./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/weaver/popl20-bad-ring-nondet.wvr.c -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 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:29:33,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:29:33,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:29:33,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:29:33,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:29:33,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:29:33,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:29:33,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:29:33,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:29:33,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:29:33,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:29:33,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:29:33,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:29:33,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:29:33,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:29:33,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:29:33,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:29:33,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:29:33,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:29:33,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:29:33,256 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:29:33,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:29:33,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:29:33,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:29:33,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:29:33,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:29:33,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:29:33,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:29:33,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:29:33,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:29:33,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:29:33,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:29:33,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:29:33,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:29:33,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:29:33,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:29:33,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:29:33,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:29:33,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:29:33,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:29:33,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:29:33,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:29:33,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:29:33,280 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:29:33,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:29:33,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:29:33,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:29:33,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:29:33,282 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:29:33,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:29:33,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:29:33,282 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:29:33,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:29:33,283 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:29:33,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:29:33,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:29:33,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:29:33,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:29:33,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:29:33,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:29:33,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:29:33,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:29:33,284 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:29:33,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:29:33,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:29:33,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:29:33,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:29:33,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:29:33,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:29:33,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:29:33,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:29:33,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:29:33,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:29:33,286 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:29:33,286 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:29:33,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:29:33,287 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d [2022-07-12 10:29:33,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:29:33,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:29:33,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:29:33,488 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:29:33,489 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:29:33,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c [2022-07-12 10:29:33,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cadc40f7/69d6fb4b593148eaa1c715fff7d7289a/FLAGeba46e988 [2022-07-12 10:29:33,861 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:29:33,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c [2022-07-12 10:29:33,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cadc40f7/69d6fb4b593148eaa1c715fff7d7289a/FLAGeba46e988 [2022-07-12 10:29:34,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cadc40f7/69d6fb4b593148eaa1c715fff7d7289a [2022-07-12 10:29:34,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:29:34,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:29:34,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:29:34,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:29:34,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:29:34,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577f8959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34, skipping insertion in model container [2022-07-12 10:29:34,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:29:34,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:29:34,476 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/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2022-07-12 10:29:34,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:29:34,486 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:29:34,506 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/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2022-07-12 10:29:34,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:29:34,518 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:29:34,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34 WrapperNode [2022-07-12 10:29:34,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:29:34,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:29:34,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:29:34,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:29:34,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,559 INFO L137 Inliner]: procedures = 25, calls = 63, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 317 [2022-07-12 10:29:34,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:29:34,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:29:34,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:29:34,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:29:34,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:29:34,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:29:34,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:29:34,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:29:34,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34" (1/1) ... [2022-07-12 10:29:34,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:29:34,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:34,616 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) [2022-07-12 10:29:34,623 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 [2022-07-12 10:29:34,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:29:34,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:29:34,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:29:34,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:29:34,651 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:29:34,651 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:29:34,651 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:29:34,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:29:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:29:34,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:29:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:29:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:29:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:29:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:29:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:29:34,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:29:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:29:34,653 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:29:34,727 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:29:34,728 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:29:35,022 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:29:35,110 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:29:35,110 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-12 10:29:35,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:29:35 BoogieIcfgContainer [2022-07-12 10:29:35,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:29:35,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:29:35,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:29:35,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:29:35,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:29:34" (1/3) ... [2022-07-12 10:29:35,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61af39f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:29:35, skipping insertion in model container [2022-07-12 10:29:35,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:34" (2/3) ... [2022-07-12 10:29:35,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61af39f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:29:35, skipping insertion in model container [2022-07-12 10:29:35,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:29:35" (3/3) ... [2022-07-12 10:29:35,117 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring-nondet.wvr.c [2022-07-12 10:29:35,120 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:29:35,126 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:29:35,126 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:29:35,126 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:29:35,189 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:29:35,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 264 places, 279 transitions, 582 flow [2022-07-12 10:29:35,323 INFO L129 PetriNetUnfolder]: 25/276 cut-off events. [2022-07-12 10:29:35,323 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:29:35,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 276 events. 25/276 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 236. Up to 4 conditions per place. [2022-07-12 10:29:35,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 279 transitions, 582 flow [2022-07-12 10:29:35,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 265 transitions, 548 flow [2022-07-12 10:29:35,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:29:35,345 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@4038f937, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@662c5e48 [2022-07-12 10:29:35,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:29:35,401 INFO L129 PetriNetUnfolder]: 25/264 cut-off events. [2022-07-12 10:29:35,402 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:29:35,402 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:35,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:35,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1266814398, now seen corresponding path program 1 times [2022-07-12 10:29:35,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:35,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816089586] [2022-07-12 10:29:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:35,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:29:35,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:35,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816089586] [2022-07-12 10:29:35,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816089586] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:35,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:35,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:29:35,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630301533] [2022-07-12 10:29:35,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:35,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:29:35,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:29:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:29:35,655 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 279 [2022-07-12 10:29:35,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 265 transitions, 548 flow. Second operand has 2 states, 2 states have (on average 253.5) internal successors, (507), 2 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:35,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:35,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 279 [2022-07-12 10:29:35,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:35,802 INFO L129 PetriNetUnfolder]: 138/578 cut-off events. [2022-07-12 10:29:35,802 INFO L130 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2022-07-12 10:29:35,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 578 events. 138/578 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2018 event pairs, 55 based on Foata normal form. 106/615 useless extension candidates. Maximal degree in co-relation 561. Up to 180 conditions per place. [2022-07-12 10:29:35,809 INFO L132 encePairwiseOnDemand]: 262/279 looper letters, 13 selfloop transitions, 0 changer transitions 8/248 dead transitions. [2022-07-12 10:29:35,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 248 transitions, 540 flow [2022-07-12 10:29:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:29:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:29:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 526 transitions. [2022-07-12 10:29:35,823 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.942652329749104 [2022-07-12 10:29:35,823 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 526 transitions. [2022-07-12 10:29:35,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 526 transitions. [2022-07-12 10:29:35,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:35,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 526 transitions. [2022-07-12 10:29:35,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 263.0) internal successors, (526), 2 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:35,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:35,837 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:35,838 INFO L186 Difference]: Start difference. First operand has 250 places, 265 transitions, 548 flow. Second operand 2 states and 526 transitions. [2022-07-12 10:29:35,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 248 transitions, 540 flow [2022-07-12 10:29:35,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 248 transitions, 528 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:29:35,847 INFO L242 Difference]: Finished difference. Result has 245 places, 240 transitions, 486 flow [2022-07-12 10:29:35,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=486, PETRI_PLACES=245, PETRI_TRANSITIONS=240} [2022-07-12 10:29:35,854 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, -5 predicate places. [2022-07-12 10:29:35,854 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 240 transitions, 486 flow [2022-07-12 10:29:35,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 253.5) internal successors, (507), 2 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:35,855 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:35,856 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:35,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:29:35,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1216024931, now seen corresponding path program 1 times [2022-07-12 10:29:35,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:35,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700083355] [2022-07-12 10:29:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:35,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:29:36,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:36,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700083355] [2022-07-12 10:29:36,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700083355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:36,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:36,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:29:36,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825307343] [2022-07-12 10:29:36,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:36,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:29:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:29:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:29:36,122 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 279 [2022-07-12 10:29:36,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 240 transitions, 486 flow. Second operand has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:36,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 279 [2022-07-12 10:29:36,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:36,207 INFO L129 PetriNetUnfolder]: 128/521 cut-off events. [2022-07-12 10:29:36,208 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-12 10:29:36,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 521 events. 128/521 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1657 event pairs, 21 based on Foata normal form. 8/484 useless extension candidates. Maximal degree in co-relation 716. Up to 133 conditions per place. [2022-07-12 10:29:36,213 INFO L132 encePairwiseOnDemand]: 274/279 looper letters, 23 selfloop transitions, 4 changer transitions 0/247 dead transitions. [2022-07-12 10:29:36,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 247 transitions, 556 flow [2022-07-12 10:29:36,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:29:36,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:29:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2022-07-12 10:29:36,216 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8972520908004779 [2022-07-12 10:29:36,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2022-07-12 10:29:36,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2022-07-12 10:29:36,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:36,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2022-07-12 10:29:36,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,220 INFO L186 Difference]: Start difference. First operand has 245 places, 240 transitions, 486 flow. Second operand 3 states and 751 transitions. [2022-07-12 10:29:36,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 247 transitions, 556 flow [2022-07-12 10:29:36,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 247 transitions, 556 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:29:36,229 INFO L242 Difference]: Finished difference. Result has 240 places, 241 transitions, 504 flow [2022-07-12 10:29:36,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=504, PETRI_PLACES=240, PETRI_TRANSITIONS=241} [2022-07-12 10:29:36,230 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, -10 predicate places. [2022-07-12 10:29:36,230 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 241 transitions, 504 flow [2022-07-12 10:29:36,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,231 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:36,231 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:36,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:29:36,232 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:36,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2020456479, now seen corresponding path program 2 times [2022-07-12 10:29:36,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143872422] [2022-07-12 10:29:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:36,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:29:36,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:36,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143872422] [2022-07-12 10:29:36,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143872422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:36,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:36,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:29:36,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967985165] [2022-07-12 10:29:36,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:36,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:29:36,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:29:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:29:36,428 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 279 [2022-07-12 10:29:36,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 241 transitions, 504 flow. Second operand has 6 states, 6 states have (on average 215.16666666666666) internal successors, (1291), 6 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:36,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 279 [2022-07-12 10:29:36,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:36,643 INFO L129 PetriNetUnfolder]: 150/749 cut-off events. [2022-07-12 10:29:36,644 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-07-12 10:29:36,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 749 events. 150/749 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2754 event pairs, 69 based on Foata normal form. 11/716 useless extension candidates. Maximal degree in co-relation 1116. Up to 220 conditions per place. [2022-07-12 10:29:36,649 INFO L132 encePairwiseOnDemand]: 268/279 looper letters, 49 selfloop transitions, 8 changer transitions 31/276 dead transitions. [2022-07-12 10:29:36,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 276 transitions, 753 flow [2022-07-12 10:29:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:29:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:29:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1970 transitions. [2022-07-12 10:29:36,654 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7845479888490641 [2022-07-12 10:29:36,654 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1970 transitions. [2022-07-12 10:29:36,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1970 transitions. [2022-07-12 10:29:36,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:36,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1970 transitions. [2022-07-12 10:29:36,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 218.88888888888889) internal successors, (1970), 9 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 279.0) internal successors, (2790), 10 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,662 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 279.0) internal successors, (2790), 10 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,662 INFO L186 Difference]: Start difference. First operand has 240 places, 241 transitions, 504 flow. Second operand 9 states and 1970 transitions. [2022-07-12 10:29:36,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 276 transitions, 753 flow [2022-07-12 10:29:36,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 276 transitions, 749 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:29:36,666 INFO L242 Difference]: Finished difference. Result has 249 places, 242 transitions, 530 flow [2022-07-12 10:29:36,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=530, PETRI_PLACES=249, PETRI_TRANSITIONS=242} [2022-07-12 10:29:36,668 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, -1 predicate places. [2022-07-12 10:29:36,668 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 242 transitions, 530 flow [2022-07-12 10:29:36,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 215.16666666666666) internal successors, (1291), 6 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,669 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:36,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:36,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:29:36,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:36,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1682521090, now seen corresponding path program 1 times [2022-07-12 10:29:36,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:36,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619450455] [2022-07-12 10:29:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:36,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:36,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:36,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619450455] [2022-07-12 10:29:36,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619450455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:36,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:36,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:29:36,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411596030] [2022-07-12 10:29:36,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:36,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:29:36,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:36,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:29:36,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:29:36,759 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 279 [2022-07-12 10:29:36,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 242 transitions, 530 flow. Second operand has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:36,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 279 [2022-07-12 10:29:36,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:36,927 INFO L129 PetriNetUnfolder]: 233/1013 cut-off events. [2022-07-12 10:29:36,928 INFO L130 PetriNetUnfolder]: For 145/145 co-relation queries the response was YES. [2022-07-12 10:29:36,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 1013 events. 233/1013 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5154 event pairs, 61 based on Foata normal form. 1/882 useless extension candidates. Maximal degree in co-relation 1557. Up to 202 conditions per place. [2022-07-12 10:29:36,933 INFO L132 encePairwiseOnDemand]: 274/279 looper letters, 55 selfloop transitions, 2 changer transitions 7/258 dead transitions. [2022-07-12 10:29:36,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 258 transitions, 705 flow [2022-07-12 10:29:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:29:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:29:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1093 transitions. [2022-07-12 10:29:36,935 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7835125448028674 [2022-07-12 10:29:36,935 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1093 transitions. [2022-07-12 10:29:36,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1093 transitions. [2022-07-12 10:29:36,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:36,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1093 transitions. [2022-07-12 10:29:36,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 218.6) internal successors, (1093), 5 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,941 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,941 INFO L186 Difference]: Start difference. First operand has 249 places, 242 transitions, 530 flow. Second operand 5 states and 1093 transitions. [2022-07-12 10:29:36,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 258 transitions, 705 flow [2022-07-12 10:29:36,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 258 transitions, 691 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-12 10:29:36,945 INFO L242 Difference]: Finished difference. Result has 249 places, 243 transitions, 532 flow [2022-07-12 10:29:36,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=532, PETRI_PLACES=249, PETRI_TRANSITIONS=243} [2022-07-12 10:29:36,946 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, -1 predicate places. [2022-07-12 10:29:36,946 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 243 transitions, 532 flow [2022-07-12 10:29:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,947 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:36,947 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:36,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:29:36,947 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:36,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1253087101, now seen corresponding path program 1 times [2022-07-12 10:29:36,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:36,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179522190] [2022-07-12 10:29:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:36,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:36,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:36,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179522190] [2022-07-12 10:29:36,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179522190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:36,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:36,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:29:36,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344145329] [2022-07-12 10:29:36,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:36,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:29:36,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:36,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:29:36,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:29:36,996 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 279 [2022-07-12 10:29:36,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 243 transitions, 532 flow. Second operand has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:36,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:36,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 279 [2022-07-12 10:29:36,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:37,141 INFO L129 PetriNetUnfolder]: 346/1348 cut-off events. [2022-07-12 10:29:37,141 INFO L130 PetriNetUnfolder]: For 213/213 co-relation queries the response was YES. [2022-07-12 10:29:37,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2185 conditions, 1348 events. 346/1348 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 7493 event pairs, 140 based on Foata normal form. 0/1184 useless extension candidates. Maximal degree in co-relation 2175. Up to 341 conditions per place. [2022-07-12 10:29:37,149 INFO L132 encePairwiseOnDemand]: 276/279 looper letters, 27 selfloop transitions, 2 changer transitions 0/251 dead transitions. [2022-07-12 10:29:37,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 251 transitions, 616 flow [2022-07-12 10:29:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:29:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:29:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 753 transitions. [2022-07-12 10:29:37,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.899641577060932 [2022-07-12 10:29:37,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 753 transitions. [2022-07-12 10:29:37,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 753 transitions. [2022-07-12 10:29:37,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:37,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 753 transitions. [2022-07-12 10:29:37,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:37,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:37,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:37,154 INFO L186 Difference]: Start difference. First operand has 249 places, 243 transitions, 532 flow. Second operand 3 states and 753 transitions. [2022-07-12 10:29:37,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 251 transitions, 616 flow [2022-07-12 10:29:37,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 251 transitions, 610 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-12 10:29:37,158 INFO L242 Difference]: Finished difference. Result has 248 places, 244 transitions, 540 flow [2022-07-12 10:29:37,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=540, PETRI_PLACES=248, PETRI_TRANSITIONS=244} [2022-07-12 10:29:37,159 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, -2 predicate places. [2022-07-12 10:29:37,159 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 244 transitions, 540 flow [2022-07-12 10:29:37,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:37,160 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:37,160 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:37,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:29:37,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1810741769, now seen corresponding path program 1 times [2022-07-12 10:29:37,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:37,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663921048] [2022-07-12 10:29:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:37,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:37,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:37,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663921048] [2022-07-12 10:29:37,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663921048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:37,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088651663] [2022-07-12 10:29:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:37,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:37,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:37,225 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) [2022-07-12 10:29:37,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:29:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:37,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:29:37,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:29:37,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-07-12 10:29:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:37,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:29:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:37,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088651663] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:29:37,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:29:37,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-07-12 10:29:37,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210454621] [2022-07-12 10:29:37,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:29:37,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:29:37,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:29:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:29:37,484 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 279 [2022-07-12 10:29:37,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 244 transitions, 540 flow. Second operand has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:37,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:37,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 279 [2022-07-12 10:29:37,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:38,130 INFO L129 PetriNetUnfolder]: 2082/4841 cut-off events. [2022-07-12 10:29:38,131 INFO L130 PetriNetUnfolder]: For 1365/1365 co-relation queries the response was YES. [2022-07-12 10:29:38,141 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9534 conditions, 4841 events. 2082/4841 cut-off events. For 1365/1365 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 36156 event pairs, 515 based on Foata normal form. 0/4449 useless extension candidates. Maximal degree in co-relation 9525. Up to 1466 conditions per place. [2022-07-12 10:29:38,157 INFO L132 encePairwiseOnDemand]: 272/279 looper letters, 79 selfloop transitions, 16 changer transitions 0/303 dead transitions. [2022-07-12 10:29:38,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 303 transitions, 902 flow [2022-07-12 10:29:38,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:29:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:29:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1678 transitions. [2022-07-12 10:29:38,160 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8591909882232462 [2022-07-12 10:29:38,160 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1678 transitions. [2022-07-12 10:29:38,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1678 transitions. [2022-07-12 10:29:38,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:38,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1678 transitions. [2022-07-12 10:29:38,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 239.71428571428572) internal successors, (1678), 7 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:38,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 279.0) internal successors, (2232), 8 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:38,166 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 279.0) internal successors, (2232), 8 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:38,166 INFO L186 Difference]: Start difference. First operand has 248 places, 244 transitions, 540 flow. Second operand 7 states and 1678 transitions. [2022-07-12 10:29:38,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 303 transitions, 902 flow [2022-07-12 10:29:38,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 303 transitions, 898 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:29:38,172 INFO L242 Difference]: Finished difference. Result has 256 places, 259 transitions, 641 flow [2022-07-12 10:29:38,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=641, PETRI_PLACES=256, PETRI_TRANSITIONS=259} [2022-07-12 10:29:38,173 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, 6 predicate places. [2022-07-12 10:29:38,173 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 259 transitions, 641 flow [2022-07-12 10:29:38,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:38,174 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:38,174 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:38,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:29:38,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-12 10:29:38,400 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:38,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1001814767, now seen corresponding path program 2 times [2022-07-12 10:29:38,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:38,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221273470] [2022-07-12 10:29:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:38,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:38,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:38,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221273470] [2022-07-12 10:29:38,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221273470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:38,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705178538] [2022-07-12 10:29:38,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:29:38,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:38,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:38,542 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) [2022-07-12 10:29:38,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:29:38,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:29:38,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:29:38,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:29:38,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:29:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 10:29:38,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:29:38,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705178538] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:38,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:29:38,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-07-12 10:29:38,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925261] [2022-07-12 10:29:38,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:38,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:29:38,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:38,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:29:38,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:29:38,946 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 279 [2022-07-12 10:29:38,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 259 transitions, 641 flow. Second operand has 6 states, 6 states have (on average 217.16666666666666) internal successors, (1303), 6 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:38,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:38,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 279 [2022-07-12 10:29:38,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:39,447 INFO L129 PetriNetUnfolder]: 668/3003 cut-off events. [2022-07-12 10:29:39,447 INFO L130 PetriNetUnfolder]: For 752/757 co-relation queries the response was YES. [2022-07-12 10:29:39,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5515 conditions, 3003 events. 668/3003 cut-off events. For 752/757 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 25023 event pairs, 261 based on Foata normal form. 46/2717 useless extension candidates. Maximal degree in co-relation 5503. Up to 627 conditions per place. [2022-07-12 10:29:39,462 INFO L132 encePairwiseOnDemand]: 270/279 looper letters, 52 selfloop transitions, 6 changer transitions 12/275 dead transitions. [2022-07-12 10:29:39,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 275 transitions, 830 flow [2022-07-12 10:29:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:29:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:29:39,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1538 transitions. [2022-07-12 10:29:39,465 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7875064004096262 [2022-07-12 10:29:39,465 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1538 transitions. [2022-07-12 10:29:39,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1538 transitions. [2022-07-12 10:29:39,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:39,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1538 transitions. [2022-07-12 10:29:39,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 219.71428571428572) internal successors, (1538), 7 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:39,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 279.0) internal successors, (2232), 8 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:39,471 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 279.0) internal successors, (2232), 8 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:39,471 INFO L186 Difference]: Start difference. First operand has 256 places, 259 transitions, 641 flow. Second operand 7 states and 1538 transitions. [2022-07-12 10:29:39,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 275 transitions, 830 flow [2022-07-12 10:29:39,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 275 transitions, 830 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:29:39,480 INFO L242 Difference]: Finished difference. Result has 264 places, 260 transitions, 665 flow [2022-07-12 10:29:39,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=264, PETRI_TRANSITIONS=260} [2022-07-12 10:29:39,481 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, 14 predicate places. [2022-07-12 10:29:39,481 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 260 transitions, 665 flow [2022-07-12 10:29:39,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 217.16666666666666) internal successors, (1303), 6 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:39,482 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:39,482 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:39,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:29:39,700 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,SelfDestructingSolverStorable6 [2022-07-12 10:29:39,702 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:39,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1841769227, now seen corresponding path program 1 times [2022-07-12 10:29:39,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:39,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037179256] [2022-07-12 10:29:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:39,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:29:39,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:39,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037179256] [2022-07-12 10:29:39,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037179256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:39,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103080941] [2022-07-12 10:29:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:39,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:39,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:39,895 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) [2022-07-12 10:29:39,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:29:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:40,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:29:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:29:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 10:29:40,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:29:40,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103080941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:40,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:29:40,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-07-12 10:29:40,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678731135] [2022-07-12 10:29:40,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:40,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:29:40,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:29:40,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:29:40,200 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 279 [2022-07-12 10:29:40,201 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 260 transitions, 665 flow. Second operand has 6 states, 6 states have (on average 217.83333333333334) internal successors, (1307), 6 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:40,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:40,201 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 279 [2022-07-12 10:29:40,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:40,603 INFO L129 PetriNetUnfolder]: 611/2854 cut-off events. [2022-07-12 10:29:40,604 INFO L130 PetriNetUnfolder]: For 819/842 co-relation queries the response was YES. [2022-07-12 10:29:40,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5272 conditions, 2854 events. 611/2854 cut-off events. For 819/842 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 23051 event pairs, 240 based on Foata normal form. 37/2584 useless extension candidates. Maximal degree in co-relation 5257. Up to 650 conditions per place. [2022-07-12 10:29:40,621 INFO L132 encePairwiseOnDemand]: 269/279 looper letters, 51 selfloop transitions, 8 changer transitions 23/287 dead transitions. [2022-07-12 10:29:40,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 287 transitions, 913 flow [2022-07-12 10:29:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:29:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:29:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1967 transitions. [2022-07-12 10:29:40,624 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7833532457188371 [2022-07-12 10:29:40,624 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1967 transitions. [2022-07-12 10:29:40,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1967 transitions. [2022-07-12 10:29:40,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:40,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1967 transitions. [2022-07-12 10:29:40,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 218.55555555555554) internal successors, (1967), 9 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:40,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 279.0) internal successors, (2790), 10 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:40,631 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 279.0) internal successors, (2790), 10 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:40,632 INFO L186 Difference]: Start difference. First operand has 264 places, 260 transitions, 665 flow. Second operand 9 states and 1967 transitions. [2022-07-12 10:29:40,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 287 transitions, 913 flow [2022-07-12 10:29:40,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 287 transitions, 897 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:29:40,639 INFO L242 Difference]: Finished difference. Result has 269 places, 261 transitions, 683 flow [2022-07-12 10:29:40,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=683, PETRI_PLACES=269, PETRI_TRANSITIONS=261} [2022-07-12 10:29:40,642 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, 19 predicate places. [2022-07-12 10:29:40,642 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 261 transitions, 683 flow [2022-07-12 10:29:40,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 217.83333333333334) internal successors, (1307), 6 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:40,642 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:40,643 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:40,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:29:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:40,860 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:40,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash -447199656, now seen corresponding path program 1 times [2022-07-12 10:29:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:40,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072231243] [2022-07-12 10:29:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:40,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:29:41,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:41,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072231243] [2022-07-12 10:29:41,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072231243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526288665] [2022-07-12 10:29:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:41,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:41,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:41,012 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:29:41,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:29:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:41,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:29:41,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:29:41,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-07-12 10:29:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 10:29:41,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:29:41,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2022-07-12 10:29:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 10:29:41,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526288665] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:29:41,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:29:41,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-07-12 10:29:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192628083] [2022-07-12 10:29:41,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:29:41,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 10:29:41,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:41,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 10:29:41,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-07-12 10:29:41,932 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 279 [2022-07-12 10:29:41,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 261 transitions, 683 flow. Second operand has 28 states, 28 states have (on average 167.35714285714286) internal successors, (4686), 28 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:41,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:41,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 279 [2022-07-12 10:29:41,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:45,207 INFO L129 PetriNetUnfolder]: 5177/13382 cut-off events. [2022-07-12 10:29:45,207 INFO L130 PetriNetUnfolder]: For 8660/8720 co-relation queries the response was YES. [2022-07-12 10:29:45,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30311 conditions, 13382 events. 5177/13382 cut-off events. For 8660/8720 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 131589 event pairs, 969 based on Foata normal form. 785/13197 useless extension candidates. Maximal degree in co-relation 30294. Up to 1566 conditions per place. [2022-07-12 10:29:45,366 INFO L132 encePairwiseOnDemand]: 234/279 looper letters, 216 selfloop transitions, 116 changer transitions 122/598 dead transitions. [2022-07-12 10:29:45,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 598 transitions, 2947 flow [2022-07-12 10:29:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 10:29:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-12 10:29:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 10488 transitions. [2022-07-12 10:29:45,382 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5966888547533709 [2022-07-12 10:29:45,382 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 10488 transitions. [2022-07-12 10:29:45,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 10488 transitions. [2022-07-12 10:29:45,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:45,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 10488 transitions. [2022-07-12 10:29:45,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 166.47619047619048) internal successors, (10488), 63 states have internal predecessors, (10488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:45,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 279.0) internal successors, (17856), 64 states have internal predecessors, (17856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:45,437 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 279.0) internal successors, (17856), 64 states have internal predecessors, (17856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:45,437 INFO L186 Difference]: Start difference. First operand has 269 places, 261 transitions, 683 flow. Second operand 63 states and 10488 transitions. [2022-07-12 10:29:45,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 598 transitions, 2947 flow [2022-07-12 10:29:45,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 598 transitions, 2891 flow, removed 15 selfloop flow, removed 6 redundant places. [2022-07-12 10:29:45,466 INFO L242 Difference]: Finished difference. Result has 337 places, 335 transitions, 1314 flow [2022-07-12 10:29:45,466 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1314, PETRI_PLACES=337, PETRI_TRANSITIONS=335} [2022-07-12 10:29:45,467 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, 87 predicate places. [2022-07-12 10:29:45,467 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 335 transitions, 1314 flow [2022-07-12 10:29:45,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 167.35714285714286) internal successors, (4686), 28 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:45,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:45,469 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:45,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 10:29:45,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:45,684 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1714450926, now seen corresponding path program 2 times [2022-07-12 10:29:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:45,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324239126] [2022-07-12 10:29:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:45,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:29:45,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:45,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324239126] [2022-07-12 10:29:45,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324239126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:45,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456307062] [2022-07-12 10:29:45,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:29:45,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:45,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:45,827 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:29:45,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:29:45,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:29:45,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:29:45,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:29:45,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:29:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 10:29:46,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:29:46,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456307062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:46,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:29:46,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2022-07-12 10:29:46,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011665412] [2022-07-12 10:29:46,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:46,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:29:46,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:46,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:29:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:29:46,059 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 279 [2022-07-12 10:29:46,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 335 transitions, 1314 flow. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:46,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:46,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 279 [2022-07-12 10:29:46,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:46,672 INFO L129 PetriNetUnfolder]: 1089/5443 cut-off events. [2022-07-12 10:29:46,672 INFO L130 PetriNetUnfolder]: For 5131/5191 co-relation queries the response was YES. [2022-07-12 10:29:46,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11326 conditions, 5443 events. 1089/5443 cut-off events. For 5131/5191 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 52724 event pairs, 354 based on Foata normal form. 84/5014 useless extension candidates. Maximal degree in co-relation 11296. Up to 1527 conditions per place. [2022-07-12 10:29:46,705 INFO L132 encePairwiseOnDemand]: 275/279 looper letters, 42 selfloop transitions, 4 changer transitions 1/341 dead transitions. [2022-07-12 10:29:46,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 341 transitions, 1436 flow [2022-07-12 10:29:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:29:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:29:46,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 753 transitions. [2022-07-12 10:29:46,706 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.899641577060932 [2022-07-12 10:29:46,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 753 transitions. [2022-07-12 10:29:46,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 753 transitions. [2022-07-12 10:29:46,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:46,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 753 transitions. [2022-07-12 10:29:46,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:46,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:46,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:46,709 INFO L186 Difference]: Start difference. First operand has 337 places, 335 transitions, 1314 flow. Second operand 3 states and 753 transitions. [2022-07-12 10:29:46,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 341 transitions, 1436 flow [2022-07-12 10:29:46,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 341 transitions, 1347 flow, removed 17 selfloop flow, removed 19 redundant places. [2022-07-12 10:29:46,724 INFO L242 Difference]: Finished difference. Result has 319 places, 333 transitions, 1238 flow [2022-07-12 10:29:46,725 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1238, PETRI_PLACES=319, PETRI_TRANSITIONS=333} [2022-07-12 10:29:46,726 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, 69 predicate places. [2022-07-12 10:29:46,726 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 333 transitions, 1238 flow [2022-07-12 10:29:46,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:46,726 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:46,726 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:46,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:29:46,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 10:29:46,940 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:29:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:46,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1804681364, now seen corresponding path program 3 times [2022-07-12 10:29:46,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:46,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611065601] [2022-07-12 10:29:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:46,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:29:47,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:47,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611065601] [2022-07-12 10:29:47,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611065601] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:47,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773048685] [2022-07-12 10:29:47,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:29:47,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:47,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:47,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:29:47,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:29:47,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:29:47,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:29:47,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:29:47,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:29:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 10:29:47,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:29:47,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2022-07-12 10:29:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 10:29:48,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773048685] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:29:48,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:29:48,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2022-07-12 10:29:48,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133552179] [2022-07-12 10:29:48,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:29:48,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 10:29:48,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:48,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 10:29:48,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:29:48,165 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 279 [2022-07-12 10:29:48,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 333 transitions, 1238 flow. Second operand has 30 states, 30 states have (on average 165.06666666666666) internal successors, (4952), 30 states have internal predecessors, (4952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:48,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:48,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 279 [2022-07-12 10:29:48,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:50,862 INFO L129 PetriNetUnfolder]: 1904/6352 cut-off events. [2022-07-12 10:29:50,862 INFO L130 PetriNetUnfolder]: For 5930/6026 co-relation queries the response was YES. [2022-07-12 10:29:50,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14190 conditions, 6352 events. 1904/6352 cut-off events. For 5930/6026 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 55970 event pairs, 577 based on Foata normal form. 227/6014 useless extension candidates. Maximal degree in co-relation 14164. Up to 928 conditions per place. [2022-07-12 10:29:50,915 INFO L132 encePairwiseOnDemand]: 234/279 looper letters, 0 selfloop transitions, 0 changer transitions 449/449 dead transitions. [2022-07-12 10:29:50,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 449 transitions, 2334 flow [2022-07-12 10:29:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 10:29:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-12 10:29:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 9601 transitions. [2022-07-12 10:29:50,925 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5832573962699714 [2022-07-12 10:29:50,925 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 9601 transitions. [2022-07-12 10:29:50,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 9601 transitions. [2022-07-12 10:29:50,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:50,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 9601 transitions. [2022-07-12 10:29:50,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 162.72881355932202) internal successors, (9601), 59 states have internal predecessors, (9601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:50,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 279.0) internal successors, (16740), 60 states have internal predecessors, (16740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:50,975 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 279.0) internal successors, (16740), 60 states have internal predecessors, (16740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:50,975 INFO L186 Difference]: Start difference. First operand has 319 places, 333 transitions, 1238 flow. Second operand 59 states and 9601 transitions. [2022-07-12 10:29:50,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 449 transitions, 2334 flow [2022-07-12 10:29:50,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 449 transitions, 2320 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-07-12 10:29:50,988 INFO L242 Difference]: Finished difference. Result has 357 places, 0 transitions, 0 flow [2022-07-12 10:29:50,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=0, PETRI_PLACES=357, PETRI_TRANSITIONS=0} [2022-07-12 10:29:50,989 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, 107 predicate places. [2022-07-12 10:29:50,989 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 0 transitions, 0 flow [2022-07-12 10:29:50,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 165.06666666666666) internal successors, (4952), 30 states have internal predecessors, (4952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:29:50,992 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-07-12 10:29:50,992 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-07-12 10:29:50,992 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-12 10:29:50,992 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-07-12 10:29:51,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:29:51,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:51,212 INFO L356 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1] [2022-07-12 10:29:51,214 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-12 10:29:51,214 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 10:29:51,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 10:29:51 BasicIcfg [2022-07-12 10:29:51,218 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 10:29:51,218 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 10:29:51,218 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 10:29:51,218 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 10:29:51,218 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:29:35" (3/4) ... [2022-07-12 10:29:51,220 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-12 10:29:51,223 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-07-12 10:29:51,223 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-07-12 10:29:51,224 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2022-07-12 10:29:51,227 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 32 nodes and edges [2022-07-12 10:29:51,243 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-12 10:29:51,243 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-12 10:29:51,244 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-12 10:29:51,283 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 10:29:51,283 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 10:29:51,285 INFO L158 Benchmark]: Toolchain (without parser) took 16965.81ms. Allocated memory was 100.7MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 66.1MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 441.7MB. Max. memory is 16.1GB. [2022-07-12 10:29:51,285 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory was 52.3MB in the beginning and 52.2MB in the end (delta: 25.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 10:29:51,286 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.75ms. Allocated memory is still 100.7MB. Free memory was 66.0MB in the beginning and 74.7MB in the end (delta: -8.7MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2022-07-12 10:29:51,286 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.47ms. Allocated memory is still 100.7MB. Free memory was 74.7MB in the beginning and 72.1MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-12 10:29:51,286 INFO L158 Benchmark]: Boogie Preprocessor took 24.32ms. Allocated memory is still 100.7MB. Free memory was 72.1MB in the beginning and 70.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 10:29:51,287 INFO L158 Benchmark]: RCFGBuilder took 524.41ms. Allocated memory is still 100.7MB. Free memory was 70.1MB in the beginning and 76.4MB in the end (delta: -6.3MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-07-12 10:29:51,287 INFO L158 Benchmark]: TraceAbstraction took 16104.68ms. Allocated memory was 100.7MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 75.9MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 851.4MB. Max. memory is 16.1GB. [2022-07-12 10:29:51,287 INFO L158 Benchmark]: Witness Printer took 65.53ms. Allocated memory is still 1.7GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-12 10:29:51,289 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory was 52.3MB in the beginning and 52.2MB in the end (delta: 25.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 198.75ms. Allocated memory is still 100.7MB. Free memory was 66.0MB in the beginning and 74.7MB in the end (delta: -8.7MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.47ms. Allocated memory is still 100.7MB. Free memory was 74.7MB in the beginning and 72.1MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.32ms. Allocated memory is still 100.7MB. Free memory was 72.1MB in the beginning and 70.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 524.41ms. Allocated memory is still 100.7MB. Free memory was 70.1MB in the beginning and 76.4MB in the end (delta: -6.3MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * TraceAbstraction took 16104.68ms. Allocated memory was 100.7MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 75.9MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 851.4MB. Max. memory is 16.1GB. * Witness Printer took 65.53ms. Allocated memory is still 1.7GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 156]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 301 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.0s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 9.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2180 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2180 mSDsluCounter, 2057 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2471 mSDsCounter, 291 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4113 IncrementalHoareTripleChecker+Invalid, 4404 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 291 mSolverCounterUnsat, 281 mSDtfsCounter, 4113 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2364 GetRequests, 2130 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1314occurred in iteration=9, InterpolantAutomatonStates: 170, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 3884 NumberOfCodeBlocks, 3807 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 4585 ConstructedInterpolants, 0 QuantifiedInterpolants, 14473 SizeOfPredicates, 60 NumberOfNonLiveVariables, 3149 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 180/216 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-12 10:29:51,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE