./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa 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_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 .............................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 03:01:24,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 03:01:24,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 03:01:24,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 03:01:24,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 03:01:24,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 03:01:24,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 03:01:24,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 03:01:24,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 03:01:24,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 03:01:24,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 03:01:24,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 03:01:24,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 03:01:24,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 03:01:24,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 03:01:24,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 03:01:24,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 03:01:24,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 03:01:25,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 03:01:25,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 03:01:25,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 03:01:25,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 03:01:25,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 03:01:25,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 03:01:25,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 03:01:25,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 03:01:25,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 03:01:25,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 03:01:25,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 03:01:25,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 03:01:25,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 03:01:25,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 03:01:25,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 03:01:25,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 03:01:25,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 03:01:25,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 03:01:25,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 03:01:25,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 03:01:25,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 03:01:25,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 03:01:25,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 03:01:25,027 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 03:01:25,051 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 03:01:25,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 03:01:25,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 03:01:25,052 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 03:01:25,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 03:01:25,052 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 03:01:25,052 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 03:01:25,052 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 03:01:25,053 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 03:01:25,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 03:01:25,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 03:01:25,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 03:01:25,054 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 03:01:25,054 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 03:01:25,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 03:01:25,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 03:01:25,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 03:01:25,055 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 03:01:25,055 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 03:01:25,055 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 03:01:25,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 03:01:25,055 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 03:01:25,055 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 03:01:25,056 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 03:01:25,056 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 03:01:25,056 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 03:01:25,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 03:01:25,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 03:01:25,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 03:01:25,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 03:01:25,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 03:01:25,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 03:01:25,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 03:01:25,057 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 03:01:25,058 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 03:01:25,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 03:01:25,058 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_b41fbbf1-5645-42a0-9673-95fa78455e4c/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2019-11-26 03:01:25,242 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 03:01:25,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 03:01:25,260 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 03:01:25,261 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 03:01:25,261 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 03:01:25,262 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2019-11-26 03:01:25,320 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan/data/b8f87a3d6/8e0c1984eea9440fb294fcc9eea0eb7a/FLAGf765fbecd [2019-11-26 03:01:25,749 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 03:01:25,749 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2019-11-26 03:01:25,763 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan/data/b8f87a3d6/8e0c1984eea9440fb294fcc9eea0eb7a/FLAGf765fbecd [2019-11-26 03:01:25,776 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan/data/b8f87a3d6/8e0c1984eea9440fb294fcc9eea0eb7a [2019-11-26 03:01:25,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 03:01:25,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 03:01:25,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 03:01:25,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 03:01:25,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 03:01:25,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:01:25" (1/1) ... [2019-11-26 03:01:25,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14868710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:25, skipping insertion in model container [2019-11-26 03:01:25,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:01:25" (1/1) ... [2019-11-26 03:01:25,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 03:01:25,828 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 03:01:26,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:01:26,251 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 03:01:26,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:01:26,359 INFO L205 MainTranslator]: Completed translation [2019-11-26 03:01:26,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26 WrapperNode [2019-11-26 03:01:26,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 03:01:26,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 03:01:26,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 03:01:26,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 03:01:26,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26" (1/1) ... [2019-11-26 03:01:26,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26" (1/1) ... [2019-11-26 03:01:26,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 03:01:26,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 03:01:26,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 03:01:26,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 03:01:26,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26" (1/1) ... [2019-11-26 03:01:26,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26" (1/1) ... [2019-11-26 03:01:26,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26" (1/1) ... [2019-11-26 03:01:26,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26" (1/1) ... [2019-11-26 03:01:26,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26" (1/1) ... [2019-11-26 03:01:26,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26" (1/1) ... [2019-11-26 03:01:26,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26" (1/1) ... [2019-11-26 03:01:26,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 03:01:26,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 03:01:26,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 03:01:26,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 03:01:26,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/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 03:01:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 03:01:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 03:01:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 03:01:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 03:01:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 03:01:26,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 03:01:27,101 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 03:01:27,102 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-26 03:01:27,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:01:27 BoogieIcfgContainer [2019-11-26 03:01:27,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 03:01:27,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 03:01:27,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 03:01:27,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 03:01:27,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 03:01:25" (1/3) ... [2019-11-26 03:01:27,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e864909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:01:27, skipping insertion in model container [2019-11-26 03:01:27,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:26" (2/3) ... [2019-11-26 03:01:27,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e864909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:01:27, skipping insertion in model container [2019-11-26 03:01:27,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:01:27" (3/3) ... [2019-11-26 03:01:27,110 INFO L109 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2019-11-26 03:01:27,118 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 03:01:27,124 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2019-11-26 03:01:27,134 INFO L249 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2019-11-26 03:01:27,151 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 03:01:27,151 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 03:01:27,152 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 03:01:27,152 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 03:01:27,152 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 03:01:27,152 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 03:01:27,152 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 03:01:27,152 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 03:01:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2019-11-26 03:01:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 03:01:27,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:27,171 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:01:27,172 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-11-26 03:01:27,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:27,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2019-11-26 03:01:27,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:27,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2006971164] [2019-11-26 03:01:27,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/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 03:01:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:27,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 03:01:27,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:27,315 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 03:01:27,316 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 03:01:27,322 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 03:01:27,323 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 03:01:27,323 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 03:01:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:27,334 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:27,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2006971164] [2019-11-26 03:01:27,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:01:27,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 03:01:27,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119174865] [2019-11-26 03:01:27,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 03:01:27,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:27,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 03:01:27,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:01:27,356 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 3 states. [2019-11-26 03:01:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:27,604 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2019-11-26 03:01:27,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 03:01:27,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-26 03:01:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:27,618 INFO L225 Difference]: With dead ends: 55 [2019-11-26 03:01:27,618 INFO L226 Difference]: Without dead ends: 53 [2019-11-26 03:01:27,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:01:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-26 03:01:27,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-26 03:01:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-26 03:01:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-11-26 03:01:27,653 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 7 [2019-11-26 03:01:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:27,654 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-11-26 03:01:27,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 03:01:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-11-26 03:01:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 03:01:27,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:27,655 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:01:27,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:27,857 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-11-26 03:01:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2019-11-26 03:01:27,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:27,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1674438247] [2019-11-26 03:01:27,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/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 [2019-11-26 03:01:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:27,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-26 03:01:27,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:27,948 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:27,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1674438247] [2019-11-26 03:01:27,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:01:27,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-26 03:01:27,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050056285] [2019-11-26 03:01:27,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 03:01:27,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:27,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 03:01:27,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 03:01:27,963 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 4 states. [2019-11-26 03:01:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:28,113 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2019-11-26 03:01:28,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 03:01:28,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-26 03:01:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:28,116 INFO L225 Difference]: With dead ends: 103 [2019-11-26 03:01:28,116 INFO L226 Difference]: Without dead ends: 103 [2019-11-26 03:01:28,117 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 03:01:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-26 03:01:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 54. [2019-11-26 03:01:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-26 03:01:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2019-11-26 03:01:28,125 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 7 [2019-11-26 03:01:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:28,125 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2019-11-26 03:01:28,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 03:01:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2019-11-26 03:01:28,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 03:01:28,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:28,126 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:01:28,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:28,336 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-11-26 03:01:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:28,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1805088679, now seen corresponding path program 1 times [2019-11-26 03:01:28,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:28,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2086370448] [2019-11-26 03:01:28,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/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 03:01:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:28,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 03:01:28,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:28,433 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 03:01:28,434 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 03:01:28,449 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 03:01:28,450 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 03:01:28,450 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 03:01:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:28,465 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:28,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2086370448] [2019-11-26 03:01:28,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:01:28,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-26 03:01:28,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407903095] [2019-11-26 03:01:28,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 03:01:28,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:28,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 03:01:28,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 03:01:28,551 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 6 states. [2019-11-26 03:01:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:29,371 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2019-11-26 03:01:29,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 03:01:29,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-11-26 03:01:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:29,374 INFO L225 Difference]: With dead ends: 107 [2019-11-26 03:01:29,375 INFO L226 Difference]: Without dead ends: 107 [2019-11-26 03:01:29,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-26 03:01:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-26 03:01:29,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 57. [2019-11-26 03:01:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-26 03:01:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2019-11-26 03:01:29,391 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 7 [2019-11-26 03:01:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:29,392 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2019-11-26 03:01:29,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 03:01:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2019-11-26 03:01:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 03:01:29,393 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:29,393 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:01:29,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:29,597 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-11-26 03:01:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2019-11-26 03:01:29,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:29,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1989782782] [2019-11-26 03:01:29,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/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 [2019-11-26 03:01:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 03:01:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 03:01:29,705 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 03:01:29,706 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 03:01:29,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:29,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 03:01:29 BoogieIcfgContainer [2019-11-26 03:01:29,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 03:01:29,930 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 03:01:29,931 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 03:01:29,931 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 03:01:29,931 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:01:27" (3/4) ... [2019-11-26 03:01:29,933 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 03:01:29,970 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b41fbbf1-5645-42a0-9673-95fa78455e4c/bin/utaipan/witness.graphml [2019-11-26 03:01:29,973 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 03:01:29,975 INFO L168 Benchmark]: Toolchain (without parser) took 4194.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 938.0 MB in the beginning and 981.0 MB in the end (delta: -43.0 MB). Peak memory consumption was 105.9 MB. Max. memory is 11.5 GB. [2019-11-26 03:01:29,976 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:01:29,977 INFO L168 Benchmark]: CACSL2BoogieTranslator took 578.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -193.4 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-26 03:01:29,980 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 03:01:29,981 INFO L168 Benchmark]: Boogie Preprocessor took 30.36 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 03:01:29,982 INFO L168 Benchmark]: RCFGBuilder took 671.04 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: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 11.5 GB. [2019-11-26 03:01:29,982 INFO L168 Benchmark]: TraceAbstraction took 2825.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 986.4 MB in the end (delta: 106.6 MB). Peak memory consumption was 106.6 MB. Max. memory is 11.5 GB. [2019-11-26 03:01:29,986 INFO L168 Benchmark]: Witness Printer took 42.71 ms. Allocated memory is still 1.2 GB. Free memory was 986.4 MB in the beginning and 981.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 03:01:29,989 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 578.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -193.4 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.36 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 671.04 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: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2825.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 986.4 MB in the end (delta: 106.6 MB). Peak memory consumption was 106.6 MB. Max. memory is 11.5 GB. * Witness Printer took 42.71 ms. Allocated memory is still 1.2 GB. Free memory was 986.4 MB in the beginning and 981.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 523]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND FALSE !(length < 1) [L518] COND TRUE length % 2 == 0 [L518] length++ [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 60 locations, 23 error locations. Result: UNSAFE, OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 270 SDslu, 195 SDs, 0 SdLazy, 143 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred 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, 3 MinimizatonAttempts, 99 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 966 SizeOfPredicates, 6 NumberOfNonLiveVariables, 68 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...