./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i --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/goblint-regression/28-race_reach_42-trylock2_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:17:01,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:17:01,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:17:01,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:17:01,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:17:01,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:17:01,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:17:01,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:17:01,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:17:01,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:17:01,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:17:01,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:17:01,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:17:01,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:17:01,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:17:01,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:17:01,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:17:01,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:17:01,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:17:01,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:17:01,259 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:17:01,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:17:01,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:17:01,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:17:01,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:17:01,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:17:01,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:17:01,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:17:01,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:17:01,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:17:01,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:17:01,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:17:01,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:17:01,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:17:01,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:17:01,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:17:01,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:17:01,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:17:01,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:17:01,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:17:01,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:17:01,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:17:01,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:17:01,284 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:17:01,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:17:01,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:17:01,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:17:01,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:17:01,286 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:17:01,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:17:01,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:17:01,287 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:17:01,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:17:01,287 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:17:01,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:17:01,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:17:01,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:17:01,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:17:01,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:17:01,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:17:01,288 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:17:01,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:17:01,288 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:17:01,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:17:01,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:17:01,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:17:01,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:17:01,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:17:01,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:17:01,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:17:01,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:17:01,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:17:01,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:17:01,290 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:17:01,290 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:17:01,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:17:01,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 [2022-07-12 10:17:01,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:17:01,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:17:01,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:17:01,488 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:17:01,489 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:17:01,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2022-07-12 10:17:01,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b7ddc93/ed8593bb87124b0cb500c2e2dc0152ae/FLAG993d26164 [2022-07-12 10:17:01,900 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:17:01,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2022-07-12 10:17:01,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b7ddc93/ed8593bb87124b0cb500c2e2dc0152ae/FLAG993d26164 [2022-07-12 10:17:02,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b7ddc93/ed8593bb87124b0cb500c2e2dc0152ae [2022-07-12 10:17:02,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:17:02,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:17:02,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:17:02,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:17:02,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:17:02,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@512bce40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02, skipping insertion in model container [2022-07-12 10:17:02,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:17:02,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:17:02,539 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/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2022-07-12 10:17:02,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:17:02,561 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:17:02,582 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/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2022-07-12 10:17:02,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:17:02,611 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:17:02,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02 WrapperNode [2022-07-12 10:17:02,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:17:02,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:17:02,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:17:02,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:17:02,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,642 INFO L137 Inliner]: procedures = 171, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 130 [2022-07-12 10:17:02,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:17:02,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:17:02,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:17:02,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:17:02,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:17:02,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:17:02,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:17:02,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:17:02,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02" (1/1) ... [2022-07-12 10:17:02,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:17:02,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:02,697 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 10:17:02,727 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 10:17:02,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:17:02,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:17:02,759 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:17:02,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:17:02,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:17:02,759 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:17:02,760 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:17:02,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:17:02,761 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-07-12 10:17:02,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:17:02,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:17:02,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:17:02,762 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 10:17:02,892 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:17:02,894 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:17:03,090 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:17:03,096 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:17:03,096 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2022-07-12 10:17:03,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:17:03 BoogieIcfgContainer [2022-07-12 10:17:03,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:17:03,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:17:03,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:17:03,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:17:03,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:17:02" (1/3) ... [2022-07-12 10:17:03,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df584ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:17:03, skipping insertion in model container [2022-07-12 10:17:03,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:02" (2/3) ... [2022-07-12 10:17:03,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df584ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:17:03, skipping insertion in model container [2022-07-12 10:17:03,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:17:03" (3/3) ... [2022-07-12 10:17:03,115 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2022-07-12 10:17:03,118 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:17:03,133 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:17:03,134 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-12 10:17:03,134 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:17:03,176 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:17:03,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 170 places, 196 transitions, 400 flow [2022-07-12 10:17:03,257 INFO L129 PetriNetUnfolder]: 45/290 cut-off events. [2022-07-12 10:17:03,257 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:17:03,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 290 events. 45/290 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1129 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 152. Up to 6 conditions per place. [2022-07-12 10:17:03,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 196 transitions, 400 flow [2022-07-12 10:17:03,271 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 191 transitions, 387 flow [2022-07-12 10:17:03,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:03,283 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@7dcda47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47b2580c [2022-07-12 10:17:03,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:17:03,296 INFO L129 PetriNetUnfolder]: 8/105 cut-off events. [2022-07-12 10:17:03,298 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:03,298 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:03,299 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] [2022-07-12 10:17:03,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:03,303 INFO L85 PathProgramCache]: Analyzing trace with hash -892218331, now seen corresponding path program 1 times [2022-07-12 10:17:03,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:03,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385643955] [2022-07-12 10:17:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:03,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:03,479 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 10:17:03,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:03,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385643955] [2022-07-12 10:17:03,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385643955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:03,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:03,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:03,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573964557] [2022-07-12 10:17:03,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:03,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:03,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:03,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:03,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:03,524 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 196 [2022-07-12 10:17:03,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 191 transitions, 387 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 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 10:17:03,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:03,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 196 [2022-07-12 10:17:03,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:03,579 INFO L129 PetriNetUnfolder]: 1/164 cut-off events. [2022-07-12 10:17:03,580 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:03,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 164 events. 1/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 147 event pairs, 0 based on Foata normal form. 44/201 useless extension candidates. Maximal degree in co-relation 126. Up to 6 conditions per place. [2022-07-12 10:17:03,583 INFO L132 encePairwiseOnDemand]: 166/196 looper letters, 8 selfloop transitions, 2 changer transitions 15/162 dead transitions. [2022-07-12 10:17:03,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 162 transitions, 349 flow [2022-07-12 10:17:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2022-07-12 10:17:03,596 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8826530612244898 [2022-07-12 10:17:03,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2022-07-12 10:17:03,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2022-07-12 10:17:03,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:03,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2022-07-12 10:17:03,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 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 10:17:03,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 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 10:17:03,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 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 10:17:03,618 INFO L186 Difference]: Start difference. First operand has 166 places, 191 transitions, 387 flow. Second operand 3 states and 519 transitions. [2022-07-12 10:17:03,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 162 transitions, 349 flow [2022-07-12 10:17:03,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 162 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:03,625 INFO L242 Difference]: Finished difference. Result has 165 places, 145 transitions, 303 flow [2022-07-12 10:17:03,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=303, PETRI_PLACES=165, PETRI_TRANSITIONS=145} [2022-07-12 10:17:03,635 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, -1 predicate places. [2022-07-12 10:17:03,636 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 145 transitions, 303 flow [2022-07-12 10:17:03,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 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 10:17:03,636 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:03,637 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:03,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:17:03,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:03,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:03,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1885180906, now seen corresponding path program 1 times [2022-07-12 10:17:03,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:03,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518693546] [2022-07-12 10:17:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:03,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:03,678 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:03,717 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:03,718 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:03,719 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:17:03,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:17:03,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-12 10:17:03,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:17:03,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:17:03,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:17:03,721 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:17:03,723 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:03,723 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:17:03,744 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:17:03,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 214 places, 251 transitions, 520 flow [2022-07-12 10:17:03,790 INFO L129 PetriNetUnfolder]: 76/464 cut-off events. [2022-07-12 10:17:03,790 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:17:03,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 464 events. 76/464 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2049 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 292. Up to 9 conditions per place. [2022-07-12 10:17:03,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 251 transitions, 520 flow [2022-07-12 10:17:03,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 251 transitions, 520 flow [2022-07-12 10:17:03,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:03,807 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@7dcda47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47b2580c [2022-07-12 10:17:03,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:17:03,814 INFO L129 PetriNetUnfolder]: 8/109 cut-off events. [2022-07-12 10:17:03,815 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:03,815 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:03,815 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] [2022-07-12 10:17:03,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:03,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1906173221, now seen corresponding path program 1 times [2022-07-12 10:17:03,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:03,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004657955] [2022-07-12 10:17:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:03,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:03,852 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 10:17:03,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:03,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004657955] [2022-07-12 10:17:03,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004657955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:03,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:03,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:03,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119513197] [2022-07-12 10:17:03,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:03,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:03,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:03,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:03,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:03,856 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 251 [2022-07-12 10:17:03,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 251 transitions, 520 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 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 10:17:03,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:03,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 251 [2022-07-12 10:17:03,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:03,919 INFO L129 PetriNetUnfolder]: 4/320 cut-off events. [2022-07-12 10:17:03,919 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-12 10:17:03,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 320 events. 4/320 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 779 event pairs, 0 based on Foata normal form. 128/432 useless extension candidates. Maximal degree in co-relation 226. Up to 16 conditions per place. [2022-07-12 10:17:03,921 INFO L132 encePairwiseOnDemand]: 209/251 looper letters, 11 selfloop transitions, 2 changer transitions 21/212 dead transitions. [2022-07-12 10:17:03,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 212 transitions, 472 flow [2022-07-12 10:17:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2022-07-12 10:17:03,925 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8751660026560425 [2022-07-12 10:17:03,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2022-07-12 10:17:03,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2022-07-12 10:17:03,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:03,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2022-07-12 10:17:03,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 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 10:17:03,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 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 10:17:03,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 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 10:17:03,930 INFO L186 Difference]: Start difference. First operand has 214 places, 251 transitions, 520 flow. Second operand 3 states and 659 transitions. [2022-07-12 10:17:03,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 212 transitions, 472 flow [2022-07-12 10:17:03,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 212 transitions, 472 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:03,937 INFO L242 Difference]: Finished difference. Result has 213 places, 188 transitions, 398 flow [2022-07-12 10:17:03,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=213, PETRI_TRANSITIONS=188} [2022-07-12 10:17:03,937 INFO L279 CegarLoopForPetriNet]: 214 programPoint places, -1 predicate places. [2022-07-12 10:17:03,938 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 188 transitions, 398 flow [2022-07-12 10:17:03,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 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 10:17:03,938 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:03,938 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] [2022-07-12 10:17:03,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:17:03,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1025915671, now seen corresponding path program 1 times [2022-07-12 10:17:03,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:03,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987835354] [2022-07-12 10:17:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:03,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:04,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:04,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987835354] [2022-07-12 10:17:04,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987835354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:04,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976157908] [2022-07-12 10:17:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:04,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:04,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:04,064 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 10:17:04,104 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 10:17:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:04,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:04,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:04,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976157908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:04,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:04,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:04,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230873188] [2022-07-12 10:17:04,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:04,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:04,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:04,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:04,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:04,309 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 251 [2022-07-12 10:17:04,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 188 transitions, 398 flow. Second operand has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 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 10:17:04,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:04,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 251 [2022-07-12 10:17:04,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:04,364 INFO L129 PetriNetUnfolder]: 0/144 cut-off events. [2022-07-12 10:17:04,365 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:17:04,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 144 events. 0/144 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 121 event pairs, 0 based on Foata normal form. 2/146 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-12 10:17:04,365 INFO L132 encePairwiseOnDemand]: 246/251 looper letters, 9 selfloop transitions, 7 changer transitions 0/138 dead transitions. [2022-07-12 10:17:04,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 138 transitions, 328 flow [2022-07-12 10:17:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1782 transitions. [2022-07-12 10:17:04,369 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7888446215139442 [2022-07-12 10:17:04,369 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1782 transitions. [2022-07-12 10:17:04,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1782 transitions. [2022-07-12 10:17:04,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:04,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1782 transitions. [2022-07-12 10:17:04,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.0) internal successors, (1782), 9 states have internal predecessors, (1782), 0 states have call successors, (0), 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 10:17:04,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 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 10:17:04,377 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 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 10:17:04,377 INFO L186 Difference]: Start difference. First operand has 213 places, 188 transitions, 398 flow. Second operand 9 states and 1782 transitions. [2022-07-12 10:17:04,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 138 transitions, 328 flow [2022-07-12 10:17:04,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 138 transitions, 324 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:04,379 INFO L242 Difference]: Finished difference. Result has 146 places, 134 transitions, 298 flow [2022-07-12 10:17:04,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=298, PETRI_PLACES=146, PETRI_TRANSITIONS=134} [2022-07-12 10:17:04,380 INFO L279 CegarLoopForPetriNet]: 214 programPoint places, -68 predicate places. [2022-07-12 10:17:04,380 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 134 transitions, 298 flow [2022-07-12 10:17:04,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 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 10:17:04,382 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:04,382 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:04,416 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 10:17:04,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:04,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:04,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1234493863, now seen corresponding path program 1 times [2022-07-12 10:17:04,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:04,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035215187] [2022-07-12 10:17:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:04,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:04,617 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:04,632 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:04,632 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:04,632 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:17:04,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:17:04,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-12 10:17:04,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:17:04,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:17:04,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:17:04,633 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:17:04,634 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:04,634 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:17:04,659 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:17:04,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 258 places, 306 transitions, 642 flow [2022-07-12 10:17:04,718 INFO L129 PetriNetUnfolder]: 112/671 cut-off events. [2022-07-12 10:17:04,719 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:17:04,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 671 events. 112/671 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3150 event pairs, 1 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 472. Up to 16 conditions per place. [2022-07-12 10:17:04,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 306 transitions, 642 flow [2022-07-12 10:17:04,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 306 transitions, 642 flow [2022-07-12 10:17:04,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:04,736 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@7dcda47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47b2580c [2022-07-12 10:17:04,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:17:04,741 INFO L129 PetriNetUnfolder]: 6/99 cut-off events. [2022-07-12 10:17:04,741 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:04,741 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:04,741 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] [2022-07-12 10:17:04,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:04,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:04,742 INFO L85 PathProgramCache]: Analyzing trace with hash -670988188, now seen corresponding path program 1 times [2022-07-12 10:17:04,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:04,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677610832] [2022-07-12 10:17:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:04,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:04,767 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 10:17:04,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677610832] [2022-07-12 10:17:04,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677610832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:04,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:04,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:04,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184655881] [2022-07-12 10:17:04,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:04,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:04,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:04,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:04,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:04,770 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 306 [2022-07-12 10:17:04,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 306 transitions, 642 flow. Second operand has 2 states, 2 states have (on average 245.5) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 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 10:17:04,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:04,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 306 [2022-07-12 10:17:04,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:04,850 INFO L129 PetriNetUnfolder]: 12/555 cut-off events. [2022-07-12 10:17:04,850 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-12 10:17:04,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 555 events. 12/555 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2135 event pairs, 1 based on Foata normal form. 218/741 useless extension candidates. Maximal degree in co-relation 396. Up to 16 conditions per place. [2022-07-12 10:17:04,855 INFO L132 encePairwiseOnDemand]: 255/306 looper letters, 3 selfloop transitions, 0 changer transitions 22/251 dead transitions. [2022-07-12 10:17:04,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 251 transitions, 544 flow [2022-07-12 10:17:04,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 547 transitions. [2022-07-12 10:17:04,857 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8937908496732027 [2022-07-12 10:17:04,857 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 547 transitions. [2022-07-12 10:17:04,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 547 transitions. [2022-07-12 10:17:04,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:04,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 547 transitions. [2022-07-12 10:17:04,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 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 10:17:04,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 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 10:17:04,861 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 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 10:17:04,861 INFO L186 Difference]: Start difference. First operand has 258 places, 306 transitions, 642 flow. Second operand 2 states and 547 transitions. [2022-07-12 10:17:04,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 251 transitions, 544 flow [2022-07-12 10:17:04,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 251 transitions, 544 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:04,865 INFO L242 Difference]: Finished difference. Result has 255 places, 229 transitions, 479 flow [2022-07-12 10:17:04,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=479, PETRI_PLACES=255, PETRI_TRANSITIONS=229} [2022-07-12 10:17:04,868 INFO L279 CegarLoopForPetriNet]: 258 programPoint places, -3 predicate places. [2022-07-12 10:17:04,868 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 229 transitions, 479 flow [2022-07-12 10:17:04,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 245.5) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 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 10:17:04,869 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:04,869 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] [2022-07-12 10:17:04,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:17:04,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1827027749, now seen corresponding path program 1 times [2022-07-12 10:17:04,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:04,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023611588] [2022-07-12 10:17:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:04,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:04,909 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 10:17:04,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:04,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023611588] [2022-07-12 10:17:04,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023611588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:04,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:04,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:04,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915573165] [2022-07-12 10:17:04,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:04,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:04,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:04,916 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 306 [2022-07-12 10:17:04,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 229 transitions, 479 flow. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 10:17:04,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:04,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 306 [2022-07-12 10:17:04,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:04,976 INFO L129 PetriNetUnfolder]: 3/363 cut-off events. [2022-07-12 10:17:04,976 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:17:04,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 363 events. 3/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1217 event pairs, 0 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 397. Up to 18 conditions per place. [2022-07-12 10:17:04,979 INFO L132 encePairwiseOnDemand]: 303/306 looper letters, 12 selfloop transitions, 2 changer transitions 0/233 dead transitions. [2022-07-12 10:17:04,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 233 transitions, 515 flow [2022-07-12 10:17:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2022-07-12 10:17:04,983 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7941176470588235 [2022-07-12 10:17:04,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2022-07-12 10:17:04,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2022-07-12 10:17:04,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:04,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2022-07-12 10:17:04,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 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 10:17:04,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 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 10:17:04,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 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 10:17:04,988 INFO L186 Difference]: Start difference. First operand has 255 places, 229 transitions, 479 flow. Second operand 3 states and 729 transitions. [2022-07-12 10:17:04,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 233 transitions, 515 flow [2022-07-12 10:17:04,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 233 transitions, 509 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:04,992 INFO L242 Difference]: Finished difference. Result has 239 places, 230 transitions, 485 flow [2022-07-12 10:17:04,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=485, PETRI_PLACES=239, PETRI_TRANSITIONS=230} [2022-07-12 10:17:04,993 INFO L279 CegarLoopForPetriNet]: 258 programPoint places, -19 predicate places. [2022-07-12 10:17:04,995 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 230 transitions, 485 flow [2022-07-12 10:17:04,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 10:17:04,995 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:04,995 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] [2022-07-12 10:17:04,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:17:04,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:04,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2032357282, now seen corresponding path program 1 times [2022-07-12 10:17:04,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:04,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730311124] [2022-07-12 10:17:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:05,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:05,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730311124] [2022-07-12 10:17:05,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730311124] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:05,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927571158] [2022-07-12 10:17:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:05,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:05,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:05,056 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 10:17:05,073 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 10:17:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:05,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:05,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:05,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:05,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927571158] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:05,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:05,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:05,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647035152] [2022-07-12 10:17:05,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:05,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:05,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:05,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:05,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:05,256 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 306 [2022-07-12 10:17:05,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 230 transitions, 485 flow. Second operand has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 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 10:17:05,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:05,258 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 306 [2022-07-12 10:17:05,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:05,353 INFO L129 PetriNetUnfolder]: 1/251 cut-off events. [2022-07-12 10:17:05,367 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:17:05,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 251 events. 1/251 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 503 event pairs, 0 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 289. Up to 7 conditions per place. [2022-07-12 10:17:05,370 INFO L132 encePairwiseOnDemand]: 300/306 looper letters, 13 selfloop transitions, 9 changer transitions 0/240 dead transitions. [2022-07-12 10:17:05,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 240 transitions, 551 flow [2022-07-12 10:17:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2157 transitions. [2022-07-12 10:17:05,374 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7832244008714597 [2022-07-12 10:17:05,374 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2157 transitions. [2022-07-12 10:17:05,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2157 transitions. [2022-07-12 10:17:05,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:05,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2157 transitions. [2022-07-12 10:17:05,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 239.66666666666666) internal successors, (2157), 9 states have internal predecessors, (2157), 0 states have call successors, (0), 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 10:17:05,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 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 10:17:05,398 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 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 10:17:05,398 INFO L186 Difference]: Start difference. First operand has 239 places, 230 transitions, 485 flow. Second operand 9 states and 2157 transitions. [2022-07-12 10:17:05,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 240 transitions, 551 flow [2022-07-12 10:17:05,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 240 transitions, 549 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:05,402 INFO L242 Difference]: Finished difference. Result has 249 places, 236 transitions, 533 flow [2022-07-12 10:17:05,402 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=533, PETRI_PLACES=249, PETRI_TRANSITIONS=236} [2022-07-12 10:17:05,403 INFO L279 CegarLoopForPetriNet]: 258 programPoint places, -9 predicate places. [2022-07-12 10:17:05,403 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 236 transitions, 533 flow [2022-07-12 10:17:05,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 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 10:17:05,404 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:05,404 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:05,429 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 10:17:05,604 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,SelfDestructingSolverStorable7 [2022-07-12 10:17:05,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:05,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:05,606 INFO L85 PathProgramCache]: Analyzing trace with hash -776467533, now seen corresponding path program 1 times [2022-07-12 10:17:05,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:05,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421597995] [2022-07-12 10:17:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:05,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:05,618 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:05,633 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:05,633 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:05,633 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:17:05,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:17:05,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-12 10:17:05,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:17:05,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:17:05,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:17:05,634 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:17:05,635 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:05,635 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:17:05,652 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:17:05,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 302 places, 361 transitions, 766 flow [2022-07-12 10:17:05,769 INFO L129 PetriNetUnfolder]: 160/946 cut-off events. [2022-07-12 10:17:05,769 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-12 10:17:05,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 946 events. 160/946 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4656 event pairs, 6 based on Foata normal form. 0/766 useless extension candidates. Maximal degree in co-relation 691. Up to 32 conditions per place. [2022-07-12 10:17:05,778 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 361 transitions, 766 flow [2022-07-12 10:17:05,787 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 361 transitions, 766 flow [2022-07-12 10:17:05,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:05,789 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@7dcda47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47b2580c [2022-07-12 10:17:05,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:17:05,793 INFO L129 PetriNetUnfolder]: 6/100 cut-off events. [2022-07-12 10:17:05,793 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:05,793 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:05,794 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] [2022-07-12 10:17:05,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:05,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:05,794 INFO L85 PathProgramCache]: Analyzing trace with hash 667296612, now seen corresponding path program 1 times [2022-07-12 10:17:05,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:05,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003024898] [2022-07-12 10:17:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:05,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:05,807 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 10:17:05,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:05,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003024898] [2022-07-12 10:17:05,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003024898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:05,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:05,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:05,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125801395] [2022-07-12 10:17:05,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:05,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:05,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:05,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:05,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:05,810 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 361 [2022-07-12 10:17:05,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 361 transitions, 766 flow. Second operand has 2 states, 2 states have (on average 286.5) internal successors, (573), 2 states have internal predecessors, (573), 0 states have call successors, (0), 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 10:17:05,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:05,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 361 [2022-07-12 10:17:05,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:05,942 INFO L129 PetriNetUnfolder]: 26/792 cut-off events. [2022-07-12 10:17:05,942 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-07-12 10:17:05,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 792 events. 26/792 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3587 event pairs, 6 based on Foata normal form. 497/1243 useless extension candidates. Maximal degree in co-relation 590. Up to 37 conditions per place. [2022-07-12 10:17:05,949 INFO L132 encePairwiseOnDemand]: 298/361 looper letters, 4 selfloop transitions, 0 changer transitions 23/294 dead transitions. [2022-07-12 10:17:05,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 294 transitions, 648 flow [2022-07-12 10:17:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 643 transitions. [2022-07-12 10:17:05,951 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8905817174515236 [2022-07-12 10:17:05,951 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 643 transitions. [2022-07-12 10:17:05,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 643 transitions. [2022-07-12 10:17:05,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:05,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 643 transitions. [2022-07-12 10:17:05,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 321.5) internal successors, (643), 2 states have internal predecessors, (643), 0 states have call successors, (0), 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 10:17:05,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 0 states have call successors, (0), 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 10:17:05,954 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 0 states have call successors, (0), 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 10:17:05,954 INFO L186 Difference]: Start difference. First operand has 302 places, 361 transitions, 766 flow. Second operand 2 states and 643 transitions. [2022-07-12 10:17:05,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 294 transitions, 648 flow [2022-07-12 10:17:05,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 294 transitions, 648 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:05,962 INFO L242 Difference]: Finished difference. Result has 299 places, 271 transitions, 574 flow [2022-07-12 10:17:05,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=574, PETRI_PLACES=299, PETRI_TRANSITIONS=271} [2022-07-12 10:17:05,964 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, -3 predicate places. [2022-07-12 10:17:05,964 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 271 transitions, 574 flow [2022-07-12 10:17:05,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 286.5) internal successors, (573), 2 states have internal predecessors, (573), 0 states have call successors, (0), 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 10:17:05,964 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:05,965 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] [2022-07-12 10:17:05,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:17:05,965 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:05,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1129654747, now seen corresponding path program 1 times [2022-07-12 10:17:05,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:05,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344922444] [2022-07-12 10:17:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:05,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:05,994 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 10:17:05,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344922444] [2022-07-12 10:17:05,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344922444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:05,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:05,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:05,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053091808] [2022-07-12 10:17:05,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:05,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:05,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:05,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:05,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:05,997 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 361 [2022-07-12 10:17:05,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 271 transitions, 574 flow. Second operand has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 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 10:17:05,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:05,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 361 [2022-07-12 10:17:05,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:06,076 INFO L129 PetriNetUnfolder]: 4/470 cut-off events. [2022-07-12 10:17:06,076 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:17:06,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 470 events. 4/470 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1835 event pairs, 0 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 516. Up to 24 conditions per place. [2022-07-12 10:17:06,079 INFO L132 encePairwiseOnDemand]: 358/361 looper letters, 13 selfloop transitions, 2 changer transitions 0/275 dead transitions. [2022-07-12 10:17:06,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 275 transitions, 612 flow [2022-07-12 10:17:06,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:06,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 853 transitions. [2022-07-12 10:17:06,082 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7876269621421976 [2022-07-12 10:17:06,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 853 transitions. [2022-07-12 10:17:06,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 853 transitions. [2022-07-12 10:17:06,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:06,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 853 transitions. [2022-07-12 10:17:06,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 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 10:17:06,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 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 10:17:06,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 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 10:17:06,086 INFO L186 Difference]: Start difference. First operand has 299 places, 271 transitions, 574 flow. Second operand 3 states and 853 transitions. [2022-07-12 10:17:06,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 275 transitions, 612 flow [2022-07-12 10:17:06,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 275 transitions, 600 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:06,090 INFO L242 Difference]: Finished difference. Result has 283 places, 272 transitions, 574 flow [2022-07-12 10:17:06,090 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=574, PETRI_PLACES=283, PETRI_TRANSITIONS=272} [2022-07-12 10:17:06,091 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, -19 predicate places. [2022-07-12 10:17:06,091 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 272 transitions, 574 flow [2022-07-12 10:17:06,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 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 10:17:06,092 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:06,092 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] [2022-07-12 10:17:06,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:17:06,092 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:06,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:06,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1054315315, now seen corresponding path program 1 times [2022-07-12 10:17:06,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:06,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536572815] [2022-07-12 10:17:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:06,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536572815] [2022-07-12 10:17:06,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536572815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:06,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340561819] [2022-07-12 10:17:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:06,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:06,135 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 10:17:06,159 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 10:17:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:06,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340561819] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:06,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:06,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:06,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407858193] [2022-07-12 10:17:06,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:06,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:06,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:06,296 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 361 [2022-07-12 10:17:06,299 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 272 transitions, 574 flow. Second operand has 10 states, 10 states have (on average 280.3) internal successors, (2803), 10 states have internal predecessors, (2803), 0 states have call successors, (0), 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 10:17:06,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:06,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 361 [2022-07-12 10:17:06,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:06,397 INFO L129 PetriNetUnfolder]: 2/358 cut-off events. [2022-07-12 10:17:06,397 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:17:06,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 358 events. 2/358 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1071 event pairs, 0 based on Foata normal form. 2/352 useless extension candidates. Maximal degree in co-relation 408. Up to 11 conditions per place. [2022-07-12 10:17:06,402 INFO L132 encePairwiseOnDemand]: 355/361 looper letters, 14 selfloop transitions, 9 changer transitions 0/282 dead transitions. [2022-07-12 10:17:06,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 282 transitions, 642 flow [2022-07-12 10:17:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2527 transitions. [2022-07-12 10:17:06,406 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-07-12 10:17:06,406 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2527 transitions. [2022-07-12 10:17:06,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2527 transitions. [2022-07-12 10:17:06,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:06,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2527 transitions. [2022-07-12 10:17:06,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 280.77777777777777) internal successors, (2527), 9 states have internal predecessors, (2527), 0 states have call successors, (0), 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 10:17:06,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 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 10:17:06,416 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 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 10:17:06,416 INFO L186 Difference]: Start difference. First operand has 283 places, 272 transitions, 574 flow. Second operand 9 states and 2527 transitions. [2022-07-12 10:17:06,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 282 transitions, 642 flow [2022-07-12 10:17:06,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 282 transitions, 640 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:06,420 INFO L242 Difference]: Finished difference. Result has 293 places, 278 transitions, 622 flow [2022-07-12 10:17:06,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=622, PETRI_PLACES=293, PETRI_TRANSITIONS=278} [2022-07-12 10:17:06,422 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, -9 predicate places. [2022-07-12 10:17:06,422 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 278 transitions, 622 flow [2022-07-12 10:17:06,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 280.3) internal successors, (2803), 10 states have internal predecessors, (2803), 0 states have call successors, (0), 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 10:17:06,423 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:06,423 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:06,461 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 10:17:06,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:06,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:06,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:06,642 INFO L85 PathProgramCache]: Analyzing trace with hash 585911698, now seen corresponding path program 1 times [2022-07-12 10:17:06,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:06,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457545316] [2022-07-12 10:17:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 10:17:06,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:06,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457545316] [2022-07-12 10:17:06,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457545316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:06,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:06,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:17:06,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272193721] [2022-07-12 10:17:06,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:06,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:17:06,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:06,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:17:06,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:17:06,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 361 [2022-07-12 10:17:06,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 278 transitions, 622 flow. Second operand has 5 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 0 states have call successors, (0), 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 10:17:06,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:06,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 361 [2022-07-12 10:17:06,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:36,556 INFO L129 PetriNetUnfolder]: 69512/231194 cut-off events. [2022-07-12 10:17:36,556 INFO L130 PetriNetUnfolder]: For 475/475 co-relation queries the response was YES. [2022-07-12 10:17:39,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 323415 conditions, 231194 events. 69512/231194 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 5529. Compared 3764820 event pairs, 24598 based on Foata normal form. 750/226608 useless extension candidates. Maximal degree in co-relation 323404. Up to 40763 conditions per place. [2022-07-12 10:17:40,336 INFO L132 encePairwiseOnDemand]: 340/361 looper letters, 109 selfloop transitions, 35 changer transitions 5/387 dead transitions. [2022-07-12 10:17:40,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 387 transitions, 1153 flow [2022-07-12 10:17:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2396 transitions. [2022-07-12 10:17:40,341 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7374576792859341 [2022-07-12 10:17:40,341 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2396 transitions. [2022-07-12 10:17:40,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2396 transitions. [2022-07-12 10:17:40,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:40,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2396 transitions. [2022-07-12 10:17:40,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 266.22222222222223) internal successors, (2396), 9 states have internal predecessors, (2396), 0 states have call successors, (0), 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 10:17:40,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 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 10:17:40,350 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 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 10:17:40,350 INFO L186 Difference]: Start difference. First operand has 293 places, 278 transitions, 622 flow. Second operand 9 states and 2396 transitions. [2022-07-12 10:17:40,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 387 transitions, 1153 flow [2022-07-12 10:17:40,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 387 transitions, 1147 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:40,355 INFO L242 Difference]: Finished difference. Result has 307 places, 308 transitions, 868 flow [2022-07-12 10:17:40,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=868, PETRI_PLACES=307, PETRI_TRANSITIONS=308} [2022-07-12 10:17:40,356 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 5 predicate places. [2022-07-12 10:17:40,356 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 308 transitions, 868 flow [2022-07-12 10:17:40,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 0 states have call successors, (0), 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 10:17:40,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:40,357 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:40,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:17:40,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:40,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:40,358 INFO L85 PathProgramCache]: Analyzing trace with hash 352051992, now seen corresponding path program 1 times [2022-07-12 10:17:40,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:40,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666428683] [2022-07-12 10:17:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:40,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:40,372 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:40,384 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:40,384 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:40,385 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:17:40,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:17:40,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-12 10:17:40,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:17:40,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:17:40,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:17:40,385 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:17:40,386 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:40,386 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:17:40,404 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-12 10:17:40,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 346 places, 416 transitions, 892 flow [2022-07-12 10:17:40,540 INFO L129 PetriNetUnfolder]: 236/1361 cut-off events. [2022-07-12 10:17:40,540 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-12 10:17:40,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1472 conditions, 1361 events. 236/1361 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 7200 event pairs, 23 based on Foata normal form. 0/1117 useless extension candidates. Maximal degree in co-relation 991. Up to 80 conditions per place. [2022-07-12 10:17:40,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 416 transitions, 892 flow [2022-07-12 10:17:40,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 416 transitions, 892 flow [2022-07-12 10:17:40,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:40,582 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@7dcda47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47b2580c [2022-07-12 10:17:40,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:17:40,585 INFO L129 PetriNetUnfolder]: 6/104 cut-off events. [2022-07-12 10:17:40,586 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:40,586 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:40,586 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] [2022-07-12 10:17:40,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:40,586 INFO L85 PathProgramCache]: Analyzing trace with hash -871955612, now seen corresponding path program 1 times [2022-07-12 10:17:40,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:40,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503887137] [2022-07-12 10:17:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:40,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:40,596 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 10:17:40,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503887137] [2022-07-12 10:17:40,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503887137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:40,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:40,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:40,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798820958] [2022-07-12 10:17:40,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:40,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:40,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:40,599 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 416 [2022-07-12 10:17:40,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 416 transitions, 892 flow. Second operand has 2 states, 2 states have (on average 327.5) internal successors, (655), 2 states have internal predecessors, (655), 0 states have call successors, (0), 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 10:17:40,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:40,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 416 [2022-07-12 10:17:40,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:40,755 INFO L129 PetriNetUnfolder]: 60/1161 cut-off events. [2022-07-12 10:17:40,755 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2022-07-12 10:17:40,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 1161 events. 60/1161 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5992 event pairs, 23 based on Foata normal form. 1132/2225 useless extension candidates. Maximal degree in co-relation 873. Up to 86 conditions per place. [2022-07-12 10:17:40,771 INFO L132 encePairwiseOnDemand]: 341/416 looper letters, 5 selfloop transitions, 0 changer transitions 24/337 dead transitions. [2022-07-12 10:17:40,771 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 337 transitions, 754 flow [2022-07-12 10:17:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:40,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 739 transitions. [2022-07-12 10:17:40,773 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8882211538461539 [2022-07-12 10:17:40,773 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 739 transitions. [2022-07-12 10:17:40,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 739 transitions. [2022-07-12 10:17:40,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:40,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 739 transitions. [2022-07-12 10:17:40,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 369.5) internal successors, (739), 2 states have internal predecessors, (739), 0 states have call successors, (0), 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 10:17:40,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 416.0) internal successors, (1248), 3 states have internal predecessors, (1248), 0 states have call successors, (0), 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 10:17:40,776 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 416.0) internal successors, (1248), 3 states have internal predecessors, (1248), 0 states have call successors, (0), 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 10:17:40,776 INFO L186 Difference]: Start difference. First operand has 346 places, 416 transitions, 892 flow. Second operand 2 states and 739 transitions. [2022-07-12 10:17:40,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 337 transitions, 754 flow [2022-07-12 10:17:40,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 337 transitions, 754 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:40,781 INFO L242 Difference]: Finished difference. Result has 343 places, 313 transitions, 671 flow [2022-07-12 10:17:40,781 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=671, PETRI_PLACES=343, PETRI_TRANSITIONS=313} [2022-07-12 10:17:40,781 INFO L279 CegarLoopForPetriNet]: 346 programPoint places, -3 predicate places. [2022-07-12 10:17:40,782 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 313 transitions, 671 flow [2022-07-12 10:17:40,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 327.5) internal successors, (655), 2 states have internal predecessors, (655), 0 states have call successors, (0), 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 10:17:40,782 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:40,782 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] [2022-07-12 10:17:40,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:17:40,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:40,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:40,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1626060325, now seen corresponding path program 1 times [2022-07-12 10:17:40,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:40,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675343689] [2022-07-12 10:17:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:40,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:40,796 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 10:17:40,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:40,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675343689] [2022-07-12 10:17:40,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675343689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:40,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:40,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206744820] [2022-07-12 10:17:40,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:40,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:40,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:40,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:40,798 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 416 [2022-07-12 10:17:40,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 313 transitions, 671 flow. Second operand has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 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 10:17:40,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:40,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 416 [2022-07-12 10:17:40,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:40,874 INFO L129 PetriNetUnfolder]: 5/577 cut-off events. [2022-07-12 10:17:40,874 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:17:40,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 577 events. 5/577 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2479 event pairs, 0 based on Foata normal form. 0/552 useless extension candidates. Maximal degree in co-relation 636. Up to 30 conditions per place. [2022-07-12 10:17:40,879 INFO L132 encePairwiseOnDemand]: 413/416 looper letters, 14 selfloop transitions, 2 changer transitions 0/317 dead transitions. [2022-07-12 10:17:40,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 317 transitions, 711 flow [2022-07-12 10:17:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:40,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 977 transitions. [2022-07-12 10:17:40,881 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7828525641025641 [2022-07-12 10:17:40,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 977 transitions. [2022-07-12 10:17:40,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 977 transitions. [2022-07-12 10:17:40,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:40,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 977 transitions. [2022-07-12 10:17:40,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.6666666666667) internal successors, (977), 3 states have internal predecessors, (977), 0 states have call successors, (0), 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 10:17:40,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 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 10:17:40,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 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 10:17:40,885 INFO L186 Difference]: Start difference. First operand has 343 places, 313 transitions, 671 flow. Second operand 3 states and 977 transitions. [2022-07-12 10:17:40,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 317 transitions, 711 flow [2022-07-12 10:17:40,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 317 transitions, 691 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:40,889 INFO L242 Difference]: Finished difference. Result has 327 places, 314 transitions, 663 flow [2022-07-12 10:17:40,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=663, PETRI_PLACES=327, PETRI_TRANSITIONS=314} [2022-07-12 10:17:40,890 INFO L279 CegarLoopForPetriNet]: 346 programPoint places, -19 predicate places. [2022-07-12 10:17:40,890 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 314 transitions, 663 flow [2022-07-12 10:17:40,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 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 10:17:40,890 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:40,890 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] [2022-07-12 10:17:40,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:17:40,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:40,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:40,891 INFO L85 PathProgramCache]: Analyzing trace with hash -355832472, now seen corresponding path program 1 times [2022-07-12 10:17:40,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:40,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943245343] [2022-07-12 10:17:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:40,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:40,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:40,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943245343] [2022-07-12 10:17:40,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943245343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:40,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817459035] [2022-07-12 10:17:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:40,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:40,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:40,931 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 10:17:40,979 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 10:17:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:41,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:41,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:41,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:41,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817459035] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:41,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:41,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:41,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124413824] [2022-07-12 10:17:41,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:41,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:41,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:41,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:41,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:41,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 416 [2022-07-12 10:17:41,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 314 transitions, 663 flow. Second operand has 10 states, 10 states have (on average 321.3) internal successors, (3213), 10 states have internal predecessors, (3213), 0 states have call successors, (0), 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 10:17:41,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:41,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 416 [2022-07-12 10:17:41,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:41,217 INFO L129 PetriNetUnfolder]: 3/465 cut-off events. [2022-07-12 10:17:41,218 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:17:41,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 465 events. 3/465 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1652 event pairs, 0 based on Foata normal form. 2/455 useless extension candidates. Maximal degree in co-relation 527. Up to 15 conditions per place. [2022-07-12 10:17:41,225 INFO L132 encePairwiseOnDemand]: 410/416 looper letters, 15 selfloop transitions, 9 changer transitions 0/324 dead transitions. [2022-07-12 10:17:41,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 324 transitions, 733 flow [2022-07-12 10:17:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2897 transitions. [2022-07-12 10:17:41,229 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7737713675213675 [2022-07-12 10:17:41,229 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2897 transitions. [2022-07-12 10:17:41,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2897 transitions. [2022-07-12 10:17:41,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:41,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2897 transitions. [2022-07-12 10:17:41,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 321.8888888888889) internal successors, (2897), 9 states have internal predecessors, (2897), 0 states have call successors, (0), 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 10:17:41,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 416.0) internal successors, (4160), 10 states have internal predecessors, (4160), 0 states have call successors, (0), 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 10:17:41,238 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 416.0) internal successors, (4160), 10 states have internal predecessors, (4160), 0 states have call successors, (0), 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 10:17:41,239 INFO L186 Difference]: Start difference. First operand has 327 places, 314 transitions, 663 flow. Second operand 9 states and 2897 transitions. [2022-07-12 10:17:41,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 324 transitions, 733 flow [2022-07-12 10:17:41,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 324 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:41,243 INFO L242 Difference]: Finished difference. Result has 337 places, 320 transitions, 711 flow [2022-07-12 10:17:41,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=711, PETRI_PLACES=337, PETRI_TRANSITIONS=320} [2022-07-12 10:17:41,244 INFO L279 CegarLoopForPetriNet]: 346 programPoint places, -9 predicate places. [2022-07-12 10:17:41,244 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 320 transitions, 711 flow [2022-07-12 10:17:41,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 321.3) internal successors, (3213), 10 states have internal predecessors, (3213), 0 states have call successors, (0), 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 10:17:41,245 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:41,245 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:41,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:41,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 10:17:41,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:17:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:41,464 INFO L85 PathProgramCache]: Analyzing trace with hash 399864177, now seen corresponding path program 1 times [2022-07-12 10:17:41,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:41,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135996225] [2022-07-12 10:17:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:41,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 10:17:41,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:41,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135996225] [2022-07-12 10:17:41,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135996225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:41,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:41,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:17:41,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009028588] [2022-07-12 10:17:41,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:41,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:17:41,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:41,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:17:41,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:17:41,535 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 416 [2022-07-12 10:17:41,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 320 transitions, 711 flow. Second operand has 5 states, 5 states have (on average 287.6) internal successors, (1438), 5 states have internal predecessors, (1438), 0 states have call successors, (0), 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 10:17:41,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:41,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 416 [2022-07-12 10:17:41,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand