./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccae6f392e1d87c0b193f39dee91a5c51306cb93 ...................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccae6f392e1d87c0b193f39dee91a5c51306cb93 .......................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:07:44,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:07:44,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:07:44,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:07:44,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:07:44,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:07:44,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:07:44,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:07:44,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:07:44,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:07:44,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:07:44,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:07:44,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:07:44,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:07:44,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:07:44,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:07:44,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:07:44,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:07:44,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:07:44,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:07:44,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:07:44,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:07:44,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:07:44,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:07:44,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:07:44,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:07:44,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:07:44,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:07:44,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:07:44,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:07:44,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:07:44,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:07:44,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:07:44,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:07:44,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:07:44,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:07:44,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:07:44,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:07:44,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:07:44,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:07:44,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:07:44,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:07:44,971 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:07:44,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:07:44,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:07:44,972 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:07:44,972 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:07:44,972 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:07:44,972 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:07:44,973 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:07:44,973 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:07:44,973 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:07:44,974 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:07:44,974 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:07:44,974 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:07:44,975 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:07:44,975 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:07:44,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:07:44,976 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:07:44,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:07:44,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:07:44,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:07:44,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:07:44,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:07:44,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:07:44,977 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:07:44,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:07:44,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:07:44,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:07:44,978 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:07:44,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:07:44,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:07:44,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:07:44,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:07:44,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:07:44,979 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:07:44,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:07:44,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:07:44,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:07:44,979 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccae6f392e1d87c0b193f39dee91a5c51306cb93 [2019-11-26 02:07:45,126 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:07:45,137 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:07:45,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:07:45,142 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:07:45,142 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:07:45,143 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-11-26 02:07:45,196 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/data/339d155c6/75ce9da7726c4057b22d52a60b2c65f1/FLAG7980cc60c [2019-11-26 02:07:45,608 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:07:45,608 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-11-26 02:07:45,614 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/data/339d155c6/75ce9da7726c4057b22d52a60b2c65f1/FLAG7980cc60c [2019-11-26 02:07:45,635 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/data/339d155c6/75ce9da7726c4057b22d52a60b2c65f1 [2019-11-26 02:07:45,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:07:45,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:07:45,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:07:45,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:07:45,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:07:45,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:07:45" (1/1) ... [2019-11-26 02:07:45,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567b046d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45, skipping insertion in model container [2019-11-26 02:07:45,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:07:45" (1/1) ... [2019-11-26 02:07:45,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:07:45,680 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:07:45,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:07:45,824 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:07:45,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:07:45,920 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:07:45,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45 WrapperNode [2019-11-26 02:07:45,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:07:45,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:07:45,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:07:45,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:07:45,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45" (1/1) ... [2019-11-26 02:07:45,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45" (1/1) ... [2019-11-26 02:07:45,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:07:45,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:07:45,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:07:45,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:07:45,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45" (1/1) ... [2019-11-26 02:07:45,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45" (1/1) ... [2019-11-26 02:07:45,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45" (1/1) ... [2019-11-26 02:07:45,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45" (1/1) ... [2019-11-26 02:07:45,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45" (1/1) ... [2019-11-26 02:07:45,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45" (1/1) ... [2019-11-26 02:07:45,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45" (1/1) ... [2019-11-26 02:07:45,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:07:45,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:07:45,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:07:45,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:07:45,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:07:46,027 INFO L130 BoogieDeclarations]: Found specification of procedure A [2019-11-26 02:07:46,029 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2019-11-26 02:07:46,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:07:46,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:07:46,289 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:07:46,290 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:07:46,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:07:46 BoogieIcfgContainer [2019-11-26 02:07:46,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:07:46,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:07:46,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:07:46,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:07:46,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:07:45" (1/3) ... [2019-11-26 02:07:46,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130c8e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:07:46, skipping insertion in model container [2019-11-26 02:07:46,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:45" (2/3) ... [2019-11-26 02:07:46,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130c8e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:07:46, skipping insertion in model container [2019-11-26 02:07:46,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:07:46" (3/3) ... [2019-11-26 02:07:46,309 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2019-11-26 02:07:46,327 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:07:46,333 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:07:46,361 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:07:46,387 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:07:46,387 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:07:46,388 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:07:46,388 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:07:46,388 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:07:46,388 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:07:46,388 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:07:46,389 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:07:46,409 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-26 02:07:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:07:46,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:07:46,432 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:07:46,433 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:07:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:07:46,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1944176839, now seen corresponding path program 1 times [2019-11-26 02:07:46,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:07:46,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192778332] [2019-11-26 02:07:46,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:07:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:07:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:07:46,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192778332] [2019-11-26 02:07:46,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459884988] [2019-11-26 02:07:46,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:07:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:07:46,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:07:46,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:07:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:07:46,817 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:07:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:07:46,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154932220] [2019-11-26 02:07:46,922 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-26 02:07:46,923 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:07:46,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:07:46,935 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:07:46,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:07:47,196 INFO L197 IcfgInterpreter]: Interpreting procedure A with input of size 23 for LOIs [2019-11-26 02:07:47,202 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:07:47,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:07:47,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 5, 5] total 13 [2019-11-26 02:07:47,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054317701] [2019-11-26 02:07:47,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:07:47,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:07:47,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:07:47,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:07:47,559 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 7 states. [2019-11-26 02:07:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:07:47,667 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2019-11-26 02:07:47,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:07:47,670 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-26 02:07:47,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:07:47,685 INFO L225 Difference]: With dead ends: 31 [2019-11-26 02:07:47,686 INFO L226 Difference]: Without dead ends: 21 [2019-11-26 02:07:47,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:07:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-26 02:07:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-26 02:07:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 02:07:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-26 02:07:47,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2019-11-26 02:07:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:07:47,743 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-26 02:07:47,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:07:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-26 02:07:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:07:47,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:07:47,746 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:07:47,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:07:47,958 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:07:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:07:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash 540242173, now seen corresponding path program 1 times [2019-11-26 02:07:47,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:07:47,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009821182] [2019-11-26 02:07:47,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:07:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:07:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-26 02:07:48,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009821182] [2019-11-26 02:07:48,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62371086] [2019-11-26 02:07:48,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:07:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:07:48,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:07:48,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:07:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-26 02:07:48,123 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:07:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-26 02:07:48,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1685980694] [2019-11-26 02:07:48,207 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-26 02:07:48,208 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:07:48,209 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:07:48,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:07:48,410 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) 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) [2019-11-26 02:07:48,421 INFO L168 Benchmark]: Toolchain (without parser) took 2778.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 947.4 MB in the beginning and 981.7 MB in the end (delta: -34.3 MB). Peak memory consumption was 111.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:07:48,422 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:07:48,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 947.4 MB in the beginning and 1.1 GB in the end (delta: -192.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:07:48,426 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:07:48,427 INFO L168 Benchmark]: Boogie Preprocessor took 14.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:07:48,429 INFO L168 Benchmark]: RCFGBuilder took 323.67 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: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:07:48,429 INFO L168 Benchmark]: TraceAbstraction took 2124.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 981.7 MB in the end (delta: 137.5 MB). Peak memory consumption was 137.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:07:48,434 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 277.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 947.4 MB in the beginning and 1.1 GB in the end (delta: -192.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.34 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 14.65 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 323.67 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: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2124.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 981.7 MB in the end (delta: 137.5 MB). Peak memory consumption was 137.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:07:50,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:07:50,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:07:50,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:07:50,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:07:50,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:07:50,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:07:50,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:07:50,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:07:50,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:07:50,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:07:50,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:07:50,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:07:50,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:07:50,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:07:50,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:07:50,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:07:50,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:07:50,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:07:50,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:07:50,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:07:50,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:07:50,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:07:50,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:07:50,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:07:50,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:07:50,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:07:50,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:07:50,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:07:50,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:07:50,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:07:50,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:07:50,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:07:50,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:07:50,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:07:50,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:07:50,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:07:50,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:07:50,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:07:50,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:07:50,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:07:50,299 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:07:50,314 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:07:50,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:07:50,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:07:50,315 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:07:50,316 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:07:50,316 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:07:50,316 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:07:50,316 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:07:50,317 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:07:50,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:07:50,318 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:07:50,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:07:50,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:07:50,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:07:50,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:07:50,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:07:50,319 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:07:50,319 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:07:50,320 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:07:50,320 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:07:50,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:07:50,320 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:07:50,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:07:50,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:07:50,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:07:50,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:07:50,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:07:50,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:07:50,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:07:50,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:07:50,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:07:50,323 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:07:50,323 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:07:50,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:07:50,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:07:50,324 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccae6f392e1d87c0b193f39dee91a5c51306cb93 [2019-11-26 02:07:50,696 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:07:50,706 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:07:50,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:07:50,710 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:07:50,710 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:07:50,711 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-11-26 02:07:50,764 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/data/32e470d11/ba69e47738a2460093a06c394975fad4/FLAG93d3b5130 [2019-11-26 02:07:51,123 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:07:51,124 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-11-26 02:07:51,131 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/data/32e470d11/ba69e47738a2460093a06c394975fad4/FLAG93d3b5130 [2019-11-26 02:07:51,530 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/data/32e470d11/ba69e47738a2460093a06c394975fad4 [2019-11-26 02:07:51,534 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:07:51,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:07:51,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:07:51,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:07:51,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:07:51,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:07:51" (1/1) ... [2019-11-26 02:07:51,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f9471e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51, skipping insertion in model container [2019-11-26 02:07:51,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:07:51" (1/1) ... [2019-11-26 02:07:51,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:07:51,580 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:07:51,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:07:51,794 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:07:51,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:07:51,822 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:07:51,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51 WrapperNode [2019-11-26 02:07:51,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:07:51,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:07:51,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:07:51,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:07:51,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51" (1/1) ... [2019-11-26 02:07:51,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51" (1/1) ... [2019-11-26 02:07:51,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:07:51,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:07:51,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:07:51,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:07:51,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51" (1/1) ... [2019-11-26 02:07:51,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51" (1/1) ... [2019-11-26 02:07:51,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51" (1/1) ... [2019-11-26 02:07:51,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51" (1/1) ... [2019-11-26 02:07:51,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51" (1/1) ... [2019-11-26 02:07:51,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51" (1/1) ... [2019-11-26 02:07:51,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51" (1/1) ... [2019-11-26 02:07:51,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:07:51,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:07:51,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:07:51,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:07:51,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:07:52,005 INFO L130 BoogieDeclarations]: Found specification of procedure A [2019-11-26 02:07:52,005 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2019-11-26 02:07:52,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:07:52,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:07:52,250 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:07:52,250 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:07:52,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:07:52 BoogieIcfgContainer [2019-11-26 02:07:52,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:07:52,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:07:52,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:07:52,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:07:52,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:07:51" (1/3) ... [2019-11-26 02:07:52,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b30da3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:07:52, skipping insertion in model container [2019-11-26 02:07:52,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:07:51" (2/3) ... [2019-11-26 02:07:52,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b30da3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:07:52, skipping insertion in model container [2019-11-26 02:07:52,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:07:52" (3/3) ... [2019-11-26 02:07:52,259 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2019-11-26 02:07:52,285 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:07:52,291 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:07:52,310 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:07:52,337 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:07:52,337 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:07:52,337 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:07:52,338 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:07:52,338 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:07:52,338 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:07:52,338 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:07:52,338 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:07:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-26 02:07:52,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:07:52,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:07:52,366 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:07:52,367 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:07:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:07:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash -103722487, now seen corresponding path program 1 times [2019-11-26 02:07:52,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:07:52,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [888037287] [2019-11-26 02:07:52,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/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 [2019-11-26 02:07:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:07:52,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:07:52,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:07:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:07:52,533 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:07:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:07:52,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [888037287] [2019-11-26 02:07:52,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528438582] [2019-11-26 02:07:52,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:07:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:07:52,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:07:52,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:07:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:07:52,667 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:07:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:07:52,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:07:52,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5] total 6 [2019-11-26 02:07:52,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223450234] [2019-11-26 02:07:52,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:07:52,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:07:52,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:07:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:07:52,759 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2019-11-26 02:07:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:07:52,901 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2019-11-26 02:07:52,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:07:52,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-26 02:07:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:07:52,912 INFO L225 Difference]: With dead ends: 39 [2019-11-26 02:07:52,912 INFO L226 Difference]: Without dead ends: 17 [2019-11-26 02:07:52,915 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:07:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-26 02:07:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-26 02:07:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:07:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-26 02:07:52,949 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2019-11-26 02:07:52,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:07:52,950 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-26 02:07:52,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:07:52,950 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-26 02:07:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-26 02:07:52,952 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:07:52,953 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:07:53,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:07:53,355 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:07:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:07:53,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1835094219, now seen corresponding path program 1 times [2019-11-26 02:07:53,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:07:53,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [978906200] [2019-11-26 02:07:53,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/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 [2019-11-26 02:07:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:07:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:07:53,451 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:07:53,451 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:07:53,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:07:53,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:07:53 BoogieIcfgContainer [2019-11-26 02:07:53,690 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:07:53,690 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:07:53,691 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:07:53,691 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:07:53,692 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:07:52" (3/4) ... [2019-11-26 02:07:53,694 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:07:53,745 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fd09b622-adca-4447-a735-e5f87adad994/bin/utaipan/witness.graphml [2019-11-26 02:07:53,746 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:07:53,748 INFO L168 Benchmark]: Toolchain (without parser) took 2212.09 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 960.4 MB in the beginning and 1.0 GB in the end (delta: -53.9 MB). Peak memory consumption was 54.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:07:53,749 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:07:53,749 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.95 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:07:53,749 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.68 ms. Allocated memory is still 1.0 GB. Free memory is still 949.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:07:53,750 INFO L168 Benchmark]: Boogie Preprocessor took 83.44 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -154.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:07:53,751 INFO L168 Benchmark]: RCFGBuilder took 310.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:07:53,751 INFO L168 Benchmark]: TraceAbstraction took 1437.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 70.1 MB). Peak memory consumption was 70.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:07:53,752 INFO L168 Benchmark]: Witness Printer took 55.61 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:07:53,754 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 280.95 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.68 ms. Allocated memory is still 1.0 GB. Free memory is still 949.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 83.44 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -154.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 310.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1437.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 70.1 MB). Peak memory consumption was 70.1 MB. Max. memory is 11.5 GB. * Witness Printer took 55.61 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int g; VAL [g=0] [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; VAL [g=0] [L28] CALL A(g,h) VAL [\old(a1)=2, \old(a2)=0, \old(g)=0, g=0] [L17] COND TRUE \read(a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=0, a1=2, a2=0, g=0] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=2, \old(g)=0, g=0] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=2, \old(g)=0, a1=0, a2=2, g=2] [L18] RET A(a2,a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=0, A(a2,a1)=3, a1=2, a2=0, g=2] [L28] RET A(g,h) VAL [g=2] [L29] CALL A(g,h) VAL [\old(a1)=2, \old(a2)=0, \old(g)=2, g=2] [L17] COND TRUE \read(a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=2, a1=2, a2=0, g=2] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=2, \old(g)=2, g=2] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=2, \old(g)=2, a1=0, a2=2, g=2] [L18] RET A(a2,a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=2, A(a2,a1)=5, a1=2, a2=0, g=2] [L29] RET A(g,h) VAL [g=2] [L30] COND TRUE \read(g) VAL [g=2] [L31] __VERIFIER_error() VAL [g=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 9 SDslu, 35 SDs, 0 SdLazy, 43 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 1890 SizeOfPredicates, 4 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 4 InterpolantComputations, 0 PerfectInterpolantSequences, 4/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...