./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/qw2004-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-lit/qw2004-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 511c6dfc7d5bd28721d42de204124e2d16d0e544 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:03:17,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:03:17,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:03:17,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:03:17,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:03:17,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:03:17,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:03:17,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:03:17,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:03:17,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:03:17,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:03:17,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:03:17,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:03:17,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:03:17,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:03:17,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:03:17,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:03:17,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:03:17,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:03:17,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:03:17,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:03:17,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:03:17,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:03:17,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:03:17,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:03:17,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:03:17,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:03:17,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:03:17,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:03:18,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:03:18,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:03:18,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:03:18,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:03:18,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:03:18,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:03:18,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:03:18,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:03:18,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:03:18,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:03:18,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:03:18,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:03:18,006 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:03:18,019 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:03:18,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:03:18,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:03:18,021 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:03:18,021 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:03:18,021 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:03:18,021 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:03:18,021 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:03:18,021 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:03:18,022 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:03:18,022 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:03:18,022 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:03:18,022 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:03:18,022 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:03:18,023 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:03:18,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:03:18,023 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:03:18,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:03:18,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:03:18,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:03:18,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:03:18,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:03:18,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:03:18,025 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:03:18,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:03:18,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:03:18,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:03:18,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:03:18,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:03:18,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:03:18,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:03:18,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:03:18,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:03:18,027 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:03:18,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:03:18,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:03:18,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:03:18,027 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan 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 -> 511c6dfc7d5bd28721d42de204124e2d16d0e544 [2019-11-26 02:03:18,183 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:03:18,193 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:03:18,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:03:18,197 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:03:18,198 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:03:18,198 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/../../sv-benchmarks/c/pthread-lit/qw2004-2.i [2019-11-26 02:03:18,255 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/data/692c111db/50a4627192a34394b191f106edc33177/FLAGa73a8ea88 [2019-11-26 02:03:18,738 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:03:18,738 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/sv-benchmarks/c/pthread-lit/qw2004-2.i [2019-11-26 02:03:18,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/data/692c111db/50a4627192a34394b191f106edc33177/FLAGa73a8ea88 [2019-11-26 02:03:19,267 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/data/692c111db/50a4627192a34394b191f106edc33177 [2019-11-26 02:03:19,269 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:03:19,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:03:19,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:03:19,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:03:19,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:03:19,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:03:19" (1/1) ... [2019-11-26 02:03:19,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5388ff6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19, skipping insertion in model container [2019-11-26 02:03:19,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:03:19" (1/1) ... [2019-11-26 02:03:19,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:03:19,346 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:03:19,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:03:19,771 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:03:19,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:03:19,908 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:03:19,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19 WrapperNode [2019-11-26 02:03:19,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:03:19,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:03:19,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:03:19,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:03:19,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19" (1/1) ... [2019-11-26 02:03:19,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19" (1/1) ... [2019-11-26 02:03:19,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:03:19,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:03:19,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:03:19,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:03:19,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19" (1/1) ... [2019-11-26 02:03:19,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19" (1/1) ... [2019-11-26 02:03:19,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19" (1/1) ... [2019-11-26 02:03:19,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19" (1/1) ... [2019-11-26 02:03:19,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19" (1/1) ... [2019-11-26 02:03:19,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19" (1/1) ... [2019-11-26 02:03:19,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19" (1/1) ... [2019-11-26 02:03:19,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:03:19,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:03:19,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:03:19,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:03:19,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:03:20,070 INFO L130 BoogieDeclarations]: Found specification of procedure BCSP_PnpStop [2019-11-26 02:03:20,072 INFO L138 BoogieDeclarations]: Found implementation of procedure BCSP_PnpStop [2019-11-26 02:03:20,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:03:20,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-11-26 02:03:20,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:03:20,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:03:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-11-26 02:03:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:03:20,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:03:20,075 WARN L202 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-11-26 02:03:20,420 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:03:20,420 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-26 02:03:20,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:03:20 BoogieIcfgContainer [2019-11-26 02:03:20,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:03:20,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:03:20,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:03:20,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:03:20,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:03:19" (1/3) ... [2019-11-26 02:03:20,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d22b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:03:20, skipping insertion in model container [2019-11-26 02:03:20,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:03:19" (2/3) ... [2019-11-26 02:03:20,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d22b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:03:20, skipping insertion in model container [2019-11-26 02:03:20,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:03:20" (3/3) ... [2019-11-26 02:03:20,428 INFO L109 eAbstractionObserver]: Analyzing ICFG qw2004-2.i [2019-11-26 02:03:20,465 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,465 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,465 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,465 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,466 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,466 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,466 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,466 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,467 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_dec_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,467 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of3ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,467 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of3ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,467 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,467 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,467 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,468 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,468 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,468 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,468 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,468 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,469 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,469 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,469 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,469 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,470 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,470 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,470 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,470 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,470 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread3of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,470 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread3of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,471 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,471 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_dec_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,471 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread3of3ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,471 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread3of3ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,471 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,472 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,472 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,472 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,472 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,472 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread3of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,472 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,473 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread3of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,473 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread3of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,473 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,473 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,474 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,474 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,474 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,474 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,474 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,475 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread2of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,475 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread2of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,475 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,475 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_dec_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,475 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread2of3ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,475 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread2of3ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,476 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,476 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,476 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,476 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,476 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,476 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread2of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,477 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_BCSP_IoDecrement_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,477 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread2of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,477 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread2of3ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,477 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,477 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-26 02:03:20,486 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-11-26 02:03:20,486 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:03:20,491 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:03:20,498 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:03:20,514 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:03:20,514 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:03:20,514 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:03:20,514 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:03:20,514 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:03:20,514 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:03:20,514 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:03:20,515 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:03:20,526 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 118 places, 117 transitions [2019-11-26 02:03:20,608 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 772 states. [2019-11-26 02:03:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states. [2019-11-26 02:03:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-26 02:03:20,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:03:20,624 INFO L410 BasicCegarLoop]: 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] [2019-11-26 02:03:20,625 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:03:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:03:20,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1891578487, now seen corresponding path program 1 times [2019-11-26 02:03:20,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:03:20,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6025896] [2019-11-26 02:03:20,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:03:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:03:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:03:20,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6025896] [2019-11-26 02:03:20,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:03:20,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:03:20,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827958839] [2019-11-26 02:03:20,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:03:20,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:03:20,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:03:20,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:03:20,840 INFO L87 Difference]: Start difference. First operand 772 states. Second operand 3 states. [2019-11-26 02:03:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:03:20,908 INFO L93 Difference]: Finished difference Result 1298 states and 2630 transitions. [2019-11-26 02:03:20,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:03:20,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2019-11-26 02:03:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:03:20,937 INFO L225 Difference]: With dead ends: 1298 [2019-11-26 02:03:20,940 INFO L226 Difference]: Without dead ends: 618 [2019-11-26 02:03:20,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:03:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-11-26 02:03:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 410. [2019-11-26 02:03:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2019-11-26 02:03:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 802 transitions. [2019-11-26 02:03:21,011 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 802 transitions. Word has length 35 [2019-11-26 02:03:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:03:21,011 INFO L462 AbstractCegarLoop]: Abstraction has 410 states and 802 transitions. [2019-11-26 02:03:21,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:03:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 802 transitions. [2019-11-26 02:03:21,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-26 02:03:21,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:03:21,015 INFO L410 BasicCegarLoop]: 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] [2019-11-26 02:03:21,015 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:03:21,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:03:21,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1726993777, now seen corresponding path program 1 times [2019-11-26 02:03:21,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:03:21,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100826336] [2019-11-26 02:03:21,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:03:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:03:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:03:21,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100826336] [2019-11-26 02:03:21,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:03:21,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:03:21,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68644533] [2019-11-26 02:03:21,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:03:21,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:03:21,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:03:21,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:03:21,129 INFO L87 Difference]: Start difference. First operand 410 states and 802 transitions. Second operand 5 states. [2019-11-26 02:03:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:03:21,217 INFO L93 Difference]: Finished difference Result 389 states and 752 transitions. [2019-11-26 02:03:21,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:03:21,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-11-26 02:03:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:03:21,221 INFO L225 Difference]: With dead ends: 389 [2019-11-26 02:03:21,221 INFO L226 Difference]: Without dead ends: 335 [2019-11-26 02:03:21,221 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:03:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2019-11-26 02:03:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2019-11-26 02:03:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2019-11-26 02:03:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 647 transitions. [2019-11-26 02:03:21,254 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 647 transitions. Word has length 36 [2019-11-26 02:03:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:03:21,255 INFO L462 AbstractCegarLoop]: Abstraction has 335 states and 647 transitions. [2019-11-26 02:03:21,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:03:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 647 transitions. [2019-11-26 02:03:21,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-26 02:03:21,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:03:21,262 INFO L410 BasicCegarLoop]: 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] [2019-11-26 02:03:21,262 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:03:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:03:21,262 INFO L82 PathProgramCache]: Analyzing trace with hash -796570653, now seen corresponding path program 1 times [2019-11-26 02:03:21,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:03:21,263 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639783] [2019-11-26 02:03:21,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:03:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:03:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:03:21,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639783] [2019-11-26 02:03:21,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:03:21,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:03:21,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987933481] [2019-11-26 02:03:21,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:03:21,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:03:21,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:03:21,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:03:21,370 INFO L87 Difference]: Start difference. First operand 335 states and 647 transitions. Second operand 3 states. [2019-11-26 02:03:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:03:21,378 INFO L93 Difference]: Finished difference Result 352 states and 664 transitions. [2019-11-26 02:03:21,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:03:21,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2019-11-26 02:03:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:03:21,381 INFO L225 Difference]: With dead ends: 352 [2019-11-26 02:03:21,381 INFO L226 Difference]: Without dead ends: 335 [2019-11-26 02:03:21,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:03:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2019-11-26 02:03:21,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2019-11-26 02:03:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2019-11-26 02:03:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 630 transitions. [2019-11-26 02:03:21,392 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 630 transitions. Word has length 49 [2019-11-26 02:03:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:03:21,393 INFO L462 AbstractCegarLoop]: Abstraction has 335 states and 630 transitions. [2019-11-26 02:03:21,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:03:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 630 transitions. [2019-11-26 02:03:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-26 02:03:21,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:03:21,395 INFO L410 BasicCegarLoop]: 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] [2019-11-26 02:03:21,395 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:03:21,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:03:21,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1669087786, now seen corresponding path program 1 times [2019-11-26 02:03:21,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:03:21,396 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714871714] [2019-11-26 02:03:21,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:03:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:03:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:03:21,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714871714] [2019-11-26 02:03:21,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:03:21,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:03:21,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552724985] [2019-11-26 02:03:21,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:03:21,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:03:21,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:03:21,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:03:21,445 INFO L87 Difference]: Start difference. First operand 335 states and 630 transitions. Second operand 5 states. [2019-11-26 02:03:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:03:21,505 INFO L93 Difference]: Finished difference Result 415 states and 769 transitions. [2019-11-26 02:03:21,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:03:21,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2019-11-26 02:03:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:03:21,508 INFO L225 Difference]: With dead ends: 415 [2019-11-26 02:03:21,508 INFO L226 Difference]: Without dead ends: 319 [2019-11-26 02:03:21,509 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:03:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-11-26 02:03:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2019-11-26 02:03:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-11-26 02:03:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 583 transitions. [2019-11-26 02:03:21,523 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 583 transitions. Word has length 50 [2019-11-26 02:03:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:03:21,524 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 583 transitions. [2019-11-26 02:03:21,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:03:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 583 transitions. [2019-11-26 02:03:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-26 02:03:21,526 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:03:21,526 INFO L410 BasicCegarLoop]: 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] [2019-11-26 02:03:21,527 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:03:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:03:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2084038728, now seen corresponding path program 1 times [2019-11-26 02:03:21,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:03:21,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138582235] [2019-11-26 02:03:21,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:03:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:03:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:03:21,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138582235] [2019-11-26 02:03:21,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:03:21,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:03:21,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450189511] [2019-11-26 02:03:21,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:03:21,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:03:21,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:03:21,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:03:21,578 INFO L87 Difference]: Start difference. First operand 319 states and 583 transitions. Second operand 3 states. [2019-11-26 02:03:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:03:21,586 INFO L93 Difference]: Finished difference Result 319 states and 567 transitions. [2019-11-26 02:03:21,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:03:21,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2019-11-26 02:03:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:03:21,588 INFO L225 Difference]: With dead ends: 319 [2019-11-26 02:03:21,588 INFO L226 Difference]: Without dead ends: 191 [2019-11-26 02:03:21,588 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:03:21,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-26 02:03:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2019-11-26 02:03:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-11-26 02:03:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 327 transitions. [2019-11-26 02:03:21,595 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 327 transitions. Word has length 51 [2019-11-26 02:03:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:03:21,595 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 327 transitions. [2019-11-26 02:03:21,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:03:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 327 transitions. [2019-11-26 02:03:21,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-26 02:03:21,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:03:21,597 INFO L410 BasicCegarLoop]: 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] [2019-11-26 02:03:21,597 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:03:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:03:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2077185754, now seen corresponding path program 2 times [2019-11-26 02:03:21,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:03:21,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465015352] [2019-11-26 02:03:21,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:03:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:03:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:03:21,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465015352] [2019-11-26 02:03:21,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:03:21,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-26 02:03:21,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749142870] [2019-11-26 02:03:21,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:03:21,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:03:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:03:21,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:03:21,719 INFO L87 Difference]: Start difference. First operand 191 states and 327 transitions. Second operand 8 states. [2019-11-26 02:03:21,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:03:21,839 INFO L93 Difference]: Finished difference Result 233 states and 398 transitions. [2019-11-26 02:03:21,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:03:21,839 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-11-26 02:03:21,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:03:21,841 INFO L225 Difference]: With dead ends: 233 [2019-11-26 02:03:21,841 INFO L226 Difference]: Without dead ends: 149 [2019-11-26 02:03:21,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:03:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-26 02:03:21,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2019-11-26 02:03:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-11-26 02:03:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 243 transitions. [2019-11-26 02:03:21,848 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 243 transitions. Word has length 51 [2019-11-26 02:03:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:03:21,849 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 243 transitions. [2019-11-26 02:03:21,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:03:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 243 transitions. [2019-11-26 02:03:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-26 02:03:21,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:03:21,851 INFO L410 BasicCegarLoop]: 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] [2019-11-26 02:03:21,851 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:03:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:03:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1201046156, now seen corresponding path program 3 times [2019-11-26 02:03:21,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:03:21,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240845985] [2019-11-26 02:03:21,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:03:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:03:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:03:21,930 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:03:21,930 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:03:22,007 INFO L304 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2019-11-26 02:03:22,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:03:22 BasicIcfg [2019-11-26 02:03:22,011 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:03:22,011 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:03:22,011 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:03:22,011 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:03:22,012 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:03:20" (3/4) ... [2019-11-26 02:03:22,015 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:03:22,108 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_309a73d9-5ff0-46fa-8eaf-a849e1f6dc70/bin/utaipan/witness.graphml [2019-11-26 02:03:22,108 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:03:22,110 INFO L168 Benchmark]: Toolchain (without parser) took 2839.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 939.4 MB in the beginning and 903.0 MB in the end (delta: 36.4 MB). Peak memory consumption was 167.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:03:22,111 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:03:22,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -158.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:03:22,112 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:03:22,112 INFO L168 Benchmark]: Boogie Preprocessor took 43.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:03:22,113 INFO L168 Benchmark]: RCFGBuilder took 428.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:03:22,114 INFO L168 Benchmark]: TraceAbstraction took 1587.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 913.7 MB in the end (delta: 155.8 MB). Peak memory consumption was 155.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:03:22,114 INFO L168 Benchmark]: Witness Printer took 97.34 ms. Allocated memory is still 1.2 GB. Free memory was 913.7 MB in the beginning and 903.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:03:22,117 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 637.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -158.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 43.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 428.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1587.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 913.7 MB in the end (delta: 155.8 MB). Peak memory consumption was 155.8 MB. Max. memory is 11.5 GB. * Witness Printer took 97.34 ms. Allocated memory is still 1.2 GB. Free memory was 913.7 MB in the beginning and 903.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 676]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L683] 0 volatile int stoppingFlag; VAL [stoppingFlag=0] [L684] 0 volatile int pendingIo; VAL [pendingIo=0, stoppingFlag=0] [L685] 0 volatile int stoppingEvent; VAL [pendingIo=0, stoppingEvent=0, stoppingFlag=0] [L686] 0 volatile int stopped; VAL [pendingIo=0, stopped=0, stoppingEvent=0, stoppingFlag=0] [L726] 0 pthread_t t; VAL [pendingIo=0, stopped=0, stoppingEvent=0, stoppingFlag=0] [L727] 0 pendingIo = 1 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L728] 0 stoppingFlag = 0 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L729] 0 stoppingEvent = 0 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L730] 0 stopped = 0 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L731] FCALL, FORK 0 pthread_create(&t, 0, BCSP_PnpStop, 0) VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L710] 0 int status; VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L688] COND FALSE 0 !(\read(stoppingFlag)) VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L719] 1 stoppingFlag = 1 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L703] 1 int pending; VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L697] 1 pendingIo-- [L698] 1 int tmp = pendingIo; VAL [pendingIo=0, stopped=0, stoppingEvent=0, stoppingFlag=1] [L691] 0 pendingIo = pendingIo + 1 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L693] 0 return 0; VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L711] 0 status = BCSP_IoIncrement() VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L712] COND TRUE 0 status == 0 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L700] 1 return tmp; VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L704] 1 pending = dec() VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L705] COND TRUE 1 pending == 0 VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=1] [L706] 1 stoppingEvent = 1 VAL [pendingIo=1, stopped=0, stoppingEvent=1, stoppingFlag=1] [L722] 1 stopped = 1 VAL [pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] [L675] COND TRUE 0 !(cond) VAL [pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] [L676] 0 __VERIFIER_error() VAL [pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 130 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.4s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 488 SDtfs, 267 SDslu, 866 SDs, 0 SdLazy, 96 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=772occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 208 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 323 NumberOfCodeBlocks, 323 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 266 ConstructedInterpolants, 0 QuantifiedInterpolants, 22937 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...