./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:08:04,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:08:04,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:08:04,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:08:04,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:08:04,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:08:04,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:08:04,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:08:04,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:08:04,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:08:04,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:08:04,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:08:04,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:08:04,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:08:04,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:08:04,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:08:04,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:08:04,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:08:04,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:08:04,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:08:04,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:08:04,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:08:04,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:08:04,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:08:04,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:08:04,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:08:04,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:08:04,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:08:04,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:08:04,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:08:04,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:08:04,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:08:04,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:08:04,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:08:04,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:08:04,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:08:04,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:08:04,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:08:04,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:08:04,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:08:04,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:08:04,468 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 03:08:04,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:08:04,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:08:04,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:08:04,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:08:04,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:08:04,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:08:04,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:08:04,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:08:04,505 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:08:04,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:08:04,505 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 03:08:04,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:08:04,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 03:08:04,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:08:04,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:08:04,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:08:04,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:08:04,507 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 03:08:04,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:08:04,507 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:08:04,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:08:04,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:08:04,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:08:04,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:08:04,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:08:04,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:08:04,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:08:04,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:08:04,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:08:04,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:08:04,509 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:08:04,509 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:08:04,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:08:04,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df [2021-12-28 03:08:04,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:08:04,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:08:04,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:08:04,844 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:08:04,845 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:08:04,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2021-12-28 03:08:04,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/209ccfe82/e2dd39272c7344bf93eb1a03571838e7/FLAG814f214f1 [2021-12-28 03:08:05,328 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:08:05,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2021-12-28 03:08:05,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/209ccfe82/e2dd39272c7344bf93eb1a03571838e7/FLAG814f214f1 [2021-12-28 03:08:05,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/209ccfe82/e2dd39272c7344bf93eb1a03571838e7 [2021-12-28 03:08:05,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:08:05,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:08:05,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:08:05,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:08:05,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:08:05,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df76587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05, skipping insertion in model container [2021-12-28 03:08:05,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:08:05,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:08:05,543 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2021-12-28 03:08:05,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:08:05,602 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:08:05,634 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2021-12-28 03:08:05,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:08:05,655 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:08:05,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05 WrapperNode [2021-12-28 03:08:05,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:08:05,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:08:05,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:08:05,657 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:08:05,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,703 INFO L137 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2021-12-28 03:08:05,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:08:05,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:08:05,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:08:05,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:08:05,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:08:05,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:08:05,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:08:05,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:08:05,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05" (1/1) ... [2021-12-28 03:08:05,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:08:05,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:05,788 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) [2021-12-28 03:08:05,819 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 [2021-12-28 03:08:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:08:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-28 03:08:05,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-28 03:08:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-28 03:08:05,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-28 03:08:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:08:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:08:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:08:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-28 03:08:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-28 03:08:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:08:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:08:05,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:08:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:08:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:08:05,834 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-28 03:08:05,932 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:08:05,934 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:08:06,220 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:08:06,328 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:08:06,328 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 03:08:06,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:08:06 BoogieIcfgContainer [2021-12-28 03:08:06,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:08:06,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:08:06,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:08:06,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:08:06,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:08:05" (1/3) ... [2021-12-28 03:08:06,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46082875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:08:06, skipping insertion in model container [2021-12-28 03:08:06,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:05" (2/3) ... [2021-12-28 03:08:06,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46082875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:08:06, skipping insertion in model container [2021-12-28 03:08:06,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:08:06" (3/3) ... [2021-12-28 03:08:06,337 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2021-12-28 03:08:06,341 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 03:08:06,341 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:08:06,341 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:08:06,342 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 03:08:06,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,389 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,389 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,389 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,390 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,390 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,390 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,391 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,391 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,391 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,391 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,392 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,392 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,392 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,392 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,394 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,394 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,394 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,394 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,394 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,395 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,395 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,395 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,395 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,396 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,396 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,396 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,396 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,396 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,397 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,397 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,397 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,397 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,397 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,398 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,398 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,398 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,398 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,399 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,399 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,399 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,403 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,403 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,403 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,403 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,404 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,404 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,404 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,405 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,405 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,406 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,406 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,406 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,407 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:06,410 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-28 03:08:06,473 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:08:06,487 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 03:08:06,487 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-28 03:08:06,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 136 transitions, 288 flow [2021-12-28 03:08:06,581 INFO L129 PetriNetUnfolder]: 11/134 cut-off events. [2021-12-28 03:08:06,584 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:08:06,589 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2021-12-28 03:08:06,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 136 transitions, 288 flow [2021-12-28 03:08:06,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2021-12-28 03:08:06,643 INFO L129 PetriNetUnfolder]: 11/124 cut-off events. [2021-12-28 03:08:06,644 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:08:06,644 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:06,645 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:08:06,647 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash 321786498, now seen corresponding path program 1 times [2021-12-28 03:08:06,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:06,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198477888] [2021-12-28 03:08:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:06,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:06,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:06,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198477888] [2021-12-28 03:08:06,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198477888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:06,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:06,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 03:08:06,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155166574] [2021-12-28 03:08:06,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:06,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 03:08:06,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:06,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 03:08:06,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 03:08:06,957 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 136 [2021-12-28 03:08:06,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 262 flow. Second operand has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:06,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:06,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 136 [2021-12-28 03:08:06,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:07,024 INFO L129 PetriNetUnfolder]: 12/147 cut-off events. [2021-12-28 03:08:07,025 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-12-28 03:08:07,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 147 events. 12/147 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 5 based on Foata normal form. 14/150 useless extension candidates. Maximal degree in co-relation 97. Up to 22 conditions per place. [2021-12-28 03:08:07,028 INFO L132 encePairwiseOnDemand]: 128/136 looper letters, 7 selfloop transitions, 0 changer transitions 4/117 dead transitions. [2021-12-28 03:08:07,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 117 transitions, 260 flow [2021-12-28 03:08:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 03:08:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-28 03:08:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 255 transitions. [2021-12-28 03:08:07,044 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9375 [2021-12-28 03:08:07,045 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 255 transitions. [2021-12-28 03:08:07,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 255 transitions. [2021-12-28 03:08:07,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:07,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 255 transitions. [2021-12-28 03:08:07,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,063 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,065 INFO L186 Difference]: Start difference. First operand has 121 places, 125 transitions, 262 flow. Second operand 2 states and 255 transitions. [2021-12-28 03:08:07,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 117 transitions, 260 flow [2021-12-28 03:08:07,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 117 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 03:08:07,074 INFO L242 Difference]: Finished difference. Result has 118 places, 113 transitions, 230 flow [2021-12-28 03:08:07,075 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2021-12-28 03:08:07,079 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, -3 predicate places. [2021-12-28 03:08:07,080 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 230 flow [2021-12-28 03:08:07,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,080 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:07,081 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:08:07,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:08:07,082 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:07,082 INFO L85 PathProgramCache]: Analyzing trace with hash -632914253, now seen corresponding path program 1 times [2021-12-28 03:08:07,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:07,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303864321] [2021-12-28 03:08:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:07,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:07,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:07,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303864321] [2021-12-28 03:08:07,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303864321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:07,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:07,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:08:07,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382979353] [2021-12-28 03:08:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:07,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:08:07,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:07,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:08:07,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:08:07,275 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 136 [2021-12-28 03:08:07,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:07,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 136 [2021-12-28 03:08:07,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:07,408 INFO L129 PetriNetUnfolder]: 12/179 cut-off events. [2021-12-28 03:08:07,409 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-28 03:08:07,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 179 events. 12/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 250 event pairs, 5 based on Foata normal form. 5/175 useless extension candidates. Maximal degree in co-relation 227. Up to 31 conditions per place. [2021-12-28 03:08:07,410 INFO L132 encePairwiseOnDemand]: 126/136 looper letters, 19 selfloop transitions, 6 changer transitions 3/120 dead transitions. [2021-12-28 03:08:07,411 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 120 transitions, 302 flow [2021-12-28 03:08:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:08:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 03:08:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2021-12-28 03:08:07,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8119747899159664 [2021-12-28 03:08:07,417 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2021-12-28 03:08:07,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2021-12-28 03:08:07,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:07,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2021-12-28 03:08:07,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,424 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,425 INFO L186 Difference]: Start difference. First operand has 118 places, 113 transitions, 230 flow. Second operand 7 states and 773 transitions. [2021-12-28 03:08:07,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 120 transitions, 302 flow [2021-12-28 03:08:07,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 120 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-28 03:08:07,428 INFO L242 Difference]: Finished difference. Result has 122 places, 114 transitions, 256 flow [2021-12-28 03:08:07,428 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=256, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2021-12-28 03:08:07,429 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2021-12-28 03:08:07,430 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 256 flow [2021-12-28 03:08:07,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,431 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:07,431 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:08:07,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:08:07,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:07,434 INFO L85 PathProgramCache]: Analyzing trace with hash 853527032, now seen corresponding path program 1 times [2021-12-28 03:08:07,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:07,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551125970] [2021-12-28 03:08:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:07,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:08:07,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:07,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551125970] [2021-12-28 03:08:07,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551125970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:07,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:07,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:08:07,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941624091] [2021-12-28 03:08:07,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:07,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:08:07,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:07,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:08:07,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:08:07,558 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2021-12-28 03:08:07,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:07,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2021-12-28 03:08:07,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:07,596 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2021-12-28 03:08:07,597 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-12-28 03:08:07,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 156 events. 13/156 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 1 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 208. Up to 23 conditions per place. [2021-12-28 03:08:07,598 INFO L132 encePairwiseOnDemand]: 132/136 looper letters, 11 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2021-12-28 03:08:07,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 117 transitions, 295 flow [2021-12-28 03:08:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:08:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-28 03:08:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2021-12-28 03:08:07,600 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8897058823529411 [2021-12-28 03:08:07,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2021-12-28 03:08:07,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2021-12-28 03:08:07,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:07,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2021-12-28 03:08:07,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,603 INFO L186 Difference]: Start difference. First operand has 122 places, 114 transitions, 256 flow. Second operand 3 states and 363 transitions. [2021-12-28 03:08:07,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 117 transitions, 295 flow [2021-12-28 03:08:07,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 03:08:07,607 INFO L242 Difference]: Finished difference. Result has 120 places, 116 transitions, 269 flow [2021-12-28 03:08:07,607 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=120, PETRI_TRANSITIONS=116} [2021-12-28 03:08:07,608 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2021-12-28 03:08:07,608 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 116 transitions, 269 flow [2021-12-28 03:08:07,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,609 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:07,609 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:08:07,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:08:07,609 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:07,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1991812262, now seen corresponding path program 2 times [2021-12-28 03:08:07,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:07,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925761417] [2021-12-28 03:08:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:07,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:08:07,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:07,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925761417] [2021-12-28 03:08:07,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925761417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:07,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:07,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-28 03:08:07,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627701974] [2021-12-28 03:08:07,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:07,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:08:07,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:07,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:08:07,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:08:07,838 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 136 [2021-12-28 03:08:07,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 116 transitions, 269 flow. Second operand has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:07,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:07,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 136 [2021-12-28 03:08:07,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:08,079 INFO L129 PetriNetUnfolder]: 82/335 cut-off events. [2021-12-28 03:08:08,080 INFO L130 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2021-12-28 03:08:08,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 335 events. 82/335 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1209 event pairs, 20 based on Foata normal form. 1/312 useless extension candidates. Maximal degree in co-relation 637. Up to 73 conditions per place. [2021-12-28 03:08:08,085 INFO L132 encePairwiseOnDemand]: 121/136 looper letters, 49 selfloop transitions, 13 changer transitions 6/147 dead transitions. [2021-12-28 03:08:08,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 147 transitions, 498 flow [2021-12-28 03:08:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 03:08:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-28 03:08:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1213 transitions. [2021-12-28 03:08:08,089 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6860859728506787 [2021-12-28 03:08:08,089 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1213 transitions. [2021-12-28 03:08:08,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1213 transitions. [2021-12-28 03:08:08,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:08,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1213 transitions. [2021-12-28 03:08:08,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 93.3076923076923) internal successors, (1213), 13 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:08,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:08,097 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:08,097 INFO L186 Difference]: Start difference. First operand has 120 places, 116 transitions, 269 flow. Second operand 13 states and 1213 transitions. [2021-12-28 03:08:08,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 147 transitions, 498 flow [2021-12-28 03:08:08,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 147 transitions, 473 flow, removed 11 selfloop flow, removed 2 redundant places. [2021-12-28 03:08:08,104 INFO L242 Difference]: Finished difference. Result has 135 places, 122 transitions, 318 flow [2021-12-28 03:08:08,104 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=318, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2021-12-28 03:08:08,106 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 14 predicate places. [2021-12-28 03:08:08,106 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 318 flow [2021-12-28 03:08:08,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:08,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:08,107 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:08:08,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:08:08,107 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:08,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash -199541928, now seen corresponding path program 1 times [2021-12-28 03:08:08,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:08,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937104964] [2021-12-28 03:08:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:08,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:08,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:08,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937104964] [2021-12-28 03:08:08,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937104964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:08,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479138077] [2021-12-28 03:08:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:08,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:08,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:08,330 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) [2021-12-28 03:08:08,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:08:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:08,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:08:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:08:08,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:08:08,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479138077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:08,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:08:08,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 12 [2021-12-28 03:08:08,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005066837] [2021-12-28 03:08:08,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:08,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:08:08,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:08,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:08:08,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:08:08,700 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2021-12-28 03:08:08,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:08,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:08,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2021-12-28 03:08:08,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:08,757 INFO L129 PetriNetUnfolder]: 26/275 cut-off events. [2021-12-28 03:08:08,758 INFO L130 PetriNetUnfolder]: For 82/93 co-relation queries the response was YES. [2021-12-28 03:08:08,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 275 events. 26/275 cut-off events. For 82/93 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 828 event pairs, 2 based on Foata normal form. 6/277 useless extension candidates. Maximal degree in co-relation 442. Up to 37 conditions per place. [2021-12-28 03:08:08,760 INFO L132 encePairwiseOnDemand]: 132/136 looper letters, 16 selfloop transitions, 7 changer transitions 3/132 dead transitions. [2021-12-28 03:08:08,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 132 transitions, 399 flow [2021-12-28 03:08:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:08:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-28 03:08:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2021-12-28 03:08:08,762 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8952205882352942 [2021-12-28 03:08:08,762 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2021-12-28 03:08:08,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2021-12-28 03:08:08,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:08,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2021-12-28 03:08:08,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:08,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:08,766 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:08,766 INFO L186 Difference]: Start difference. First operand has 135 places, 122 transitions, 318 flow. Second operand 4 states and 487 transitions. [2021-12-28 03:08:08,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 132 transitions, 399 flow [2021-12-28 03:08:08,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 132 transitions, 383 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-12-28 03:08:08,770 INFO L242 Difference]: Finished difference. Result has 130 places, 123 transitions, 336 flow [2021-12-28 03:08:08,770 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=130, PETRI_TRANSITIONS=123} [2021-12-28 03:08:08,771 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 9 predicate places. [2021-12-28 03:08:08,771 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 123 transitions, 336 flow [2021-12-28 03:08:08,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:08,772 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:08,772 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:08:08,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 03:08:08,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:08,993 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:08,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1155105201, now seen corresponding path program 1 times [2021-12-28 03:08:08,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:08,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075057278] [2021-12-28 03:08:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:08,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:09,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:09,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075057278] [2021-12-28 03:08:09,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075057278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:09,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097664491] [2021-12-28 03:08:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:09,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:09,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:09,108 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) [2021-12-28 03:08:09,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:08:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:09,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 03:08:09,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:09,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:09,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097664491] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:09,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:09,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-28 03:08:09,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166074604] [2021-12-28 03:08:09,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:09,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-28 03:08:09,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:09,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-28 03:08:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-28 03:08:09,883 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2021-12-28 03:08:09,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 123 transitions, 336 flow. Second operand has 19 states, 19 states have (on average 105.63157894736842) internal successors, (2007), 19 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:09,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:09,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2021-12-28 03:08:09,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:10,108 INFO L129 PetriNetUnfolder]: 26/315 cut-off events. [2021-12-28 03:08:10,108 INFO L130 PetriNetUnfolder]: For 212/255 co-relation queries the response was YES. [2021-12-28 03:08:10,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 315 events. 26/315 cut-off events. For 212/255 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 926 event pairs, 6 based on Foata normal form. 7/318 useless extension candidates. Maximal degree in co-relation 568. Up to 54 conditions per place. [2021-12-28 03:08:10,110 INFO L132 encePairwiseOnDemand]: 124/136 looper letters, 28 selfloop transitions, 11 changer transitions 6/137 dead transitions. [2021-12-28 03:08:10,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 137 transitions, 475 flow [2021-12-28 03:08:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 03:08:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-28 03:08:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1277 transitions. [2021-12-28 03:08:10,115 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7824754901960784 [2021-12-28 03:08:10,115 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1277 transitions. [2021-12-28 03:08:10,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1277 transitions. [2021-12-28 03:08:10,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:10,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1277 transitions. [2021-12-28 03:08:10,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:10,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:10,122 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:10,122 INFO L186 Difference]: Start difference. First operand has 130 places, 123 transitions, 336 flow. Second operand 12 states and 1277 transitions. [2021-12-28 03:08:10,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 137 transitions, 475 flow [2021-12-28 03:08:10,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 137 transitions, 459 flow, removed 8 selfloop flow, removed 1 redundant places. [2021-12-28 03:08:10,130 INFO L242 Difference]: Finished difference. Result has 144 places, 127 transitions, 385 flow [2021-12-28 03:08:10,131 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=385, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2021-12-28 03:08:10,133 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 23 predicate places. [2021-12-28 03:08:10,133 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 385 flow [2021-12-28 03:08:10,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.63157894736842) internal successors, (2007), 19 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:10,140 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:10,141 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:08:10,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:08:10,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-28 03:08:10,364 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:10,365 INFO L85 PathProgramCache]: Analyzing trace with hash -477337818, now seen corresponding path program 2 times [2021-12-28 03:08:10,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:10,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988143755] [2021-12-28 03:08:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:10,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:11,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:11,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988143755] [2021-12-28 03:08:11,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988143755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:11,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482983739] [2021-12-28 03:08:11,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:08:11,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:11,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:11,251 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) [2021-12-28 03:08:11,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:08:11,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:08:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:08:11,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-28 03:08:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:12,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-28 03:08:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:12,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:12,350 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-28 03:08:12,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2021-12-28 03:08:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:13,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482983739] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:13,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:13,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 45 [2021-12-28 03:08:13,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408334961] [2021-12-28 03:08:13,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:13,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-28 03:08:13,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:13,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-28 03:08:13,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2021-12-28 03:08:13,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 136 [2021-12-28 03:08:13,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 385 flow. Second operand has 45 states, 45 states have (on average 67.4888888888889) internal successors, (3037), 45 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:13,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:13,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 136 [2021-12-28 03:08:13,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:16,969 INFO L129 PetriNetUnfolder]: 750/2362 cut-off events. [2021-12-28 03:08:16,970 INFO L130 PetriNetUnfolder]: For 2354/2454 co-relation queries the response was YES. [2021-12-28 03:08:16,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5643 conditions, 2362 events. 750/2362 cut-off events. For 2354/2454 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18401 event pairs, 112 based on Foata normal form. 36/2308 useless extension candidates. Maximal degree in co-relation 5626. Up to 401 conditions per place. [2021-12-28 03:08:16,989 INFO L132 encePairwiseOnDemand]: 108/136 looper letters, 198 selfloop transitions, 76 changer transitions 0/329 dead transitions. [2021-12-28 03:08:16,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 329 transitions, 1794 flow [2021-12-28 03:08:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-28 03:08:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-28 03:08:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2928 transitions. [2021-12-28 03:08:16,997 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5126050420168067 [2021-12-28 03:08:16,998 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2928 transitions. [2021-12-28 03:08:16,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2928 transitions. [2021-12-28 03:08:16,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:16,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2928 transitions. [2021-12-28 03:08:17,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 69.71428571428571) internal successors, (2928), 42 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:17,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:17,015 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:17,015 INFO L186 Difference]: Start difference. First operand has 144 places, 127 transitions, 385 flow. Second operand 42 states and 2928 transitions. [2021-12-28 03:08:17,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 329 transitions, 1794 flow [2021-12-28 03:08:17,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 329 transitions, 1723 flow, removed 31 selfloop flow, removed 6 redundant places. [2021-12-28 03:08:17,050 INFO L242 Difference]: Finished difference. Result has 200 places, 191 transitions, 1073 flow [2021-12-28 03:08:17,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1073, PETRI_PLACES=200, PETRI_TRANSITIONS=191} [2021-12-28 03:08:17,051 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 79 predicate places. [2021-12-28 03:08:17,051 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 191 transitions, 1073 flow [2021-12-28 03:08:17,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 67.4888888888889) internal successors, (3037), 45 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:17,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:17,053 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:08:17,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:08:17,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:17,260 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:17,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2090966660, now seen corresponding path program 3 times [2021-12-28 03:08:17,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:17,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401825588] [2021-12-28 03:08:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:17,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:18,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401825588] [2021-12-28 03:08:18,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401825588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440834018] [2021-12-28 03:08:18,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:08:18,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:18,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:18,430 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) [2021-12-28 03:08:18,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:08:18,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-28 03:08:18,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:08:18,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:08:18,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:19,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:08:19,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 03:08:19,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-28 03:08:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 03:08:19,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:19,375 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_149 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_149) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2021-12-28 03:08:19,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 03:08:19,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2021-12-28 03:08:19,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-12-28 03:08:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 03:08:20,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440834018] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:20,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:20,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 12] total 45 [2021-12-28 03:08:20,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905374082] [2021-12-28 03:08:20,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:20,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-28 03:08:20,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:20,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-28 03:08:20,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1774, Unknown=1, NotChecked=84, Total=1980 [2021-12-28 03:08:20,035 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2021-12-28 03:08:20,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 191 transitions, 1073 flow. Second operand has 45 states, 45 states have (on average 58.48888888888889) internal successors, (2632), 45 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:20,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:20,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2021-12-28 03:08:20,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:25,468 INFO L129 PetriNetUnfolder]: 957/2920 cut-off events. [2021-12-28 03:08:25,468 INFO L130 PetriNetUnfolder]: For 15494/15830 co-relation queries the response was YES. [2021-12-28 03:08:25,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9788 conditions, 2920 events. 957/2920 cut-off events. For 15494/15830 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23632 event pairs, 76 based on Foata normal form. 182/3042 useless extension candidates. Maximal degree in co-relation 9750. Up to 541 conditions per place. [2021-12-28 03:08:25,497 INFO L132 encePairwiseOnDemand]: 110/136 looper letters, 186 selfloop transitions, 117 changer transitions 0/352 dead transitions. [2021-12-28 03:08:25,498 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 352 transitions, 2854 flow [2021-12-28 03:08:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-28 03:08:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-12-28 03:08:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2635 transitions. [2021-12-28 03:08:25,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2021-12-28 03:08:25,505 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2635 transitions. [2021-12-28 03:08:25,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2635 transitions. [2021-12-28 03:08:25,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:25,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2635 transitions. [2021-12-28 03:08:25,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 59.88636363636363) internal successors, (2635), 44 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:25,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 136.0) internal successors, (6120), 45 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:25,521 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 136.0) internal successors, (6120), 45 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:25,521 INFO L186 Difference]: Start difference. First operand has 200 places, 191 transitions, 1073 flow. Second operand 44 states and 2635 transitions. [2021-12-28 03:08:25,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 352 transitions, 2854 flow [2021-12-28 03:08:25,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 352 transitions, 2700 flow, removed 60 selfloop flow, removed 15 redundant places. [2021-12-28 03:08:25,557 INFO L242 Difference]: Finished difference. Result has 237 places, 236 transitions, 1751 flow [2021-12-28 03:08:25,558 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1751, PETRI_PLACES=237, PETRI_TRANSITIONS=236} [2021-12-28 03:08:25,560 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 116 predicate places. [2021-12-28 03:08:25,561 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 236 transitions, 1751 flow [2021-12-28 03:08:25,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 58.48888888888889) internal successors, (2632), 45 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:25,562 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:25,562 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:08:25,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:08:25,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:25,783 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:25,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash 176551504, now seen corresponding path program 1 times [2021-12-28 03:08:25,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:25,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585828782] [2021-12-28 03:08:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:25,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:27,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:27,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585828782] [2021-12-28 03:08:27,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585828782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:27,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169919303] [2021-12-28 03:08:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:27,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:27,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:27,280 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:08:27,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:08:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:27,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-28 03:08:27,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:27,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:08:27,739 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 03:08:27,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-28 03:08:28,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 03:08:29,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-28 03:08:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:29,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:30,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 03:08:30,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2021-12-28 03:08:30,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2021-12-28 03:08:32,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 03:08:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:32,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169919303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:32,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:32,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 85 [2021-12-28 03:08:32,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475313858] [2021-12-28 03:08:32,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:32,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-28 03:08:32,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-28 03:08:32,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=6623, Unknown=2, NotChecked=0, Total=7140 [2021-12-28 03:08:32,386 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2021-12-28 03:08:32,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 236 transitions, 1751 flow. Second operand has 85 states, 85 states have (on average 49.37647058823529) internal successors, (4197), 85 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:32,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:32,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2021-12-28 03:08:32,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:48,900 INFO L129 PetriNetUnfolder]: 5750/11340 cut-off events. [2021-12-28 03:08:48,901 INFO L130 PetriNetUnfolder]: For 68850/68859 co-relation queries the response was YES. [2021-12-28 03:08:49,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43797 conditions, 11340 events. 5750/11340 cut-off events. For 68850/68859 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 96386 event pairs, 367 based on Foata normal form. 13/11322 useless extension candidates. Maximal degree in co-relation 43750. Up to 2470 conditions per place. [2021-12-28 03:08:49,091 INFO L132 encePairwiseOnDemand]: 99/136 looper letters, 618 selfloop transitions, 351 changer transitions 46/1055 dead transitions. [2021-12-28 03:08:49,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1055 transitions, 9624 flow [2021-12-28 03:08:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-28 03:08:49,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-12-28 03:08:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 6341 transitions. [2021-12-28 03:08:49,105 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3853305785123967 [2021-12-28 03:08:49,105 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 6341 transitions. [2021-12-28 03:08:49,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 6341 transitions. [2021-12-28 03:08:49,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:49,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 6341 transitions. [2021-12-28 03:08:49,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 52.40495867768595) internal successors, (6341), 121 states have internal predecessors, (6341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:49,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 136.0) internal successors, (16592), 122 states have internal predecessors, (16592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:49,159 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 136.0) internal successors, (16592), 122 states have internal predecessors, (16592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:49,159 INFO L186 Difference]: Start difference. First operand has 237 places, 236 transitions, 1751 flow. Second operand 121 states and 6341 transitions. [2021-12-28 03:08:49,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1055 transitions, 9624 flow [2021-12-28 03:08:49,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1055 transitions, 9436 flow, removed 62 selfloop flow, removed 29 redundant places. [2021-12-28 03:08:49,423 INFO L242 Difference]: Finished difference. Result has 370 places, 535 transitions, 5321 flow [2021-12-28 03:08:49,423 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=5321, PETRI_PLACES=370, PETRI_TRANSITIONS=535} [2021-12-28 03:08:49,424 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 249 predicate places. [2021-12-28 03:08:49,424 INFO L470 AbstractCegarLoop]: Abstraction has has 370 places, 535 transitions, 5321 flow [2021-12-28 03:08:49,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 49.37647058823529) internal successors, (4197), 85 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:49,426 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:49,426 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:08:49,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:08:49,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:49,651 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1651370038, now seen corresponding path program 2 times [2021-12-28 03:08:49,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:49,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978023574] [2021-12-28 03:08:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:49,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:50,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:50,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978023574] [2021-12-28 03:08:50,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978023574] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:50,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088156618] [2021-12-28 03:08:50,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:08:50,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:50,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:50,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:08:50,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:08:50,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:08:50,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:08:50,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-28 03:08:50,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:52,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:08:52,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 03:08:52,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-28 03:08:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:53,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:53,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 03:08:53,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2021-12-28 03:08:53,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2021-12-28 03:08:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:55,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088156618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:55,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:55,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 87 [2021-12-28 03:08:55,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754783887] [2021-12-28 03:08:55,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:55,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-28 03:08:55,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-28 03:08:55,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=6886, Unknown=5, NotChecked=0, Total=7482 [2021-12-28 03:08:55,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 136 [2021-12-28 03:08:55,708 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 535 transitions, 5321 flow. Second operand has 87 states, 87 states have (on average 48.37931034482759) internal successors, (4209), 87 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:55,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:55,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 136 [2021-12-28 03:08:55,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand