./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/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 7a44ec3fe14113a3aba74e37fda369041ad122ce .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/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 7a44ec3fe14113a3aba74e37fda369041ad122ce .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 22:47:49,883 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 22:47:49,884 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 22:47:49,890 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 22:47:49,890 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 22:47:49,890 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 22:47:49,891 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 22:47:49,892 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 22:47:49,892 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 22:47:49,893 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 22:47:49,893 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 22:47:49,894 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 22:47:49,894 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 22:47:49,894 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 22:47:49,895 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 22:47:49,895 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 22:47:49,896 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 22:47:49,896 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 22:47:49,897 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 22:47:49,898 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 22:47:49,899 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 22:47:49,899 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 22:47:49,900 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 22:47:49,900 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 22:47:49,901 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 22:47:49,901 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 22:47:49,902 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 22:47:49,902 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 22:47:49,902 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 22:47:49,903 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 22:47:49,903 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 22:47:49,903 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 22:47:49,903 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 22:47:49,904 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 22:47:49,904 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 22:47:49,904 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 22:47:49,905 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-01 22:47:49,911 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 22:47:49,912 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 22:47:49,912 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 22:47:49,912 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 22:47:49,912 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-01 22:47:49,912 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-01 22:47:49,912 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-01 22:47:49,912 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-01 22:47:49,913 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-01 22:47:49,913 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-01 22:47:49,913 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-01 22:47:49,913 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-01 22:47:49,913 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-01 22:47:49,913 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 22:47:49,913 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 22:47:49,913 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 22:47:49,914 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 22:47:49,914 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 22:47:49,914 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 22:47:49,914 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 22:47:49,914 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 22:47:49,914 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 22:47:49,914 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 22:47:49,914 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 22:47:49,914 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 22:47:49,914 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 22:47:49,914 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 22:47:49,914 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 22:47:49,915 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 22:47:49,915 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 22:47:49,915 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 22:47:49,915 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 22:47:49,915 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-01 22:47:49,915 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 22:47:49,915 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 22:47:49,915 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-01 22:47:49,915 INFO L133 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/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/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 -> 7a44ec3fe14113a3aba74e37fda369041ad122ce [2018-12-01 22:47:49,932 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 22:47:49,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 22:47:49,941 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 22:47:49,942 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 22:47:49,942 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 22:47:49,942 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/../../sv-benchmarks/c/pthread-atomic/read_write_lock_false-unreach-call.i [2018-12-01 22:47:49,975 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/data/b500ad7a1/8037619d3d574ab0b5bf55b263c5f0e7/FLAG7f30868af [2018-12-01 22:47:50,287 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 22:47:50,287 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/sv-benchmarks/c/pthread-atomic/read_write_lock_false-unreach-call.i [2018-12-01 22:47:50,296 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/data/b500ad7a1/8037619d3d574ab0b5bf55b263c5f0e7/FLAG7f30868af [2018-12-01 22:47:50,306 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/data/b500ad7a1/8037619d3d574ab0b5bf55b263c5f0e7 [2018-12-01 22:47:50,308 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 22:47:50,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 22:47:50,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 22:47:50,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 22:47:50,311 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 22:47:50,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 10:47:50" (1/1) ... [2018-12-01 22:47:50,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52fe4f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50, skipping insertion in model container [2018-12-01 22:47:50,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 10:47:50" (1/1) ... [2018-12-01 22:47:50,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 22:47:50,336 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 22:47:50,490 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 22:47:50,497 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 22:47:50,576 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 22:47:50,607 INFO L195 MainTranslator]: Completed translation [2018-12-01 22:47:50,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50 WrapperNode [2018-12-01 22:47:50,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 22:47:50,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 22:47:50,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 22:47:50,608 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 22:47:50,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50" (1/1) ... [2018-12-01 22:47:50,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50" (1/1) ... [2018-12-01 22:47:50,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 22:47:50,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 22:47:50,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 22:47:50,640 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 22:47:50,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50" (1/1) ... [2018-12-01 22:47:50,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50" (1/1) ... [2018-12-01 22:47:50,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50" (1/1) ... [2018-12-01 22:47:50,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50" (1/1) ... [2018-12-01 22:47:50,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50" (1/1) ... [2018-12-01 22:47:50,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50" (1/1) ... [2018-12-01 22:47:50,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50" (1/1) ... [2018-12-01 22:47:50,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 22:47:50,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 22:47:50,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 22:47:50,658 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 22:47:50,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/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 [2018-12-01 22:47:50,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-01 22:47:50,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-01 22:47:50,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-01 22:47:50,693 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2018-12-01 22:47:50,693 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2018-12-01 22:47:50,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-01 22:47:50,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 22:47:50,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 22:47:50,693 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2018-12-01 22:47:50,693 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2018-12-01 22:47:50,694 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-01 22:47:50,759 INFO L1421 $ProcedureCfgBuilder]: dropping label inside atomic statement: __VERIFIER_atomic_take_read_lock_returnLabel [2018-12-01 22:47:50,839 INFO L1421 $ProcedureCfgBuilder]: dropping label inside atomic statement: __VERIFIER_atomic_take_write_lock_returnLabel [2018-12-01 22:47:50,845 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 22:47:50,845 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-01 22:47:50,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:47:50 BoogieIcfgContainer [2018-12-01 22:47:50,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 22:47:50,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 22:47:50,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 22:47:50,849 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 22:47:50,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 10:47:50" (1/3) ... [2018-12-01 22:47:50,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13bc82e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 10:47:50, skipping insertion in model container [2018-12-01 22:47:50,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:50" (2/3) ... [2018-12-01 22:47:50,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13bc82e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 10:47:50, skipping insertion in model container [2018-12-01 22:47:50,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:47:50" (3/3) ... [2018-12-01 22:47:50,852 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock_false-unreach-call.i [2018-12-01 22:47:50,879 WARN L317 ript$VariableManager]: TermVariabe |Thread2_reader_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,879 WARN L317 ript$VariableManager]: TermVariabe |Thread2_reader_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,879 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,880 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,880 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,880 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,880 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,880 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,881 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,881 WARN L317 ript$VariableManager]: TermVariabe |Thread2_reader_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,881 WARN L317 ript$VariableManager]: TermVariabe |Thread2_reader_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,881 WARN L317 ript$VariableManager]: TermVariabe |Thread0_reader_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,881 WARN L317 ript$VariableManager]: TermVariabe |Thread0_reader_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,882 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,882 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,882 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,882 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,882 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,883 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,883 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,883 WARN L317 ript$VariableManager]: TermVariabe |Thread0_reader_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,883 WARN L317 ript$VariableManager]: TermVariabe |Thread0_reader_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,883 WARN L317 ript$VariableManager]: TermVariabe |Thread3_writer_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,883 WARN L317 ript$VariableManager]: TermVariabe |Thread3_writer_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,884 WARN L317 ript$VariableManager]: TermVariabe Thread3_writer_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,884 WARN L317 ript$VariableManager]: TermVariabe Thread3_writer_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,884 WARN L317 ript$VariableManager]: TermVariabe |Thread3_writer_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,884 WARN L317 ript$VariableManager]: TermVariabe |Thread3_writer_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,884 WARN L317 ript$VariableManager]: TermVariabe |Thread1_writer_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,884 WARN L317 ript$VariableManager]: TermVariabe |Thread1_writer_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,885 WARN L317 ript$VariableManager]: TermVariabe Thread1_writer_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,885 WARN L317 ript$VariableManager]: TermVariabe Thread1_writer_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,885 WARN L317 ript$VariableManager]: TermVariabe |Thread1_writer_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,885 WARN L317 ript$VariableManager]: TermVariabe |Thread1_writer_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:50,913 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-01 22:47:50,913 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 22:47:50,919 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-12-01 22:47:50,929 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2018-12-01 22:47:50,945 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 22:47:50,945 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 22:47:50,945 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 22:47:50,945 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 22:47:50,946 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 22:47:50,946 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 22:47:50,946 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 22:47:50,946 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 22:47:50,954 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 84places, 93 transitions [2018-12-01 22:47:52,221 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 26397 states. [2018-12-01 22:47:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 26397 states. [2018-12-01 22:47:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-01 22:47:52,228 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:47:52,228 INFO L402 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] [2018-12-01 22:47:52,230 INFO L423 AbstractCegarLoop]: === Iteration 1 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:47:52,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:47:52,233 INFO L82 PathProgramCache]: Analyzing trace with hash 563310493, now seen corresponding path program 1 times [2018-12-01 22:47:52,235 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:47:52,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:52,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:47:52,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:52,272 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:47:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:47:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:47:52,367 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:47:52,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-01 22:47:52,367 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:47:52,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-01 22:47:52,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-01 22:47:52,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:47:52,379 INFO L87 Difference]: Start difference. First operand 26397 states. Second operand 4 states. [2018-12-01 22:47:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:47:52,717 INFO L93 Difference]: Finished difference Result 52906 states and 202299 transitions. [2018-12-01 22:47:52,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 22:47:52,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-12-01 22:47:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:47:52,847 INFO L225 Difference]: With dead ends: 52906 [2018-12-01 22:47:52,847 INFO L226 Difference]: Without dead ends: 36824 [2018-12-01 22:47:52,848 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:47:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36824 states. [2018-12-01 22:47:53,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36824 to 22832. [2018-12-01 22:47:53,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22832 states. [2018-12-01 22:47:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22832 states to 22832 states and 87504 transitions. [2018-12-01 22:47:53,493 INFO L78 Accepts]: Start accepts. Automaton has 22832 states and 87504 transitions. Word has length 23 [2018-12-01 22:47:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:47:53,494 INFO L480 AbstractCegarLoop]: Abstraction has 22832 states and 87504 transitions. [2018-12-01 22:47:53,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-01 22:47:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 22832 states and 87504 transitions. [2018-12-01 22:47:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-01 22:47:53,495 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:47:53,495 INFO L402 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] [2018-12-01 22:47:53,496 INFO L423 AbstractCegarLoop]: === Iteration 2 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:47:53,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:47:53,496 INFO L82 PathProgramCache]: Analyzing trace with hash 175754366, now seen corresponding path program 1 times [2018-12-01 22:47:53,496 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:47:53,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:53,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:47:53,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:53,499 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:47:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:47:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:47:53,543 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:47:53,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-01 22:47:53,543 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:47:53,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-01 22:47:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-01 22:47:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:47:53,544 INFO L87 Difference]: Start difference. First operand 22832 states and 87504 transitions. Second operand 4 states. [2018-12-01 22:47:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:47:53,722 INFO L93 Difference]: Finished difference Result 36860 states and 131462 transitions. [2018-12-01 22:47:53,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-01 22:47:53,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-12-01 22:47:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:47:53,818 INFO L225 Difference]: With dead ends: 36860 [2018-12-01 22:47:53,819 INFO L226 Difference]: Without dead ends: 36500 [2018-12-01 22:47:53,819 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:47:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36500 states. [2018-12-01 22:47:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36500 to 24815. [2018-12-01 22:47:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24815 states. [2018-12-01 22:47:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24815 states to 24815 states and 89636 transitions. [2018-12-01 22:47:54,310 INFO L78 Accepts]: Start accepts. Automaton has 24815 states and 89636 transitions. Word has length 25 [2018-12-01 22:47:54,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:47:54,310 INFO L480 AbstractCegarLoop]: Abstraction has 24815 states and 89636 transitions. [2018-12-01 22:47:54,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-01 22:47:54,310 INFO L276 IsEmpty]: Start isEmpty. Operand 24815 states and 89636 transitions. [2018-12-01 22:47:54,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-01 22:47:54,311 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:47:54,312 INFO L402 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] [2018-12-01 22:47:54,312 INFO L423 AbstractCegarLoop]: === Iteration 3 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:47:54,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:47:54,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1318827774, now seen corresponding path program 2 times [2018-12-01 22:47:54,312 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:47:54,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:54,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:47:54,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:54,315 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:47:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:47:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:47:54,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:47:54,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 22:47:54,352 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:47:54,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 22:47:54,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 22:47:54,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:47:54,353 INFO L87 Difference]: Start difference. First operand 24815 states and 89636 transitions. Second operand 5 states. [2018-12-01 22:47:54,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:47:54,410 INFO L93 Difference]: Finished difference Result 14369 states and 47935 transitions. [2018-12-01 22:47:54,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 22:47:54,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-12-01 22:47:54,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:47:54,431 INFO L225 Difference]: With dead ends: 14369 [2018-12-01 22:47:54,431 INFO L226 Difference]: Without dead ends: 13889 [2018-12-01 22:47:54,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:47:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13889 states. [2018-12-01 22:47:54,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13889 to 13889. [2018-12-01 22:47:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13889 states. [2018-12-01 22:47:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13889 states to 13889 states and 46343 transitions. [2018-12-01 22:47:54,602 INFO L78 Accepts]: Start accepts. Automaton has 13889 states and 46343 transitions. Word has length 25 [2018-12-01 22:47:54,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:47:54,603 INFO L480 AbstractCegarLoop]: Abstraction has 13889 states and 46343 transitions. [2018-12-01 22:47:54,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 22:47:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 13889 states and 46343 transitions. [2018-12-01 22:47:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-01 22:47:54,605 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:47:54,605 INFO L402 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] [2018-12-01 22:47:54,605 INFO L423 AbstractCegarLoop]: === Iteration 4 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:47:54,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:47:54,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1891005508, now seen corresponding path program 1 times [2018-12-01 22:47:54,605 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:47:54,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:54,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 22:47:54,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:54,607 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:47:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:47:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:47:54,624 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:47:54,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-01 22:47:54,625 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:47:54,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-01 22:47:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-01 22:47:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:47:54,625 INFO L87 Difference]: Start difference. First operand 13889 states and 46343 transitions. Second operand 4 states. [2018-12-01 22:47:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:47:54,710 INFO L93 Difference]: Finished difference Result 14756 states and 48986 transitions. [2018-12-01 22:47:54,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 22:47:54,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2018-12-01 22:47:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:47:54,778 INFO L225 Difference]: With dead ends: 14756 [2018-12-01 22:47:54,778 INFO L226 Difference]: Without dead ends: 8996 [2018-12-01 22:47:54,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:47:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8996 states. [2018-12-01 22:47:54,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8996 to 7637. [2018-12-01 22:47:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7637 states. [2018-12-01 22:47:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7637 states to 7637 states and 24730 transitions. [2018-12-01 22:47:54,860 INFO L78 Accepts]: Start accepts. Automaton has 7637 states and 24730 transitions. Word has length 29 [2018-12-01 22:47:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:47:54,861 INFO L480 AbstractCegarLoop]: Abstraction has 7637 states and 24730 transitions. [2018-12-01 22:47:54,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-01 22:47:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 7637 states and 24730 transitions. [2018-12-01 22:47:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-01 22:47:54,865 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:47:54,865 INFO L402 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] [2018-12-01 22:47:54,865 INFO L423 AbstractCegarLoop]: === Iteration 5 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:47:54,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:47:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1715420402, now seen corresponding path program 1 times [2018-12-01 22:47:54,865 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:47:54,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:54,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:47:54,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:54,867 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:47:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:47:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:47:54,908 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:47:54,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-01 22:47:54,908 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:47:54,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 22:47:54,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 22:47:54,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-01 22:47:54,909 INFO L87 Difference]: Start difference. First operand 7637 states and 24730 transitions. Second operand 6 states. [2018-12-01 22:47:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:47:54,993 INFO L93 Difference]: Finished difference Result 8537 states and 27535 transitions. [2018-12-01 22:47:54,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 22:47:54,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2018-12-01 22:47:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:47:55,002 INFO L225 Difference]: With dead ends: 8537 [2018-12-01 22:47:55,003 INFO L226 Difference]: Without dead ends: 7898 [2018-12-01 22:47:55,003 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-12-01 22:47:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7898 states. [2018-12-01 22:47:55,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7898 to 7322. [2018-12-01 22:47:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7322 states. [2018-12-01 22:47:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7322 states to 7322 states and 23826 transitions. [2018-12-01 22:47:55,089 INFO L78 Accepts]: Start accepts. Automaton has 7322 states and 23826 transitions. Word has length 38 [2018-12-01 22:47:55,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:47:55,089 INFO L480 AbstractCegarLoop]: Abstraction has 7322 states and 23826 transitions. [2018-12-01 22:47:55,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 22:47:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7322 states and 23826 transitions. [2018-12-01 22:47:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-01 22:47:55,092 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:47:55,092 INFO L402 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] [2018-12-01 22:47:55,093 INFO L423 AbstractCegarLoop]: === Iteration 6 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:47:55,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:47:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash 140136184, now seen corresponding path program 2 times [2018-12-01 22:47:55,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:47:55,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:55,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:47:55,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:47:55,095 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:47:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 22:47:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 22:47:55,121 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.modelcheckerutils.cfg.IcfgProgramExecution.createATESequence(IcfgProgramExecution.java:179) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.cfg.IcfgProgramExecution.create(IcfgProgramExecution.java:110) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.cfg.IcfgProgramExecution.create(IcfgProgramExecution.java:87) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.IcfgProgramExecutionBuilder.computeIcfgProgramExecution(IcfgProgramExecutionBuilder.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.IcfgProgramExecutionBuilder.getIcfgProgramExecution(IcfgProgramExecutionBuilder.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.computeRcfgProgramExecution(TraceCheck.java:385) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.computeRcfgProgramExecutionAndDecodeBranches(TraceCheck.java:344) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.computeRcfgProgramExecutionAndDecodeBranches(TraceCheck.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:214) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-12-01 22:47:55,123 INFO L168 Benchmark]: Toolchain (without parser) took 4815.59 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 812.6 MB). Free memory was 957.1 MB in the beginning and 1.2 GB in the end (delta: -248.4 MB). Peak memory consumption was 564.2 MB. Max. memory is 11.5 GB. [2018-12-01 22:47:55,125 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 22:47:55,125 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 957.1 MB in the beginning and 1.1 GB in the end (delta: -178.7 MB). Peak memory consumption was 30.4 MB. Max. memory is 11.5 GB. [2018-12-01 22:47:55,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.71 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. [2018-12-01 22:47:55,126 INFO L168 Benchmark]: Boogie Preprocessor took 17.84 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. [2018-12-01 22:47:55,126 INFO L168 Benchmark]: RCFGBuilder took 187.89 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: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 11.5 GB. [2018-12-01 22:47:55,127 INFO L168 Benchmark]: TraceAbstraction took 4276.51 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 653.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -95.4 MB). Peak memory consumption was 557.8 MB. Max. memory is 11.5 GB. [2018-12-01 22:47:55,129 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 298.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 957.1 MB in the beginning and 1.1 GB in the end (delta: -178.7 MB). Peak memory consumption was 30.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.71 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 17.84 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 187.89 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: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4276.51 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 653.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -95.4 MB). Peak memory consumption was 557.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.modelcheckerutils.cfg.IcfgProgramExecution.createATESequence(IcfgProgramExecution.java:179) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-01 22:47:56,419 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 22:47:56,420 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 22:47:56,426 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 22:47:56,426 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 22:47:56,427 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 22:47:56,427 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 22:47:56,428 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 22:47:56,429 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 22:47:56,430 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 22:47:56,431 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 22:47:56,431 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 22:47:56,431 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 22:47:56,432 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 22:47:56,433 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 22:47:56,433 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 22:47:56,434 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 22:47:56,435 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 22:47:56,436 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 22:47:56,437 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 22:47:56,437 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 22:47:56,438 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 22:47:56,440 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 22:47:56,440 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 22:47:56,440 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 22:47:56,441 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 22:47:56,441 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 22:47:56,441 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 22:47:56,442 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 22:47:56,442 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 22:47:56,442 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 22:47:56,443 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 22:47:56,443 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 22:47:56,443 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 22:47:56,443 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 22:47:56,444 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 22:47:56,444 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-01 22:47:56,454 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 22:47:56,454 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 22:47:56,455 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 22:47:56,455 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 22:47:56,455 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-01 22:47:56,455 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-01 22:47:56,456 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-01 22:47:56,456 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-01 22:47:56,456 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-01 22:47:56,456 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-01 22:47:56,457 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 22:47:56,457 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 22:47:56,457 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 22:47:56,457 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 22:47:56,457 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 22:47:56,457 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 22:47:56,457 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 22:47:56,458 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-01 22:47:56,458 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-01 22:47:56,458 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 22:47:56,458 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 22:47:56,458 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 22:47:56,458 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 22:47:56,459 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 22:47:56,459 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 22:47:56,459 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 22:47:56,459 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 22:47:56,459 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 22:47:56,459 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 22:47:56,460 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 22:47:56,460 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 22:47:56,460 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-01 22:47:56,460 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 22:47:56,460 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-01 22:47:56,460 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-01 22:47:56,460 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/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 -> 7a44ec3fe14113a3aba74e37fda369041ad122ce [2018-12-01 22:47:56,484 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 22:47:56,492 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 22:47:56,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 22:47:56,495 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 22:47:56,496 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 22:47:56,496 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/../../sv-benchmarks/c/pthread-atomic/read_write_lock_false-unreach-call.i [2018-12-01 22:47:56,534 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/data/489f44538/b48435990b794a2ba7e3101163604996/FLAGd7802eb74 [2018-12-01 22:47:56,958 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 22:47:56,958 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/sv-benchmarks/c/pthread-atomic/read_write_lock_false-unreach-call.i [2018-12-01 22:47:56,964 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/data/489f44538/b48435990b794a2ba7e3101163604996/FLAGd7802eb74 [2018-12-01 22:47:56,972 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/data/489f44538/b48435990b794a2ba7e3101163604996 [2018-12-01 22:47:56,974 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 22:47:56,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 22:47:56,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 22:47:56,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 22:47:56,977 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 22:47:56,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 10:47:56" (1/1) ... [2018-12-01 22:47:56,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5554d819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:56, skipping insertion in model container [2018-12-01 22:47:56,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 10:47:56" (1/1) ... [2018-12-01 22:47:56,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 22:47:57,001 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 22:47:57,167 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 22:47:57,176 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 22:47:57,241 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 22:47:57,271 INFO L195 MainTranslator]: Completed translation [2018-12-01 22:47:57,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57 WrapperNode [2018-12-01 22:47:57,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 22:47:57,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 22:47:57,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 22:47:57,272 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 22:47:57,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57" (1/1) ... [2018-12-01 22:47:57,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57" (1/1) ... [2018-12-01 22:47:57,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 22:47:57,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 22:47:57,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 22:47:57,299 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 22:47:57,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57" (1/1) ... [2018-12-01 22:47:57,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57" (1/1) ... [2018-12-01 22:47:57,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57" (1/1) ... [2018-12-01 22:47:57,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57" (1/1) ... [2018-12-01 22:47:57,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57" (1/1) ... [2018-12-01 22:47:57,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57" (1/1) ... [2018-12-01 22:47:57,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57" (1/1) ... [2018-12-01 22:47:57,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 22:47:57,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 22:47:57,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 22:47:57,315 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 22:47:57,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/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 [2018-12-01 22:47:57,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-01 22:47:57,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-01 22:47:57,347 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2018-12-01 22:47:57,347 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2018-12-01 22:47:57,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-01 22:47:57,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-12-01 22:47:57,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 22:47:57,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 22:47:57,347 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2018-12-01 22:47:57,347 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2018-12-01 22:47:57,348 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-01 22:47:57,417 INFO L1421 $ProcedureCfgBuilder]: dropping label inside atomic statement: __VERIFIER_atomic_take_read_lock_returnLabel [2018-12-01 22:47:57,510 INFO L1421 $ProcedureCfgBuilder]: dropping label inside atomic statement: __VERIFIER_atomic_take_write_lock_returnLabel [2018-12-01 22:47:57,516 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 22:47:57,516 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-01 22:47:57,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:47:57 BoogieIcfgContainer [2018-12-01 22:47:57,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 22:47:57,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 22:47:57,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 22:47:57,519 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 22:47:57,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 10:47:56" (1/3) ... [2018-12-01 22:47:57,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5e10cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 10:47:57, skipping insertion in model container [2018-12-01 22:47:57,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:47:57" (2/3) ... [2018-12-01 22:47:57,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5e10cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 10:47:57, skipping insertion in model container [2018-12-01 22:47:57,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:47:57" (3/3) ... [2018-12-01 22:47:57,521 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock_false-unreach-call.i [2018-12-01 22:47:57,540 WARN L317 ript$VariableManager]: TermVariabe |Thread2_reader_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,540 WARN L317 ript$VariableManager]: TermVariabe |Thread2_reader_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,540 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,540 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,540 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,540 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,541 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,541 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,541 WARN L317 ript$VariableManager]: TermVariabe Thread2_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,541 WARN L317 ript$VariableManager]: TermVariabe |Thread2_reader_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,541 WARN L317 ript$VariableManager]: TermVariabe |Thread2_reader_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,541 WARN L317 ript$VariableManager]: TermVariabe |Thread0_reader_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,541 WARN L317 ript$VariableManager]: TermVariabe |Thread0_reader_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,541 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,542 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,542 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,542 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,542 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,542 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,542 WARN L317 ript$VariableManager]: TermVariabe Thread0_reader_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,542 WARN L317 ript$VariableManager]: TermVariabe |Thread0_reader_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,542 WARN L317 ript$VariableManager]: TermVariabe |Thread0_reader_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,543 WARN L317 ript$VariableManager]: TermVariabe |Thread3_writer_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,543 WARN L317 ript$VariableManager]: TermVariabe |Thread3_writer_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,543 WARN L317 ript$VariableManager]: TermVariabe Thread3_writer_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,543 WARN L317 ript$VariableManager]: TermVariabe Thread3_writer_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,543 WARN L317 ript$VariableManager]: TermVariabe |Thread3_writer_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,543 WARN L317 ript$VariableManager]: TermVariabe |Thread3_writer_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,543 WARN L317 ript$VariableManager]: TermVariabe |Thread1_writer_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,543 WARN L317 ript$VariableManager]: TermVariabe |Thread1_writer_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,543 WARN L317 ript$VariableManager]: TermVariabe Thread1_writer_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,543 WARN L317 ript$VariableManager]: TermVariabe Thread1_writer_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,544 WARN L317 ript$VariableManager]: TermVariabe |Thread1_writer_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,544 WARN L317 ript$VariableManager]: TermVariabe |Thread1_writer_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 22:47:57,564 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-01 22:47:57,565 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 22:47:57,569 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-12-01 22:47:57,578 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2018-12-01 22:47:57,592 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 22:47:57,592 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 22:47:57,592 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 22:47:57,592 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 22:47:57,592 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 22:47:57,592 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 22:47:57,592 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 22:47:57,592 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 22:47:57,592 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 22:47:57,598 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 84places, 93 transitions [2018-12-01 22:47:58,858 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 26397 states. [2018-12-01 22:47:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 26397 states. [2018-12-01 22:47:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-01 22:47:58,865 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:47:58,865 INFO L402 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] [2018-12-01 22:47:58,867 INFO L423 AbstractCegarLoop]: === Iteration 1 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:47:58,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:47:58,870 INFO L82 PathProgramCache]: Analyzing trace with hash 563310493, now seen corresponding path program 1 times [2018-12-01 22:47:58,873 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:47:58,873 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:47:58,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:47:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:47:58,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:47:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:47:58,954 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:47:58,956 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:47:58,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-01 22:47:58,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-01 22:47:58,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-01 22:47:58,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:47:58,969 INFO L87 Difference]: Start difference. First operand 26397 states. Second operand 4 states. [2018-12-01 22:47:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:47:59,332 INFO L93 Difference]: Finished difference Result 52906 states and 202299 transitions. [2018-12-01 22:47:59,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 22:47:59,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-12-01 22:47:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:47:59,471 INFO L225 Difference]: With dead ends: 52906 [2018-12-01 22:47:59,471 INFO L226 Difference]: Without dead ends: 36824 [2018-12-01 22:47:59,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:47:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36824 states. [2018-12-01 22:48:00,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36824 to 22832. [2018-12-01 22:48:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22832 states. [2018-12-01 22:48:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22832 states to 22832 states and 87504 transitions. [2018-12-01 22:48:00,234 INFO L78 Accepts]: Start accepts. Automaton has 22832 states and 87504 transitions. Word has length 23 [2018-12-01 22:48:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:48:00,234 INFO L480 AbstractCegarLoop]: Abstraction has 22832 states and 87504 transitions. [2018-12-01 22:48:00,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-01 22:48:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 22832 states and 87504 transitions. [2018-12-01 22:48:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-01 22:48:00,236 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:48:00,236 INFO L402 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] [2018-12-01 22:48:00,237 INFO L423 AbstractCegarLoop]: === Iteration 2 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:48:00,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:48:00,237 INFO L82 PathProgramCache]: Analyzing trace with hash 175754366, now seen corresponding path program 1 times [2018-12-01 22:48:00,237 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:48:00,237 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:48:00,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:48:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:48:00,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:48:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:48:00,296 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:48:00,298 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:48:00,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-01 22:48:00,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-01 22:48:00,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-01 22:48:00,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:48:00,300 INFO L87 Difference]: Start difference. First operand 22832 states and 87504 transitions. Second operand 4 states. [2018-12-01 22:48:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:48:00,580 INFO L93 Difference]: Finished difference Result 44834 states and 165805 transitions. [2018-12-01 22:48:00,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-01 22:48:00,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-12-01 22:48:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:48:00,707 INFO L225 Difference]: With dead ends: 44834 [2018-12-01 22:48:00,707 INFO L226 Difference]: Without dead ends: 44474 [2018-12-01 22:48:00,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:48:00,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44474 states. [2018-12-01 22:48:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44474 to 24815. [2018-12-01 22:48:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24815 states. [2018-12-01 22:48:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24815 states to 24815 states and 92018 transitions. [2018-12-01 22:48:01,280 INFO L78 Accepts]: Start accepts. Automaton has 24815 states and 92018 transitions. Word has length 25 [2018-12-01 22:48:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:48:01,280 INFO L480 AbstractCegarLoop]: Abstraction has 24815 states and 92018 transitions. [2018-12-01 22:48:01,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-01 22:48:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 24815 states and 92018 transitions. [2018-12-01 22:48:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-01 22:48:01,282 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:48:01,282 INFO L402 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] [2018-12-01 22:48:01,282 INFO L423 AbstractCegarLoop]: === Iteration 3 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:48:01,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:48:01,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1318827774, now seen corresponding path program 2 times [2018-12-01 22:48:01,282 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:48:01,282 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:48:01,299 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-01 22:48:01,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-01 22:48:01,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 22:48:01,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:48:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:48:01,328 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:48:01,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:48:01,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-01 22:48:01,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-01 22:48:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-01 22:48:01,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-01 22:48:01,330 INFO L87 Difference]: Start difference. First operand 24815 states and 92018 transitions. Second operand 3 states. [2018-12-01 22:48:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:48:01,388 INFO L93 Difference]: Finished difference Result 18827 states and 66927 transitions. [2018-12-01 22:48:01,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-01 22:48:01,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-12-01 22:48:01,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:48:01,416 INFO L225 Difference]: With dead ends: 18827 [2018-12-01 22:48:01,416 INFO L226 Difference]: Without dead ends: 18347 [2018-12-01 22:48:01,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-01 22:48:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18347 states. [2018-12-01 22:48:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18347 to 18347. [2018-12-01 22:48:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18347 states. [2018-12-01 22:48:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18347 states to 18347 states and 65335 transitions. [2018-12-01 22:48:01,749 INFO L78 Accepts]: Start accepts. Automaton has 18347 states and 65335 transitions. Word has length 25 [2018-12-01 22:48:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:48:01,749 INFO L480 AbstractCegarLoop]: Abstraction has 18347 states and 65335 transitions. [2018-12-01 22:48:01,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-01 22:48:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 18347 states and 65335 transitions. [2018-12-01 22:48:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-01 22:48:01,751 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:48:01,751 INFO L402 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] [2018-12-01 22:48:01,751 INFO L423 AbstractCegarLoop]: === Iteration 4 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:48:01,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:48:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1891005508, now seen corresponding path program 1 times [2018-12-01 22:48:01,752 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:48:01,752 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:48:01,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 22:48:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:48:01,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:48:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:48:01,795 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:48:01,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:48:01,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-01 22:48:01,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-01 22:48:01,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-01 22:48:01,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:48:01,797 INFO L87 Difference]: Start difference. First operand 18347 states and 65335 transitions. Second operand 4 states. [2018-12-01 22:48:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:48:01,950 INFO L93 Difference]: Finished difference Result 32444 states and 115032 transitions. [2018-12-01 22:48:01,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 22:48:01,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2018-12-01 22:48:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:48:01,996 INFO L225 Difference]: With dead ends: 32444 [2018-12-01 22:48:01,996 INFO L226 Difference]: Without dead ends: 25844 [2018-12-01 22:48:01,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:48:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25844 states. [2018-12-01 22:48:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25844 to 15197. [2018-12-01 22:48:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15197 states. [2018-12-01 22:48:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15197 states to 15197 states and 54478 transitions. [2018-12-01 22:48:02,252 INFO L78 Accepts]: Start accepts. Automaton has 15197 states and 54478 transitions. Word has length 29 [2018-12-01 22:48:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:48:02,252 INFO L480 AbstractCegarLoop]: Abstraction has 15197 states and 54478 transitions. [2018-12-01 22:48:02,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-01 22:48:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 15197 states and 54478 transitions. [2018-12-01 22:48:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-01 22:48:02,254 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:48:02,254 INFO L402 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] [2018-12-01 22:48:02,255 INFO L423 AbstractCegarLoop]: === Iteration 5 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:48:02,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:48:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1356359066, now seen corresponding path program 1 times [2018-12-01 22:48:02,255 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:48:02,255 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:48:02,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:48:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:48:02,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:48:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:48:02,302 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:48:02,303 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:48:02,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 22:48:02,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 22:48:02,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 22:48:02,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:48:02,304 INFO L87 Difference]: Start difference. First operand 15197 states and 54478 transitions. Second operand 5 states. [2018-12-01 22:48:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:48:02,350 INFO L93 Difference]: Finished difference Result 8213 states and 26746 transitions. [2018-12-01 22:48:02,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 22:48:02,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2018-12-01 22:48:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:48:02,361 INFO L225 Difference]: With dead ends: 8213 [2018-12-01 22:48:02,361 INFO L226 Difference]: Without dead ends: 8213 [2018-12-01 22:48:02,361 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:48:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8213 states. [2018-12-01 22:48:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8213 to 7637. [2018-12-01 22:48:02,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7637 states. [2018-12-01 22:48:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7637 states to 7637 states and 24730 transitions. [2018-12-01 22:48:02,476 INFO L78 Accepts]: Start accepts. Automaton has 7637 states and 24730 transitions. Word has length 33 [2018-12-01 22:48:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:48:02,476 INFO L480 AbstractCegarLoop]: Abstraction has 7637 states and 24730 transitions. [2018-12-01 22:48:02,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 22:48:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 7637 states and 24730 transitions. [2018-12-01 22:48:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-01 22:48:02,480 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:48:02,480 INFO L402 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] [2018-12-01 22:48:02,481 INFO L423 AbstractCegarLoop]: === Iteration 6 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:48:02,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:48:02,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1715420402, now seen corresponding path program 1 times [2018-12-01 22:48:02,481 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:48:02,481 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:48:02,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:48:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:48:02,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:48:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:48:02,546 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:48:02,547 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:48:02,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 22:48:02,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 22:48:02,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 22:48:02,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:48:02,548 INFO L87 Difference]: Start difference. First operand 7637 states and 24730 transitions. Second operand 5 states. [2018-12-01 22:48:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:48:02,637 INFO L93 Difference]: Finished difference Result 11390 states and 37095 transitions. [2018-12-01 22:48:02,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 22:48:02,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2018-12-01 22:48:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:48:02,652 INFO L225 Difference]: With dead ends: 11390 [2018-12-01 22:48:02,652 INFO L226 Difference]: Without dead ends: 10751 [2018-12-01 22:48:02,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-01 22:48:02,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10751 states. [2018-12-01 22:48:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10751 to 7322. [2018-12-01 22:48:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7322 states. [2018-12-01 22:48:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7322 states to 7322 states and 23826 transitions. [2018-12-01 22:48:02,819 INFO L78 Accepts]: Start accepts. Automaton has 7322 states and 23826 transitions. Word has length 38 [2018-12-01 22:48:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:48:02,820 INFO L480 AbstractCegarLoop]: Abstraction has 7322 states and 23826 transitions. [2018-12-01 22:48:02,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 22:48:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 7322 states and 23826 transitions. [2018-12-01 22:48:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-01 22:48:02,822 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:48:02,823 INFO L402 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] [2018-12-01 22:48:02,823 INFO L423 AbstractCegarLoop]: === Iteration 7 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 22:48:02,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:48:02,823 INFO L82 PathProgramCache]: Analyzing trace with hash 140136184, now seen corresponding path program 2 times [2018-12-01 22:48:02,823 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:48:02,823 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_13451cec-de5c-4a18-b0e9-b9c9427992e8/bin-2019/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:48:02,838 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-01 22:48:02,895 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-01 22:48:02,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-12-01 22:48:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 22:48:03,171 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:48:03,172 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.modelcheckerutils.cfg.IcfgProgramExecution.createATESequence(IcfgProgramExecution.java:179) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.cfg.IcfgProgramExecution.create(IcfgProgramExecution.java:110) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.cfg.IcfgProgramExecution.create(IcfgProgramExecution.java:87) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.IcfgProgramExecutionBuilder.computeIcfgProgramExecution(IcfgProgramExecutionBuilder.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.IcfgProgramExecutionBuilder.getIcfgProgramExecution(IcfgProgramExecutionBuilder.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.computeRcfgProgramExecution(TraceCheck.java:385) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.computeRcfgProgramExecutionAndDecodeBranches(TraceCheck.java:344) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.computeRcfgProgramExecutionAndDecodeBranches(TraceCheck.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-12-01 22:48:03,175 INFO L168 Benchmark]: Toolchain (without parser) took 6201.20 ms. Allocated memory was 1.0 GB in the beginning and 1.9 GB in the end (delta: 821.6 MB). Free memory was 939.3 MB in the beginning and 1.4 GB in the end (delta: -430.4 MB). Peak memory consumption was 391.1 MB. Max. memory is 11.5 GB. [2018-12-01 22:48:03,177 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 22:48:03,178 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -179.5 MB). Peak memory consumption was 31.6 MB. Max. memory is 11.5 GB. [2018-12-01 22:48:03,178 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.62 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. [2018-12-01 22:48:03,179 INFO L168 Benchmark]: Boogie Preprocessor took 15.70 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. [2018-12-01 22:48:03,179 INFO L168 Benchmark]: RCFGBuilder took 201.52 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: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-12-01 22:48:03,180 INFO L168 Benchmark]: TraceAbstraction took 5657.63 ms. Allocated memory was 1.2 GB in the beginning and 1.9 GB in the end (delta: 676.3 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -275.9 MB). Peak memory consumption was 400.4 MB. Max. memory is 11.5 GB. [2018-12-01 22:48:03,184 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 296.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -179.5 MB). Peak memory consumption was 31.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.62 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 15.70 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 201.52 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: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5657.63 ms. Allocated memory was 1.2 GB in the beginning and 1.9 GB in the end (delta: 676.3 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -275.9 MB). Peak memory consumption was 400.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.modelcheckerutils.cfg.IcfgProgramExecution.createATESequence(IcfgProgramExecution.java:179) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...