:45,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:15:45,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:15:45,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:15:45,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:15:45,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:15:45,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:15:45,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:15:45,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:15:45,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:15:45,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:15:45,293 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:15:45,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:15:45,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:15:45,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:15:45,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:15:45,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:15:45,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:15:45,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:15:45,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:15:45,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:15:45,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:15:45,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:15:45,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:15:45,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:15:45,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:15:45,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:15:45,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:15:45,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:15:45,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:15:45,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:15:45,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:15:45,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:15:45,312 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:15:45,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:15:45,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:15:45,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:15:45,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:15:45,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:15:45,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:15:45,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:15:45,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:15:45,333 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:15:45,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:15:45,334 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:15:45,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:15:45,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:15:45,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:15:45,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:15:45,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:15:45,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:15:45,335 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:15:45,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:15:45,335 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:15:45,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:15:45,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:15:45,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:15:45,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:15:45,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:15:45,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:15:45,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:15:45,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:15:45,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:15:45,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:15:45,337 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:15:45,337 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:15:45,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:15:45,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdf629ba70521b99830442583c87012a34d164ca28f01f7e59d76ae2f1e525ff [2022-07-19 21:15:45,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:15:45,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:15:45,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:15:45,568 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:15:45,568 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:15:45,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i [2022-07-19 21:15:45,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eb1e4482/da16f31e89e942f6b8b4b3a5177f7b53/FLAG835bd0070 [2022-07-19 21:15:46,040 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:15:46,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i [2022-07-19 21:15:46,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eb1e4482/da16f31e89e942f6b8b4b3a5177f7b53/FLAG835bd0070 [2022-07-19 21:15:46,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eb1e4482/da16f31e89e942f6b8b4b3a5177f7b53 [2022-07-19 21:15:46,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:15:46,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:15:46,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:15:46,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:15:46,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:15:46,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c208832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46, skipping insertion in model container [2022-07-19 21:15:46,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:15:46,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:15:46,330 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i[30035,30048] [2022-07-19 21:15:46,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:15:46,350 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:15:46,384 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i[30035,30048] [2022-07-19 21:15:46,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:15:46,410 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:15:46,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46 WrapperNode [2022-07-19 21:15:46,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:15:46,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:15:46,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:15:46,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:15:46,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,451 INFO L137 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2022-07-19 21:15:46,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:15:46,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:15:46,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:15:46,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:15:46,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:15:46,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:15:46,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:15:46,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:15:46,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46" (1/1) ... [2022-07-19 21:15:46,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:15:46,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:46,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:15:46,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:15:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-19 21:15:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-19 21:15:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-19 21:15:46,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-19 21:15:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:15:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:15:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:15:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:15:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:15:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:15:46,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:15:46,534 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:15:46,618 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:15:46,619 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:15:46,772 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:15:46,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:15:46,777 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 21:15:46,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:46 BoogieIcfgContainer [2022-07-19 21:15:46,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:15:46,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:15:46,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:15:46,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:15:46,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:15:46" (1/3) ... [2022-07-19 21:15:46,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68848e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:46, skipping insertion in model container [2022-07-19 21:15:46,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:46" (2/3) ... [2022-07-19 21:15:46,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68848e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:46, skipping insertion in model container [2022-07-19 21:15:46,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:46" (3/3) ... [2022-07-19 21:15:46,784 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-loop-bound-1.i [2022-07-19 21:15:46,788 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:15:46,794 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:15:46,794 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:15:46,794 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:15:46,850 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:15:46,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 80 places, 77 transitions, 164 flow [2022-07-19 21:15:46,926 INFO L129 PetriNetUnfolder]: 4/90 cut-off events. [2022-07-19 21:15:46,927 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:46,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 90 events. 4/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2022-07-19 21:15:46,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 77 transitions, 164 flow [2022-07-19 21:15:46,934 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 160 flow [2022-07-19 21:15:46,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:46,944 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@61b2ce58, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@77b78e0b [2022-07-19 21:15:46,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:15:46,953 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2022-07-19 21:15:46,953 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:46,953 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:46,954 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:46,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:15:46,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:46,958 INFO L85 PathProgramCache]: Analyzing trace with hash 25235032, now seen corresponding path program 1 times [2022-07-19 21:15:46,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:46,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141911807] [2022-07-19 21:15:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:46,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:47,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:47,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141911807] [2022-07-19 21:15:47,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141911807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:47,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:47,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:15:47,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901738346] [2022-07-19 21:15:47,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:47,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:15:47,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:15:47,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:15:47,346 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:15:47,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 54.625) internal successors, (437), 8 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:47,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:47,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:15:47,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:47,559 INFO L129 PetriNetUnfolder]: 71/256 cut-off events. [2022-07-19 21:15:47,560 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:15:47,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 256 events. 71/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1313 event pairs, 2 based on Foata normal form. 4/229 useless extension candidates. Maximal degree in co-relation 378. Up to 38 conditions per place. [2022-07-19 21:15:47,564 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 28 selfloop transitions, 11 changer transitions 6/97 dead transitions. [2022-07-19 21:15:47,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 97 transitions, 298 flow [2022-07-19 21:15:47,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:15:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:15:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 639 transitions. [2022-07-19 21:15:47,581 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7544273907910272 [2022-07-19 21:15:47,582 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 639 transitions. [2022-07-19 21:15:47,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 639 transitions. [2022-07-19 21:15:47,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:47,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 639 transitions. [2022-07-19 21:15:47,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.09090909090909) internal successors, (639), 11 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:47,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 77.0) internal successors, (924), 12 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:47,600 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 77.0) internal successors, (924), 12 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:47,602 INFO L186 Difference]: Start difference. First operand has 79 places, 76 transitions, 160 flow. Second operand 11 states and 639 transitions. [2022-07-19 21:15:47,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 97 transitions, 298 flow [2022-07-19 21:15:47,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 97 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:15:47,610 INFO L242 Difference]: Finished difference. Result has 91 places, 77 transitions, 203 flow [2022-07-19 21:15:47,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=203, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2022-07-19 21:15:47,615 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2022-07-19 21:15:47,615 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 203 flow [2022-07-19 21:15:47,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 54.625) internal successors, (437), 8 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:47,615 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:47,616 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:47,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:15:47,616 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:15:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:47,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1080909318, now seen corresponding path program 1 times [2022-07-19 21:15:47,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:47,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242566541] [2022-07-19 21:15:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:47,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:47,669 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:15:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:47,714 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:15:47,715 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:15:47,716 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:15:47,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:15:47,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-19 21:15:47,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:15:47,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:15:47,717 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:15:47,719 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:15:47,719 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:15:47,734 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:15:47,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 102 places, 96 transitions, 216 flow [2022-07-19 21:15:47,751 INFO L129 PetriNetUnfolder]: 5/115 cut-off events. [2022-07-19 21:15:47,751 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:15:47,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 115 events. 5/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 124. Up to 6 conditions per place. [2022-07-19 21:15:47,752 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 96 transitions, 216 flow [2022-07-19 21:15:47,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 82 transitions, 179 flow [2022-07-19 21:15:47,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:47,754 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@61b2ce58, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@77b78e0b [2022-07-19 21:15:47,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:15:47,758 INFO L129 PetriNetUnfolder]: 3/55 cut-off events. [2022-07-19 21:15:47,758 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:47,758 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:47,759 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:47,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:15:47,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1995614165, now seen corresponding path program 1 times [2022-07-19 21:15:47,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:47,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562389511] [2022-07-19 21:15:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:47,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:47,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:47,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562389511] [2022-07-19 21:15:47,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562389511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:47,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:47,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:15:47,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246214177] [2022-07-19 21:15:47,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:47,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:15:47,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:47,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:15:47,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:15:47,906 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 96 [2022-07-19 21:15:47,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 179 flow. Second operand has 8 states, 8 states have (on average 66.625) internal successors, (533), 8 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:47,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:47,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 96 [2022-07-19 21:15:47,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:48,150 INFO L129 PetriNetUnfolder]: 429/995 cut-off events. [2022-07-19 21:15:48,151 INFO L130 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-07-19 21:15:48,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 995 events. 429/995 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6972 event pairs, 24 based on Foata normal form. 19/894 useless extension candidates. Maximal degree in co-relation 1746. Up to 213 conditions per place. [2022-07-19 21:15:48,156 INFO L132 encePairwiseOnDemand]: 83/96 looper letters, 54 selfloop transitions, 14 changer transitions 6/129 dead transitions. [2022-07-19 21:15:48,156 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 129 transitions, 457 flow [2022-07-19 21:15:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:15:48,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:15:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 800 transitions. [2022-07-19 21:15:48,158 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7575757575757576 [2022-07-19 21:15:48,158 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 800 transitions. [2022-07-19 21:15:48,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 800 transitions. [2022-07-19 21:15:48,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:48,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 800 transitions. [2022-07-19 21:15:48,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 72.72727272727273) internal successors, (800), 11 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:48,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 96.0) internal successors, (1152), 12 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:48,161 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 96.0) internal successors, (1152), 12 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:48,162 INFO L186 Difference]: Start difference. First operand has 87 places, 82 transitions, 179 flow. Second operand 11 states and 800 transitions. [2022-07-19 21:15:48,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 129 transitions, 457 flow [2022-07-19 21:15:48,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 129 transitions, 454 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-19 21:15:48,164 INFO L242 Difference]: Finished difference. Result has 100 places, 87 transitions, 254 flow [2022-07-19 21:15:48,164 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=254, PETRI_PLACES=100, PETRI_TRANSITIONS=87} [2022-07-19 21:15:48,165 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 13 predicate places. [2022-07-19 21:15:48,165 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 87 transitions, 254 flow [2022-07-19 21:15:48,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.625) internal successors, (533), 8 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:48,165 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:48,165 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:48,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:15:48,166 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:15:48,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:48,166 INFO L85 PathProgramCache]: Analyzing trace with hash -120525765, now seen corresponding path program 1 times [2022-07-19 21:15:48,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:48,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784060940] [2022-07-19 21:15:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:48,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:48,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:48,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784060940] [2022-07-19 21:15:48,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784060940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:48,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:48,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 21:15:48,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205520317] [2022-07-19 21:15:48,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:48,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:15:48,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:48,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:15:48,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:15:48,344 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 96 [2022-07-19 21:15:48,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 87 transitions, 254 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:48,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:48,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 96 [2022-07-19 21:15:48,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:48,758 INFO L129 PetriNetUnfolder]: 643/1483 cut-off events. [2022-07-19 21:15:48,759 INFO L130 PetriNetUnfolder]: For 804/804 co-relation queries the response was YES. [2022-07-19 21:15:48,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3529 conditions, 1483 events. 643/1483 cut-off events. For 804/804 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 11891 event pairs, 36 based on Foata normal form. 15/1333 useless extension candidates. Maximal degree in co-relation 3471. Up to 166 conditions per place. [2022-07-19 21:15:48,766 INFO L132 encePairwiseOnDemand]: 85/96 looper letters, 87 selfloop transitions, 36 changer transitions 13/190 dead transitions. [2022-07-19 21:15:48,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 190 transitions, 897 flow [2022-07-19 21:15:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 21:15:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-19 21:15:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1542 transitions. [2022-07-19 21:15:48,769 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7301136363636364 [2022-07-19 21:15:48,769 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1542 transitions. [2022-07-19 21:15:48,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1542 transitions. [2022-07-19 21:15:48,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:48,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1542 transitions. [2022-07-19 21:15:48,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 70.0909090909091) internal successors, (1542), 22 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:48,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 96.0) internal successors, (2208), 23 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:48,776 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 96.0) internal successors, (2208), 23 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:48,776 INFO L186 Difference]: Start difference. First operand has 100 places, 87 transitions, 254 flow. Second operand 22 states and 1542 transitions. [2022-07-19 21:15:48,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 190 transitions, 897 flow [2022-07-19 21:15:48,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 190 transitions, 891 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:15:48,783 INFO L242 Difference]: Finished difference. Result has 127 places, 110 transitions, 516 flow [2022-07-19 21:15:48,783 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=516, PETRI_PLACES=127, PETRI_TRANSITIONS=110} [2022-07-19 21:15:48,784 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 40 predicate places. [2022-07-19 21:15:48,784 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 110 transitions, 516 flow [2022-07-19 21:15:48,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:48,784 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:48,784 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:48,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:15:48,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:15:48,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:48,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1541547493, now seen corresponding path program 1 times [2022-07-19 21:15:48,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:48,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263920260] [2022-07-19 21:15:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:48,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:48,810 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:15:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:48,832 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:15:48,832 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:15:48,832 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:15:48,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:15:48,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-19 21:15:48,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:15:48,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:15:48,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:15:48,833 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:15:48,833 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:15:48,833 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:15:48,850 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:15:48,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 124 places, 115 transitions, 272 flow [2022-07-19 21:15:48,862 INFO L129 PetriNetUnfolder]: 6/140 cut-off events. [2022-07-19 21:15:48,862 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:15:48,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 140 events. 6/140 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 171 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2022-07-19 21:15:48,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 115 transitions, 272 flow [2022-07-19 21:15:48,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 88 transitions, 200 flow [2022-07-19 21:15:48,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:48,869 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@61b2ce58, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@77b78e0b [2022-07-19 21:15:48,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:15:48,872 INFO L129 PetriNetUnfolder]: 3/57 cut-off events. [2022-07-19 21:15:48,872 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:48,872 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:48,872 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:48,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:15:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:48,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1038200074, now seen corresponding path program 1 times [2022-07-19 21:15:48,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:48,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742985117] [2022-07-19 21:15:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:48,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:48,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:48,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742985117] [2022-07-19 21:15:48,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742985117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:48,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:48,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:15:48,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466591349] [2022-07-19 21:15:48,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:48,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:15:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:48,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:15:48,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:15:48,996 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 115 [2022-07-19 21:15:48,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 78.625) internal successors, (629), 8 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:48,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:48,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 115 [2022-07-19 21:15:48,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:49,368 INFO L129 PetriNetUnfolder]: 2081/3929 cut-off events. [2022-07-19 21:15:49,368 INFO L130 PetriNetUnfolder]: For 489/489 co-relation queries the response was YES. [2022-07-19 21:15:49,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7355 conditions, 3929 events. 2081/3929 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31212 event pairs, 169 based on Foata normal form. 76/3586 useless extension candidates. Maximal degree in co-relation 7303. Up to 1142 conditions per place. [2022-07-19 21:15:49,390 INFO L132 encePairwiseOnDemand]: 101/115 looper letters, 72 selfloop transitions, 17 changer transitions 6/153 dead transitions. [2022-07-19 21:15:49,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 153 transitions, 598 flow [2022-07-19 21:15:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:15:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:15:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 953 transitions. [2022-07-19 21:15:49,392 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7533596837944664 [2022-07-19 21:15:49,392 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 953 transitions. [2022-07-19 21:15:49,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 953 transitions. [2022-07-19 21:15:49,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:49,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 953 transitions. [2022-07-19 21:15:49,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:49,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:49,396 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:49,396 INFO L186 Difference]: Start difference. First operand has 95 places, 88 transitions, 200 flow. Second operand 11 states and 953 transitions. [2022-07-19 21:15:49,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 153 transitions, 598 flow [2022-07-19 21:15:49,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 579 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-19 21:15:49,399 INFO L242 Difference]: Finished difference. Result has 108 places, 96 transitions, 294 flow [2022-07-19 21:15:49,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=294, PETRI_PLACES=108, PETRI_TRANSITIONS=96} [2022-07-19 21:15:49,400 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 13 predicate places. [2022-07-19 21:15:49,400 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 96 transitions, 294 flow [2022-07-19 21:15:49,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 78.625) internal successors, (629), 8 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:49,401 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:49,401 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:49,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:15:49,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:15:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:49,401 INFO L85 PathProgramCache]: Analyzing trace with hash -777511255, now seen corresponding path program 1 times [2022-07-19 21:15:49,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:49,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687664493] [2022-07-19 21:15:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:49,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:49,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:49,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687664493] [2022-07-19 21:15:49,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687664493] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:49,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:49,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:15:49,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162971531] [2022-07-19 21:15:49,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:49,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:15:49,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:49,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:15:49,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:15:49,566 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 115 [2022-07-19 21:15:49,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 96 transitions, 294 flow. Second operand has 13 states, 13 states have (on average 72.61538461538461) internal successors, (944), 13 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:49,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:49,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 115 [2022-07-19 21:15:49,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:51,767 INFO L129 PetriNetUnfolder]: 9650/19953 cut-off events. [2022-07-19 21:15:51,767 INFO L130 PetriNetUnfolder]: For 13089/13089 co-relation queries the response was YES. [2022-07-19 21:15:51,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47112 conditions, 19953 events. 9650/19953 cut-off events. For 13089/13089 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 191604 event pairs, 1386 based on Foata normal form. 95/19103 useless extension candidates. Maximal degree in co-relation 47051. Up to 3081 conditions per place. [2022-07-19 21:15:51,889 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 234 selfloop transitions, 100 changer transitions 17/403 dead transitions. [2022-07-19 21:15:51,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 403 transitions, 2175 flow [2022-07-19 21:15:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 21:15:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-19 21:15:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2887 transitions. [2022-07-19 21:15:51,895 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6973429951690822 [2022-07-19 21:15:51,895 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2887 transitions. [2022-07-19 21:15:51,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2887 transitions. [2022-07-19 21:15:51,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:51,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2887 transitions. [2022-07-19 21:15:51,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 80.19444444444444) internal successors, (2887), 36 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:51,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 115.0) internal successors, (4255), 37 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:51,906 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 115.0) internal successors, (4255), 37 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:51,906 INFO L186 Difference]: Start difference. First operand has 108 places, 96 transitions, 294 flow. Second operand 36 states and 2887 transitions. [2022-07-19 21:15:51,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 403 transitions, 2175 flow [2022-07-19 21:15:51,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 403 transitions, 2169 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:15:52,000 INFO L242 Difference]: Finished difference. Result has 160 places, 191 transitions, 1164 flow [2022-07-19 21:15:52,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1164, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2022-07-19 21:15:52,001 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 65 predicate places. [2022-07-19 21:15:52,001 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 1164 flow [2022-07-19 21:15:52,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.61538461538461) internal successors, (944), 13 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:52,002 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:52,002 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:52,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:15:52,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:15:52,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:52,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1930678775, now seen corresponding path program 1 times [2022-07-19 21:15:52,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:52,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452793544] [2022-07-19 21:15:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:52,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:52,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:52,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452793544] [2022-07-19 21:15:52,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452793544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:52,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493284351] [2022-07-19 21:15:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:52,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:52,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:52,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:15:52,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:15:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:52,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:15:52,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:52,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:52,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493284351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:52,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:52,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-07-19 21:15:52,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233131334] [2022-07-19 21:15:52,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:52,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 21:15:52,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 21:15:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-07-19 21:15:52,654 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 115 [2022-07-19 21:15:52,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 1164 flow. Second operand has 25 states, 25 states have (on average 76.16) internal successors, (1904), 25 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:52,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:52,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 115 [2022-07-19 21:15:52,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:58,227 INFO L129 PetriNetUnfolder]: 19384/40113 cut-off events. [2022-07-19 21:15:58,227 INFO L130 PetriNetUnfolder]: For 192916/192918 co-relation queries the response was YES. [2022-07-19 21:15:58,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145112 conditions, 40113 events. 19384/40113 cut-off events. For 192916/192918 co-relation queries the response was YES. Maximal size of possible extension queue 2457. Compared 430209 event pairs, 3872 based on Foata normal form. 298/40346 useless extension candidates. Maximal degree in co-relation 145029. Up to 6733 conditions per place. [2022-07-19 21:15:58,678 INFO L132 encePairwiseOnDemand]: 100/115 looper letters, 475 selfloop transitions, 433 changer transitions 34/996 dead transitions. [2022-07-19 21:15:58,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 996 transitions, 9113 flow [2022-07-19 21:15:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-19 21:15:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-07-19 21:15:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6051 transitions. [2022-07-19 21:15:58,691 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7207861822513401 [2022-07-19 21:15:58,692 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6051 transitions. [2022-07-19 21:15:58,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6051 transitions. [2022-07-19 21:15:58,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:58,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6051 transitions. [2022-07-19 21:15:58,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 82.89041095890411) internal successors, (6051), 73 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:58,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 115.0) internal successors, (8510), 74 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:58,720 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 115.0) internal successors, (8510), 74 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:58,720 INFO L186 Difference]: Start difference. First operand has 160 places, 191 transitions, 1164 flow. Second operand 73 states and 6051 transitions. [2022-07-19 21:15:58,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 996 transitions, 9113 flow [2022-07-19 21:16:00,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 996 transitions, 8841 flow, removed 132 selfloop flow, removed 3 redundant places. [2022-07-19 21:16:00,371 INFO L242 Difference]: Finished difference. Result has 257 places, 607 transitions, 6378 flow [2022-07-19 21:16:00,372 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=6378, PETRI_PLACES=257, PETRI_TRANSITIONS=607} [2022-07-19 21:16:00,373 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 162 predicate places. [2022-07-19 21:16:00,373 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 607 transitions, 6378 flow [2022-07-19 21:16:00,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 76.16) internal successors, (1904), 25 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:00,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:00,374 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 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] [2022-07-19 21:16:00,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:16:00,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:16:00,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:16:00,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:00,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1845481669, now seen corresponding path program 1 times [2022-07-19 21:16:00,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:00,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774024676] [2022-07-19 21:16:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:00,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:00,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:00,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774024676] [2022-07-19 21:16:00,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774024676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:16:00,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199740639] [2022-07-19 21:16:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:00,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:16:00,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:16:00,718 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:16:00,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:16:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:00,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 21:16:00,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:16:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:01,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:16:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:01,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199740639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:16:01,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:16:01,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-07-19 21:16:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503310272] [2022-07-19 21:16:01,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:16:01,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 21:16:01,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 21:16:01,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-07-19 21:16:01,264 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 115 [2022-07-19 21:16:01,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 607 transitions, 6378 flow. Second operand has 30 states, 30 states have (on average 77.06666666666666) internal successors, (2312), 30 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:01,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:01,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 115 [2022-07-19 21:16:01,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:09,916 INFO L129 PetriNetUnfolder]: 19587/40364 cut-off events. [2022-07-19 21:16:09,916 INFO L130 PetriNetUnfolder]: For 498979/501380 co-relation queries the response was YES. [2022-07-19 21:16:10,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202110 conditions, 40364 events. 19587/40364 cut-off events. For 498979/501380 co-relation queries the response was YES. Maximal size of possible extension queue 2560. Compared 441461 event pairs, 2082 based on Foata normal form. 452/39592 useless extension candidates. Maximal degree in co-relation 202000. Up to 6579 conditions per place. [2022-07-19 21:16:10,798 INFO L132 encePairwiseOnDemand]: 102/115 looper letters, 421 selfloop transitions, 666 changer transitions 56/1282 dead transitions. [2022-07-19 21:16:10,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 1282 transitions, 17106 flow [2022-07-19 21:16:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 21:16:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-19 21:16:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4969 transitions. [2022-07-19 21:16:10,808 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7201449275362319 [2022-07-19 21:16:10,808 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4969 transitions. [2022-07-19 21:16:10,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4969 transitions. [2022-07-19 21:16:10,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:10,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4969 transitions. [2022-07-19 21:16:10,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 82.81666666666666) internal successors, (4969), 60 states have internal predecessors, (4969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:10,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 115.0) internal successors, (7015), 61 states have internal predecessors, (7015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:10,839 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 115.0) internal successors, (7015), 61 states have internal predecessors, (7015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:10,839 INFO L186 Difference]: Start difference. First operand has 257 places, 607 transitions, 6378 flow. Second operand 60 states and 4969 transitions. [2022-07-19 21:16:10,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 1282 transitions, 17106 flow [2022-07-19 21:16:25,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1282 transitions, 13945 flow, removed 1574 selfloop flow, removed 4 redundant places. [2022-07-19 21:16:25,559 INFO L242 Difference]: Finished difference. Result has 334 places, 912 transitions, 9795 flow [2022-07-19 21:16:25,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=5095, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9795, PETRI_PLACES=334, PETRI_TRANSITIONS=912} [2022-07-19 21:16:25,561 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 239 predicate places. [2022-07-19 21:16:25,561 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 912 transitions, 9795 flow [2022-07-19 21:16:25,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 77.06666666666666) internal successors, (2312), 30 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:25,562 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:25,562 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:25,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 21:16:25,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 21:16:25,776 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:16:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:25,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1796516230, now seen corresponding path program 1 times [2022-07-19 21:16:25,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:25,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946051078] [2022-07-19 21:16:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:25,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:16:25,793 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:16:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:16:25,824 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:16:25,827 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:16:25,827 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-19 21:16:25,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-19 21:16:25,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-19 21:16:25,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-19 21:16:25,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-19 21:16:25,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-19 21:16:25,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:16:25,828 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:16:25,829 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:16:25,829 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:16:25,855 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:16:25,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 146 places, 134 transitions, 332 flow [2022-07-19 21:16:25,865 INFO L129 PetriNetUnfolder]: 7/165 cut-off events. [2022-07-19 21:16:25,865 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:16:25,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 165 events. 7/165 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 218 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 185. Up to 10 conditions per place. [2022-07-19 21:16:25,865 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 134 transitions, 332 flow [2022-07-19 21:16:25,867 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 94 transitions, 223 flow [2022-07-19 21:16:25,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:16:25,869 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@61b2ce58, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@77b78e0b [2022-07-19 21:16:25,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 21:16:25,871 INFO L129 PetriNetUnfolder]: 3/55 cut-off events. [2022-07-19 21:16:25,871 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:16:25,872 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:25,872 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:25,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:16:25,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:25,872 INFO L85 PathProgramCache]: Analyzing trace with hash 536743157, now seen corresponding path program 1 times [2022-07-19 21:16:25,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:25,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402665738] [2022-07-19 21:16:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:25,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:25,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:25,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402665738] [2022-07-19 21:16:25,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402665738] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:16:25,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:16:25,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:16:25,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903474627] [2022-07-19 21:16:25,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:16:25,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:16:25,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:25,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:16:25,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:16:25,957 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 134 [2022-07-19 21:16:25,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 94 transitions, 223 flow. Second operand has 8 states, 8 states have (on average 90.625) internal successors, (725), 8 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:25,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:25,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 134 [2022-07-19 21:16:25,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:27,029 INFO L129 PetriNetUnfolder]: 8853/14855 cut-off events. [2022-07-19 21:16:27,029 INFO L130 PetriNetUnfolder]: For 2792/2792 co-relation queries the response was YES. [2022-07-19 21:16:27,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28395 conditions, 14855 events. 8853/14855 cut-off events. For 2792/2792 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 126078 event pairs, 921 based on Foata normal form. 271/13780 useless extension candidates. Maximal degree in co-relation 28342. Up to 5043 conditions per place. [2022-07-19 21:16:27,107 INFO L132 encePairwiseOnDemand]: 119/134 looper letters, 90 selfloop transitions, 20 changer transitions 6/177 dead transitions. [2022-07-19 21:16:27,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 177 transitions, 753 flow [2022-07-19 21:16:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:16:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:16:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1106 transitions. [2022-07-19 21:16:27,110 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7503392130257802 [2022-07-19 21:16:27,110 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1106 transitions. [2022-07-19 21:16:27,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1106 transitions. [2022-07-19 21:16:27,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:27,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1106 transitions. [2022-07-19 21:16:27,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 100.54545454545455) internal successors, (1106), 11 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:27,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:27,113 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:27,114 INFO L186 Difference]: Start difference. First operand has 103 places, 94 transitions, 223 flow. Second operand 11 states and 1106 transitions. [2022-07-19 21:16:27,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 177 transitions, 753 flow [2022-07-19 21:16:27,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 177 transitions, 704 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-07-19 21:16:27,117 INFO L242 Difference]: Finished difference. Result has 116 places, 105 transitions, 334 flow [2022-07-19 21:16:27,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=334, PETRI_PLACES=116, PETRI_TRANSITIONS=105} [2022-07-19 21:16:27,117 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 13 predicate places. [2022-07-19 21:16:27,117 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 105 transitions, 334 flow [2022-07-19 21:16:27,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 90.625) internal successors, (725), 8 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:27,118 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:27,118 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:27,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:16:27,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:16:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:27,119 INFO L85 PathProgramCache]: Analyzing trace with hash 592297315, now seen corresponding path program 1 times [2022-07-19 21:16:27,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:27,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889784805] [2022-07-19 21:16:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:27,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:27,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:27,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889784805] [2022-07-19 21:16:27,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889784805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:16:27,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:16:27,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:16:27,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30370447] [2022-07-19 21:16:27,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:16:27,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:16:27,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:27,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:16:27,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:16:27,249 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 134 [2022-07-19 21:16:27,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 105 transitions, 334 flow. Second operand has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:27,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:27,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 134 [2022-07-19 21:16:27,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:33,146 INFO L129 PetriNetUnfolder]: 44231/77184 cut-off events. [2022-07-19 21:16:33,146 INFO L130 PetriNetUnfolder]: For 59453/59453 co-relation queries the response was YES. [2022-07-19 21:16:33,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199386 conditions, 77184 events. 44231/77184 cut-off events. For 59453/59453 co-relation queries the response was YES. Maximal size of possible extension queue 3823. Compared 750244 event pairs, 6756 based on Foata normal form. 325/74157 useless extension candidates. Maximal degree in co-relation 199324. Up to 15811 conditions per place. [2022-07-19 21:16:33,927 INFO L132 encePairwiseOnDemand]: 116/134 looper letters, 282 selfloop transitions, 116 changer transitions 17/470 dead transitions. [2022-07-19 21:16:33,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 470 transitions, 2653 flow [2022-07-19 21:16:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 21:16:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-19 21:16:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3379 transitions. [2022-07-19 21:16:33,931 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7004560530679934 [2022-07-19 21:16:33,931 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3379 transitions. [2022-07-19 21:16:33,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3379 transitions. [2022-07-19 21:16:33,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:33,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3379 transitions. [2022-07-19 21:16:33,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 93.86111111111111) internal successors, (3379), 36 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:33,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 134.0) internal successors, (4958), 37 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:33,941 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 134.0) internal successors, (4958), 37 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:33,941 INFO L186 Difference]: Start difference. First operand has 116 places, 105 transitions, 334 flow. Second operand 36 states and 3379 transitions. [2022-07-19 21:16:33,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 470 transitions, 2653 flow [2022-07-19 21:16:34,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 470 transitions, 2647 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:16:34,471 INFO L242 Difference]: Finished difference. Result has 168 places, 213 transitions, 1344 flow [2022-07-19 21:16:34,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1344, PETRI_PLACES=168, PETRI_TRANSITIONS=213} [2022-07-19 21:16:34,472 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 65 predicate places. [2022-07-19 21:16:34,472 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 213 transitions, 1344 flow [2022-07-19 21:16:34,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:34,472 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:34,473 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:34,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:16:34,473 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:16:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash 800739264, now seen corresponding path program 1 times [2022-07-19 21:16:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:34,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344831403] [2022-07-19 21:16:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:34,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:34,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344831403] [2022-07-19 21:16:34,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344831403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:16:34,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014009145] [2022-07-19 21:16:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:34,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:16:34,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:16:34,550 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:16:34,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:16:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:34,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:16:34,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:16:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:34,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:16:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:34,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014009145] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:16:34,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:16:34,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-07-19 21:16:34,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060846422] [2022-07-19 21:16:34,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:16:34,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 21:16:34,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:34,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 21:16:34,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-07-19 21:16:34,911 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 134 [2022-07-19 21:16:34,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 213 transitions, 1344 flow. Second operand has 25 states, 25 states have (on average 88.16) internal successors, (2204), 25 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:34,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:34,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 134 [2022-07-19 21:16:34,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:56,256 INFO L129 PetriNetUnfolder]: 97185/173345 cut-off events. [2022-07-19 21:16:56,256 INFO L130 PetriNetUnfolder]: For 905245/905247 co-relation queries the response was YES. [2022-07-19 21:16:58,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 682527 conditions, 173345 events. 97185/173345 cut-off events. For 905245/905247 co-relation queries the response was YES. Maximal size of possible extension queue 8742. Compared 1904214 event pairs, 24048 based on Foata normal form. 981/174024 useless extension candidates. Maximal degree in co-relation 682443. Up to 38447 conditions per place. [2022-07-19 21:16:59,239 INFO L132 encePairwiseOnDemand]: 118/134 looper letters, 580 selfloop transitions, 509 changer transitions 34/1180 dead transitions. [2022-07-19 21:16:59,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1180 transitions, 10965 flow [2022-07-19 21:16:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-19 21:16:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-07-19 21:16:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 7059 transitions. [2022-07-19 21:16:59,245 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7216315681864649 [2022-07-19 21:16:59,245 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 7059 transitions. [2022-07-19 21:16:59,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 7059 transitions. [2022-07-19 21:16:59,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:59,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 7059 transitions. [2022-07-19 21:16:59,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 96.6986301369863) internal successors, (7059), 73 states have internal predecessors, (7059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:59,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 134.0) internal successors, (9916), 74 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:59,265 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 134.0) internal successors, (9916), 74 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:59,265 INFO L186 Difference]: Start difference. First operand has 168 places, 213 transitions, 1344 flow. Second operand 73 states and 7059 transitions. [2022-07-19 21:16:59,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1180 transitions, 10965 flow