./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/dekker.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/dekker.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/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 f6cb963e1fbb040f542eba054f6a77048b7f932a .......................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 21:48:05,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 21:48:05,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 21:48:05,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 21:48:05,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 21:48:05,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 21:48:05,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 21:48:05,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 21:48:05,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 21:48:05,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 21:48:05,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 21:48:05,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 21:48:05,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 21:48:05,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 21:48:05,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 21:48:05,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 21:48:05,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 21:48:05,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 21:48:05,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 21:48:05,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 21:48:05,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 21:48:05,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 21:48:05,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 21:48:05,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 21:48:05,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 21:48:05,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 21:48:05,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 21:48:05,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 21:48:05,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 21:48:05,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 21:48:05,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 21:48:05,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 21:48:05,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 21:48:05,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 21:48:05,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 21:48:05,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 21:48:06,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 21:48:06,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 21:48:06,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 21:48:06,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 21:48:06,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 21:48:06,002 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 21:48:06,013 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 21:48:06,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 21:48:06,014 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 21:48:06,014 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 21:48:06,014 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 21:48:06,014 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 21:48:06,014 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 21:48:06,014 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 21:48:06,014 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 21:48:06,014 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 21:48:06,015 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 21:48:06,015 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 21:48:06,015 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 21:48:06,015 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 21:48:06,015 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 21:48:06,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 21:48:06,016 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 21:48:06,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 21:48:06,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 21:48:06,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 21:48:06,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 21:48:06,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 21:48:06,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 21:48:06,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 21:48:06,017 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 21:48:06,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 21:48:06,017 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 21:48:06,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 21:48:06,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 21:48:06,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 21:48:06,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 21:48:06,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:48:06,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 21:48:06,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 21:48:06,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 21:48:06,018 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 21:48:06,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 21:48:06,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 21:48:06,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 21:48:06,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 21:48:06,018 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_4a3c260b-f2c7-4ba7-b148-c6556f627134/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 -> f6cb963e1fbb040f542eba054f6a77048b7f932a [2019-12-07 21:48:06,116 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 21:48:06,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 21:48:06,129 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 21:48:06,130 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 21:48:06,131 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 21:48:06,131 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/bin/utaipan/../../sv-benchmarks/c/pthread-atomic/dekker.i [2019-12-07 21:48:06,170 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/bin/utaipan/data/cb412441c/1a1a4c51918443fc92709e1bb706654b/FLAG362e7eab8 [2019-12-07 21:48:06,621 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 21:48:06,622 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/sv-benchmarks/c/pthread-atomic/dekker.i [2019-12-07 21:48:06,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/bin/utaipan/data/cb412441c/1a1a4c51918443fc92709e1bb706654b/FLAG362e7eab8 [2019-12-07 21:48:06,640 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/bin/utaipan/data/cb412441c/1a1a4c51918443fc92709e1bb706654b [2019-12-07 21:48:06,642 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 21:48:06,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 21:48:06,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 21:48:06,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 21:48:06,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 21:48:06,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:48:06" (1/1) ... [2019-12-07 21:48:06,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3357ba65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06, skipping insertion in model container [2019-12-07 21:48:06,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:48:06" (1/1) ... [2019-12-07 21:48:06,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 21:48:06,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 21:48:06,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:48:06,909 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 21:48:06,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:48:06,981 INFO L208 MainTranslator]: Completed translation [2019-12-07 21:48:06,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06 WrapperNode [2019-12-07 21:48:06,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 21:48:06,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 21:48:06,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 21:48:06,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 21:48:06,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06" (1/1) ... [2019-12-07 21:48:06,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06" (1/1) ... [2019-12-07 21:48:07,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 21:48:07,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 21:48:07,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 21:48:07,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 21:48:07,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06" (1/1) ... [2019-12-07 21:48:07,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06" (1/1) ... [2019-12-07 21:48:07,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06" (1/1) ... [2019-12-07 21:48:07,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06" (1/1) ... [2019-12-07 21:48:07,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06" (1/1) ... [2019-12-07 21:48:07,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06" (1/1) ... [2019-12-07 21:48:07,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06" (1/1) ... [2019-12-07 21:48:07,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 21:48:07,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 21:48:07,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 21:48:07,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 21:48:07,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/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 [2019-12-07 21:48:07,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 21:48:07,076 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2019-12-07 21:48:07,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2019-12-07 21:48:07,076 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2019-12-07 21:48:07,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2019-12-07 21:48:07,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 21:48:07,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 21:48:07,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 21:48:07,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 21:48:07,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 21:48:07,078 WARN L205 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-07 21:48:07,259 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 21:48:07,259 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 21:48:07,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:48:07 BoogieIcfgContainer [2019-12-07 21:48:07,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 21:48:07,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 21:48:07,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 21:48:07,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 21:48:07,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:48:06" (1/3) ... [2019-12-07 21:48:07,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db9d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:48:07, skipping insertion in model container [2019-12-07 21:48:07,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:48:06" (2/3) ... [2019-12-07 21:48:07,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db9d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:48:07, skipping insertion in model container [2019-12-07 21:48:07,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:48:07" (3/3) ... [2019-12-07 21:48:07,264 INFO L109 eAbstractionObserver]: Analyzing ICFG dekker.i [2019-12-07 21:48:07,271 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-07 21:48:07,271 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 21:48:07,274 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-12-07 21:48:07,275 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-07 21:48:07,292 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,293 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,293 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,293 WARN L315 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,294 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,294 WARN L315 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,295 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,295 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,295 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,295 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,296 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,296 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 21:48:07,315 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-12-07 21:48:07,329 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 21:48:07,329 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 21:48:07,329 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 21:48:07,329 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 21:48:07,329 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 21:48:07,329 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 21:48:07,329 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 21:48:07,329 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 21:48:07,338 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 77 transitions [2019-12-07 21:48:07,339 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 70 places, 77 transitions [2019-12-07 21:48:07,374 INFO L134 PetriNetUnfolder]: 13/77 cut-off events. [2019-12-07 21:48:07,374 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 21:48:07,378 INFO L76 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 77 events. 13/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 175 event pairs. 19/82 useless extension candidates. Maximal degree in co-relation 53. Up to 3 conditions per place. [2019-12-07 21:48:07,381 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 70 places, 77 transitions [2019-12-07 21:48:07,392 INFO L134 PetriNetUnfolder]: 13/77 cut-off events. [2019-12-07 21:48:07,392 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 21:48:07,393 INFO L76 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 77 events. 13/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 175 event pairs. 19/82 useless extension candidates. Maximal degree in co-relation 53. Up to 3 conditions per place. [2019-12-07 21:48:07,394 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1428 [2019-12-07 21:48:07,395 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-07 21:48:08,020 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3136 [2019-12-07 21:48:08,021 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-07 21:48:08,023 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 45 transitions [2019-12-07 21:48:08,046 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 335 states. [2019-12-07 21:48:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states. [2019-12-07 21:48:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 21:48:08,052 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:48:08,052 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 21:48:08,053 INFO L410 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:48:08,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:48:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash 307755311, now seen corresponding path program 1 times [2019-12-07 21:48:08,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:48:08,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664163343] [2019-12-07 21:48:08,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:48:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:48:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:48:08,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664163343] [2019-12-07 21:48:08,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:48:08,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 21:48:08,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187173848] [2019-12-07 21:48:08,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 21:48:08,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:48:08,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 21:48:08,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 21:48:08,172 INFO L87 Difference]: Start difference. First operand 335 states. Second operand 2 states. [2019-12-07 21:48:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:48:08,194 INFO L93 Difference]: Finished difference Result 335 states and 891 transitions. [2019-12-07 21:48:08,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 21:48:08,195 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-12-07 21:48:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:48:08,209 INFO L225 Difference]: With dead ends: 335 [2019-12-07 21:48:08,209 INFO L226 Difference]: Without dead ends: 296 [2019-12-07 21:48:08,210 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 21:48:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-12-07 21:48:08,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2019-12-07 21:48:08,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-12-07 21:48:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 806 transitions. [2019-12-07 21:48:08,263 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 806 transitions. Word has length 5 [2019-12-07 21:48:08,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:48:08,264 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 806 transitions. [2019-12-07 21:48:08,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 21:48:08,264 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 806 transitions. [2019-12-07 21:48:08,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 21:48:08,264 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:48:08,264 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 21:48:08,265 INFO L410 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:48:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:48:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash 950440607, now seen corresponding path program 1 times [2019-12-07 21:48:08,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:48:08,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505321932] [2019-12-07 21:48:08,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:48:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:48:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:48:08,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505321932] [2019-12-07 21:48:08,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:48:08,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 21:48:08,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9127189] [2019-12-07 21:48:08,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:48:08,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:48:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:48:08,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:48:08,309 INFO L87 Difference]: Start difference. First operand 296 states and 806 transitions. Second operand 3 states. [2019-12-07 21:48:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:48:08,336 INFO L93 Difference]: Finished difference Result 313 states and 813 transitions. [2019-12-07 21:48:08,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:48:08,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 21:48:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:48:08,340 INFO L225 Difference]: With dead ends: 313 [2019-12-07 21:48:08,340 INFO L226 Difference]: Without dead ends: 250 [2019-12-07 21:48:08,341 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:48:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-12-07 21:48:08,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 232. [2019-12-07 21:48:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-12-07 21:48:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 621 transitions. [2019-12-07 21:48:08,362 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 621 transitions. Word has length 6 [2019-12-07 21:48:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:48:08,363 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 621 transitions. [2019-12-07 21:48:08,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:48:08,363 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 621 transitions. [2019-12-07 21:48:08,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 21:48:08,364 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:48:08,364 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:48:08,365 INFO L410 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:48:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:48:08,365 INFO L82 PathProgramCache]: Analyzing trace with hash -863522724, now seen corresponding path program 1 times [2019-12-07 21:48:08,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:48:08,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468611871] [2019-12-07 21:48:08,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:48:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:48:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:48:08,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468611871] [2019-12-07 21:48:08,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:48:08,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 21:48:08,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017242507] [2019-12-07 21:48:08,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:48:08,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:48:08,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:48:08,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:48:08,407 INFO L87 Difference]: Start difference. First operand 232 states and 621 transitions. Second operand 3 states. [2019-12-07 21:48:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:48:08,422 INFO L93 Difference]: Finished difference Result 225 states and 583 transitions. [2019-12-07 21:48:08,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:48:08,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-12-07 21:48:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:48:08,424 INFO L225 Difference]: With dead ends: 225 [2019-12-07 21:48:08,424 INFO L226 Difference]: Without dead ends: 156 [2019-12-07 21:48:08,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:48:08,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-07 21:48:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2019-12-07 21:48:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-07 21:48:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 408 transitions. [2019-12-07 21:48:08,433 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 408 transitions. Word has length 8 [2019-12-07 21:48:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:48:08,433 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 408 transitions. [2019-12-07 21:48:08,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:48:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 408 transitions. [2019-12-07 21:48:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 21:48:08,435 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:48:08,435 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:48:08,435 INFO L410 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:48:08,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:48:08,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1690923042, now seen corresponding path program 1 times [2019-12-07 21:48:08,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:48:08,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642055156] [2019-12-07 21:48:08,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:48:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:48:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:48:08,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642055156] [2019-12-07 21:48:08,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:48:08,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 21:48:08,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681838069] [2019-12-07 21:48:08,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:48:08,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:48:08,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:48:08,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:48:08,467 INFO L87 Difference]: Start difference. First operand 156 states and 408 transitions. Second operand 3 states. [2019-12-07 21:48:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:48:08,478 INFO L93 Difference]: Finished difference Result 156 states and 398 transitions. [2019-12-07 21:48:08,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:48:08,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-12-07 21:48:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:48:08,480 INFO L225 Difference]: With dead ends: 156 [2019-12-07 21:48:08,480 INFO L226 Difference]: Without dead ends: 136 [2019-12-07 21:48:08,480 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 [2019-12-07 21:48:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-12-07 21:48:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2019-12-07 21:48:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-07 21:48:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 340 transitions. [2019-12-07 21:48:08,486 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 340 transitions. Word has length 11 [2019-12-07 21:48:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:48:08,487 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 340 transitions. [2019-12-07 21:48:08,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:48:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 340 transitions. [2019-12-07 21:48:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 21:48:08,488 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:48:08,488 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:48:08,488 INFO L410 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:48:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:48:08,488 INFO L82 PathProgramCache]: Analyzing trace with hash -535888112, now seen corresponding path program 2 times [2019-12-07 21:48:08,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:48:08,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765851776] [2019-12-07 21:48:08,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:48:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:48:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:48:08,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765851776] [2019-12-07 21:48:08,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:48:08,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 21:48:08,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252898788] [2019-12-07 21:48:08,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:48:08,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:48:08,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:48:08,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:48:08,514 INFO L87 Difference]: Start difference. First operand 136 states and 340 transitions. Second operand 3 states. [2019-12-07 21:48:08,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:48:08,523 INFO L93 Difference]: Finished difference Result 86 states and 251 transitions. [2019-12-07 21:48:08,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:48:08,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-12-07 21:48:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:48:08,524 INFO L225 Difference]: With dead ends: 86 [2019-12-07 21:48:08,524 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 21:48:08,524 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 [2019-12-07 21:48:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 21:48:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 21:48:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 21:48:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 21:48:08,525 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2019-12-07 21:48:08,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:48:08,525 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 21:48:08,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:48:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 21:48:08,525 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 21:48:08,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 09:48:08 BasicIcfg [2019-12-07 21:48:08,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 21:48:08,528 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 21:48:08,528 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 21:48:08,528 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 21:48:08,529 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:48:07" (3/4) ... [2019-12-07 21:48:08,531 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 21:48:08,536 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr2 [2019-12-07 21:48:08,536 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2019-12-07 21:48:08,538 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-12-07 21:48:08,538 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 21:48:08,539 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 21:48:08,564 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4a3c260b-f2c7-4ba7-b148-c6556f627134/bin/utaipan/witness.graphml [2019-12-07 21:48:08,564 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 21:48:08,565 INFO L168 Benchmark]: Toolchain (without parser) took 1921.54 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 934.0 MB in the beginning and 832.8 MB in the end (delta: 101.1 MB). Peak memory consumption was 194.5 MB. Max. memory is 11.5 GB. [2019-12-07 21:48:08,566 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:48:08,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 934.0 MB in the beginning and 1.1 GB in the end (delta: -132.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-12-07 21:48:08,566 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 21:48:08,567 INFO L168 Benchmark]: Boogie Preprocessor took 19.55 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:48:08,567 INFO L168 Benchmark]: RCFGBuilder took 228.08 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. [2019-12-07 21:48:08,567 INFO L168 Benchmark]: TraceAbstraction took 1267.41 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 836.1 MB in the end (delta: 196.3 MB). Peak memory consumption was 196.3 MB. Max. memory is 11.5 GB. [2019-12-07 21:48:08,568 INFO L168 Benchmark]: Witness Printer took 35.61 ms. Allocated memory is still 1.1 GB. Free memory was 836.1 MB in the beginning and 832.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2019-12-07 21:48:08,570 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 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 337.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 934.0 MB in the beginning and 1.1 GB in the end (delta: -132.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.55 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 228.08 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1267.41 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 836.1 MB in the end (delta: 196.3 MB). Peak memory consumption was 196.3 MB. Max. memory is 11.5 GB. * Witness Printer took 35.61 ms. Allocated memory is still 1.1 GB. Free memory was 836.1 MB in the beginning and 832.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.6s, 70 ProgramPointsBefore, 39 ProgramPointsAfterwards, 77 TransitionsBefore, 45 TransitionsAfterwards, 1428 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 605 VarBasedMoverChecksPositive, 60 VarBasedMoverChecksNegative, 39 SemBasedMoverChecksPositive, 29 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 3136 CheckedPairsTotal, 41 TotalNumberOfCompositions - PositiveResult [Line: 702]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 687]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 64 locations, 2 error locations. Result: SAFE, OverallTime: 1.1s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 82 SDslu, 68 SDs, 0 SdLazy, 28 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=335occurred 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: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 454 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 correct! Received shutdown request...