./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/invert_string-3.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_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/invert_string-3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/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 ac7c62eef1736762a9ed0f43546ad9c2b468346f .............................................................................................................................................................................................................................................................................................................................................................. 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_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/invert_string-3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/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 ac7c62eef1736762a9ed0f43546ad9c2b468346f ............................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: incompatible size --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:57:15,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:57:15,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:57:15,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:57:15,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:57:15,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:57:15,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:57:15,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:57:15,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:57:15,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:57:15,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:57:15,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:57:15,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:57:15,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:57:15,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:57:15,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:57:15,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:57:15,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:57:15,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:57:15,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:57:15,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:57:15,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:57:15,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:57:15,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:57:15,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:57:15,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:57:15,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:57:15,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:57:15,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:57:15,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:57:15,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:57:15,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:57:15,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:57:15,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:57:15,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:57:15,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:57:15,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:57:15,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:57:15,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:57:15,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:57:15,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:57:15,865 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:57:15,889 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:57:15,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:57:15,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:57:15,890 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:57:15,890 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:57:15,891 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:57:15,891 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:57:15,891 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:57:15,891 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:57:15,891 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:57:15,891 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:57:15,892 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:57:15,892 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:57:15,892 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:57:15,892 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:57:15,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:57:15,893 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:57:15,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:57:15,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:57:15,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:57:15,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:57:15,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:57:15,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:57:15,894 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:57:15,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:57:15,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:57:15,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:57:15,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:57:15,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:57:15,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:57:15,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:57:15,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:57:15,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:57:15,905 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:57:15,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:57:15,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:57:15,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:57:15,906 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_ac06607c-f2be-4b40-9078-0acd66dbb15a/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 -> ac7c62eef1736762a9ed0f43546ad9c2b468346f [2019-11-26 02:57:16,058 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:57:16,068 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:57:16,071 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:57:16,072 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:57:16,072 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:57:16,073 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/../../sv-benchmarks/c/loops/invert_string-3.c [2019-11-26 02:57:16,120 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/data/9975d72a2/4699436e37344106a9af78f7d094048c/FLAG749f0b158 [2019-11-26 02:57:16,500 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:57:16,500 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/sv-benchmarks/c/loops/invert_string-3.c [2019-11-26 02:57:16,504 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/data/9975d72a2/4699436e37344106a9af78f7d094048c/FLAG749f0b158 [2019-11-26 02:57:16,909 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/data/9975d72a2/4699436e37344106a9af78f7d094048c [2019-11-26 02:57:16,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:57:16,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:57:16,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:57:16,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:57:16,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:57:16,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6caeaea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:16, skipping insertion in model container [2019-11-26 02:57:16,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:57:16" (1/1) ... [2019-11-26 02:57:16,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:57:16,944 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:57:17,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:57:17,108 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:57:17,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:57:17,213 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:57:17,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17 WrapperNode [2019-11-26 02:57:17,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:57:17,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:57:17,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:57:17,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:57:17,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17" (1/1) ... [2019-11-26 02:57:17,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17" (1/1) ... [2019-11-26 02:57:17,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:57:17,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:57:17,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:57:17,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:57:17,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17" (1/1) ... [2019-11-26 02:57:17,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17" (1/1) ... [2019-11-26 02:57:17,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17" (1/1) ... [2019-11-26 02:57:17,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17" (1/1) ... [2019-11-26 02:57:17,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17" (1/1) ... [2019-11-26 02:57:17,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17" (1/1) ... [2019-11-26 02:57:17,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17" (1/1) ... [2019-11-26 02:57:17,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:57:17,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:57:17,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:57:17,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:57:17,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/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 02:57:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:57:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:57:17,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:57:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:57:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:57:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:57:17,675 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:57:17,675 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-26 02:57:17,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:57:17 BoogieIcfgContainer [2019-11-26 02:57:17,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:57:17,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:57:17,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:57:17,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:57:17,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:57:16" (1/3) ... [2019-11-26 02:57:17,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b80e970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:57:17, skipping insertion in model container [2019-11-26 02:57:17,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:17" (2/3) ... [2019-11-26 02:57:17,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b80e970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:57:17, skipping insertion in model container [2019-11-26 02:57:17,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:57:17" (3/3) ... [2019-11-26 02:57:17,683 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-3.c [2019-11-26 02:57:17,691 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:57:17,696 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:57:17,704 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:57:17,721 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:57:17,721 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:57:17,722 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:57:17,722 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:57:17,722 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:57:17,722 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:57:17,722 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:57:17,722 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:57:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-26 02:57:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:57:17,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:17,740 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:57:17,740 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:17,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1651693198, now seen corresponding path program 1 times [2019-11-26 02:57:17,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:57:17,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882482320] [2019-11-26 02:57:17,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:57:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:57:18,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882482320] [2019-11-26 02:57:18,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:57:18,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:57:18,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736202111] [2019-11-26 02:57:18,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:57:18,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:57:18,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:57:18,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:57:18,060 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2019-11-26 02:57:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:18,132 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2019-11-26 02:57:18,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:57:18,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-26 02:57:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:18,144 INFO L225 Difference]: With dead ends: 16 [2019-11-26 02:57:18,145 INFO L226 Difference]: Without dead ends: 9 [2019-11-26 02:57:18,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:57:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-26 02:57:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-26 02:57:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-26 02:57:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-26 02:57:18,170 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-11-26 02:57:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:18,170 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-26 02:57:18,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:57:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-26 02:57:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:57:18,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:18,171 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:18,172 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:18,172 INFO L82 PathProgramCache]: Analyzing trace with hash 333332055, now seen corresponding path program 1 times [2019-11-26 02:57:18,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:57:18,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895907686] [2019-11-26 02:57:18,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:57:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:57:18,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895907686] [2019-11-26 02:57:18,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:57:18,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:57:18,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290341418] [2019-11-26 02:57:18,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:57:18,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:57:18,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:57:18,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:57:18,288 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 3 states. [2019-11-26 02:57:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:18,308 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-11-26 02:57:18,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:57:18,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-26 02:57:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:18,310 INFO L225 Difference]: With dead ends: 17 [2019-11-26 02:57:18,310 INFO L226 Difference]: Without dead ends: 10 [2019-11-26 02:57:18,310 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:57:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-26 02:57:18,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-26 02:57:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-26 02:57:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-11-26 02:57:18,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2019-11-26 02:57:18,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:18,314 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-11-26 02:57:18,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:57:18,314 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-11-26 02:57:18,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:57:18,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:18,315 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:18,315 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:18,316 INFO L82 PathProgramCache]: Analyzing trace with hash 967180323, now seen corresponding path program 1 times [2019-11-26 02:57:18,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:57:18,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157512262] [2019-11-26 02:57:18,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:57:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:57:18,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157512262] [2019-11-26 02:57:18,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874591374] [2019-11-26 02:57:18,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/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 02:57:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:18,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-26 02:57:18,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:18,684 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2019-11-26 02:57:18,685 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:57:18,706 INFO L567 ElimStorePlain]: treesize reduction 13, result has 45.8 percent of original size [2019-11-26 02:57:18,706 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:57:18,707 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2019-11-26 02:57:18,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:57:18,805 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 54 [2019-11-26 02:57:18,806 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:57:18,859 INFO L567 ElimStorePlain]: treesize reduction 64, result has 40.7 percent of original size [2019-11-26 02:57:18,859 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_20| vanished before elimination [2019-11-26 02:57:18,860 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:57:18,860 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:112, output treesize:44 [2019-11-26 02:57:18,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:57:18,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:57:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:57:18,997 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:19,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:57:19,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:19,317 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:152) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) 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 02:57:19,325 INFO L168 Benchmark]: Toolchain (without parser) took 2411.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 944.8 MB in the beginning and 996.9 MB in the end (delta: -52.1 MB). Peak memory consumption was 92.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:19,327 INFO L168 Benchmark]: CDTParser took 0.18 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 02:57:19,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -195.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:19,331 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.28 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 02:57:19,333 INFO L168 Benchmark]: Boogie Preprocessor took 26.32 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:19,335 INFO L168 Benchmark]: RCFGBuilder took 398.27 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: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:19,337 INFO L168 Benchmark]: TraceAbstraction took 1644.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 996.9 MB in the end (delta: 112.8 MB). Peak memory consumption was 112.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:19,347 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 300.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -195.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.28 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 26.32 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 398.27 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: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1644.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 996.9 MB in the end (delta: 112.8 MB). Peak memory consumption was 112.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) 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 02:57:21,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:57:21,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:57:21,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:57:21,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:57:21,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:57:21,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:57:21,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:57:21,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:57:21,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:57:21,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:57:21,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:57:21,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:57:21,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:57:21,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:57:21,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:57:21,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:57:21,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:57:21,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:57:21,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:57:21,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:57:21,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:57:21,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:57:21,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:57:21,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:57:21,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:57:21,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:57:21,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:57:21,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:57:21,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:57:21,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:57:21,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:57:21,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:57:21,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:57:21,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:57:21,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:57:21,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:57:21,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:57:21,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:57:21,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:57:21,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:57:21,227 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:57:21,241 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:57:21,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:57:21,242 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:57:21,242 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:57:21,243 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:57:21,243 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:57:21,243 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:57:21,247 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:57:21,248 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:57:21,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:57:21,249 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:57:21,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:57:21,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:57:21,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:57:21,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:57:21,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:57:21,250 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:57:21,250 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:57:21,250 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:57:21,250 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:57:21,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:57:21,251 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:57:21,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:57:21,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:57:21,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:57:21,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:57:21,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:57:21,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:57:21,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:57:21,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:57:21,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:57:21,253 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:57:21,253 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:57:21,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:57:21,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:57:21,254 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_ac06607c-f2be-4b40-9078-0acd66dbb15a/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 -> ac7c62eef1736762a9ed0f43546ad9c2b468346f [2019-11-26 02:57:21,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:57:21,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:57:21,521 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:57:21,522 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:57:21,522 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:57:21,523 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/../../sv-benchmarks/c/loops/invert_string-3.c [2019-11-26 02:57:21,569 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/data/94e22dd7a/78def6f7017f46c8991297634f943b68/FLAG9a7699cb5 [2019-11-26 02:57:21,955 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:57:21,955 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/sv-benchmarks/c/loops/invert_string-3.c [2019-11-26 02:57:21,961 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/data/94e22dd7a/78def6f7017f46c8991297634f943b68/FLAG9a7699cb5 [2019-11-26 02:57:21,978 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/data/94e22dd7a/78def6f7017f46c8991297634f943b68 [2019-11-26 02:57:21,980 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:57:21,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:57:21,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:57:21,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:57:21,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:57:21,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:57:21" (1/1) ... [2019-11-26 02:57:21,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@747f3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:21, skipping insertion in model container [2019-11-26 02:57:21,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:57:21" (1/1) ... [2019-11-26 02:57:22,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:57:22,022 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:57:22,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:57:22,203 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:57:22,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:57:22,237 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:57:22,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22 WrapperNode [2019-11-26 02:57:22,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:57:22,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:57:22,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:57:22,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:57:22,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22" (1/1) ... [2019-11-26 02:57:22,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22" (1/1) ... [2019-11-26 02:57:22,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:57:22,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:57:22,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:57:22,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:57:22,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22" (1/1) ... [2019-11-26 02:57:22,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22" (1/1) ... [2019-11-26 02:57:22,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22" (1/1) ... [2019-11-26 02:57:22,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22" (1/1) ... [2019-11-26 02:57:22,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22" (1/1) ... [2019-11-26 02:57:22,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22" (1/1) ... [2019-11-26 02:57:22,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22" (1/1) ... [2019-11-26 02:57:22,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:57:22,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:57:22,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:57:22,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:57:22,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/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 02:57:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-26 02:57:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:57:22,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:57:22,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-26 02:57:22,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:57:22,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:57:22,653 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:57:22,653 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-26 02:57:22,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:57:22 BoogieIcfgContainer [2019-11-26 02:57:22,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:57:22,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:57:22,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:57:22,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:57:22,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:57:21" (1/3) ... [2019-11-26 02:57:22,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd4bad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:57:22, skipping insertion in model container [2019-11-26 02:57:22,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:57:22" (2/3) ... [2019-11-26 02:57:22,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd4bad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:57:22, skipping insertion in model container [2019-11-26 02:57:22,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:57:22" (3/3) ... [2019-11-26 02:57:22,661 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-3.c [2019-11-26 02:57:22,675 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:57:22,681 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:57:22,701 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:57:22,733 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:57:22,733 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:57:22,733 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:57:22,733 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:57:22,733 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:57:22,733 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:57:22,734 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:57:22,734 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:57:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-26 02:57:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:57:22,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:22,749 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:22,749 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:22,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:22,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2019-11-26 02:57:22,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:57:22,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1427634389] [2019-11-26 02:57:22,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/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 02:57:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:22,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:57:22,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:57:22,872 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:57:22,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1427634389] [2019-11-26 02:57:22,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:57:22,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-26 02:57:22,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719879259] [2019-11-26 02:57:22,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:57:22,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:57:22,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:57:22,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:57:22,903 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-11-26 02:57:22,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:22,983 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2019-11-26 02:57:22,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:57:22,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-26 02:57:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:22,993 INFO L225 Difference]: With dead ends: 35 [2019-11-26 02:57:22,993 INFO L226 Difference]: Without dead ends: 17 [2019-11-26 02:57:22,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 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 02:57:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-26 02:57:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-26 02:57:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:57:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-26 02:57:23,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 9 [2019-11-26 02:57:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:23,033 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-26 02:57:23,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:57:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-26 02:57:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:57:23,034 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:23,034 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:23,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:23,237 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:23,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1566609967, now seen corresponding path program 1 times [2019-11-26 02:57:23,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:57:23,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1644404163] [2019-11-26 02:57:23,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/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 02:57:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:23,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:57:23,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:57:23,395 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:57:23,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1644404163] [2019-11-26 02:57:23,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242017946] [2019-11-26 02:57:23,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:23,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:57:23,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:57:23,599 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:57:23,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:57:23,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2019-11-26 02:57:23,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722253426] [2019-11-26 02:57:23,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:57:23,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:57:23,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:57:23,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:57:23,662 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2019-11-26 02:57:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:23,764 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-11-26 02:57:23,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:57:23,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-26 02:57:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:23,766 INFO L225 Difference]: With dead ends: 28 [2019-11-26 02:57:23,766 INFO L226 Difference]: Without dead ends: 21 [2019-11-26 02:57:23,767 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:57:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-26 02:57:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-26 02:57:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 02:57:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-26 02:57:23,777 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2019-11-26 02:57:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:23,777 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-26 02:57:23,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:57:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-26 02:57:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-26 02:57:23,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:23,780 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:24,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:24,183 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:24,184 INFO L82 PathProgramCache]: Analyzing trace with hash -799235507, now seen corresponding path program 1 times [2019-11-26 02:57:24,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:57:24,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [493954736] [2019-11-26 02:57:24,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/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 02:57:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:24,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:57:24,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:57:24,337 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:57:24,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [493954736] [2019-11-26 02:57:24,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077900539] [2019-11-26 02:57:24,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:57:24,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:57:24,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:57:24,586 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:57:24,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:57:24,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 7] total 17 [2019-11-26 02:57:24,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767176985] [2019-11-26 02:57:24,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-26 02:57:24,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:57:24,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-26 02:57:24,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:57:24,825 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 17 states. [2019-11-26 02:57:25,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:57:25,486 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2019-11-26 02:57:25,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:57:25,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2019-11-26 02:57:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:57:25,488 INFO L225 Difference]: With dead ends: 76 [2019-11-26 02:57:25,488 INFO L226 Difference]: Without dead ends: 63 [2019-11-26 02:57:25,489 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:57:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-26 02:57:25,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 32. [2019-11-26 02:57:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-26 02:57:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-26 02:57:25,498 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2019-11-26 02:57:25,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:57:25,498 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-26 02:57:25,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-26 02:57:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-26 02:57:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-26 02:57:25,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:57:25,500 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:57:25,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:25,909 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:57:25,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:57:25,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2015456385, now seen corresponding path program 2 times [2019-11-26 02:57:25,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:57:25,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2106106298] [2019-11-26 02:57:25,915 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:57:26,087 ERROR L271 FreeRefinementEngine]: Caught known exception: Array theory solver does not yet support write-chains connecting two different constant arrays [2019-11-26 02:57:26,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495351626] [2019-11-26 02:57:26,088 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac06607c-f2be-4b40-9078-0acd66dbb15a/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:26,230 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:57:26,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:57:26,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-26 02:57:26,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:57:26,288 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-26 02:57:26,288 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:57:26,299 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:57:26,299 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:57:26,299 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-26 02:57:26,600 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2019-11-26 02:57:26,601 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:57:26,641 INFO L567 ElimStorePlain]: treesize reduction 3, result has 92.7 percent of original size [2019-11-26 02:57:26,641 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:57:26,642 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:38 [2019-11-26 02:57:26,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:57:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-26 02:57:27,041 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:57:27,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:57:27,545 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:152) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) 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.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) 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 02:57:27,561 INFO L168 Benchmark]: Toolchain (without parser) took 5577.77 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 221.2 MB). Free memory was 960.4 MB in the beginning and 1.2 GB in the end (delta: -244.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:57:27,563 INFO L168 Benchmark]: CDTParser took 0.26 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 02:57:27,565 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.76 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 02:57:27,568 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 949.7 MB in the beginning and 1.2 GB in the end (delta: -212.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:27,570 INFO L168 Benchmark]: Boogie Preprocessor took 24.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:27,572 INFO L168 Benchmark]: RCFGBuilder took 305.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:57:27,574 INFO L168 Benchmark]: TraceAbstraction took 4901.88 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -75.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:57:27,581 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 251.76 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 85.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 949.7 MB in the beginning and 1.2 GB in the end (delta: -212.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 305.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4901.88 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -75.0 MB). There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...