./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig7.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig7.c -s /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3428809e66c8ffa9373e37ec3d02a46642c7f8bc ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 19:59:17,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:59:17,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:59:17,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:59:17,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:59:17,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:59:17,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:59:17,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:59:17,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:59:17,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:59:17,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:59:17,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:59:17,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:59:17,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:59:17,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:59:17,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:59:17,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:59:17,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:59:17,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:59:17,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:59:17,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:59:17,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:59:17,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:59:17,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:59:17,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:59:17,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:59:17,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:59:17,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:59:17,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:59:17,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:59:17,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:59:17,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:59:17,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:59:17,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:59:17,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:59:17,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:59:17,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:59:17,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:59:17,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:59:17,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:59:17,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:59:17,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-12-07 19:59:17,341 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:59:17,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:59:17,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 19:59:17,342 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 19:59:17,342 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 19:59:17,342 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 19:59:17,342 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 19:59:17,342 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 19:59:17,342 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 19:59:17,343 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 19:59:17,343 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 19:59:17,343 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 19:59:17,343 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 19:59:17,343 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 19:59:17,343 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 19:59:17,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:59:17,344 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 19:59:17,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 19:59:17,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:59:17,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:59:17,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:59:17,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:59:17,345 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 19:59:17,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:59:17,345 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:59:17,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:59:17,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:59:17,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:59:17,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:59:17,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:59:17,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:59:17,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:59:17,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:59:17,346 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 19:59:17,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 19:59:17,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:59:17,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:59:17,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 19:59:17,347 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_eef49249-6071-452f-ab55-cc1e611c7379/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 ! overflow) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3428809e66c8ffa9373e37ec3d02a46642c7f8bc [2019-12-07 19:59:17,445 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:59:17,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:59:17,457 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:59:17,459 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:59:17,459 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:59:17,460 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig7.c [2019-12-07 19:59:17,502 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/data/1ab46298a/ba78e5cd92634120a777cca937b1cedc/FLAG7dd14edbb [2019-12-07 19:59:17,814 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:59:17,814 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig7.c [2019-12-07 19:59:17,818 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/data/1ab46298a/ba78e5cd92634120a777cca937b1cedc/FLAG7dd14edbb [2019-12-07 19:59:17,827 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/data/1ab46298a/ba78e5cd92634120a777cca937b1cedc [2019-12-07 19:59:17,829 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:59:17,830 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:59:17,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:59:17,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:59:17,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:59:17,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:59:17" (1/1) ... [2019-12-07 19:59:17,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b23322c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:17, skipping insertion in model container [2019-12-07 19:59:17,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:59:17" (1/1) ... [2019-12-07 19:59:17,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:59:17,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:59:17,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:59:17,949 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:59:17,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:59:18,009 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:59:18,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18 WrapperNode [2019-12-07 19:59:18,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:59:18,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:59:18,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:59:18,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:59:18,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18" (1/1) ... [2019-12-07 19:59:18,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18" (1/1) ... [2019-12-07 19:59:18,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:59:18,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:59:18,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:59:18,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:59:18,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18" (1/1) ... [2019-12-07 19:59:18,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18" (1/1) ... [2019-12-07 19:59:18,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18" (1/1) ... [2019-12-07 19:59:18,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18" (1/1) ... [2019-12-07 19:59:18,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18" (1/1) ... [2019-12-07 19:59:18,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18" (1/1) ... [2019-12-07 19:59:18,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18" (1/1) ... [2019-12-07 19:59:18,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:59:18,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:59:18,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:59:18,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:59:18,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:59:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 19:59:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:59:18,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:59:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 19:59:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 19:59:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 19:59:18,269 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:59:18,269 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 19:59:18,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:59:18 BoogieIcfgContainer [2019-12-07 19:59:18,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:59:18,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:59:18,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:59:18,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:59:18,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:59:17" (1/3) ... [2019-12-07 19:59:18,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d56c586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:59:18, skipping insertion in model container [2019-12-07 19:59:18,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:18" (2/3) ... [2019-12-07 19:59:18,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d56c586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:59:18, skipping insertion in model container [2019-12-07 19:59:18,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:59:18" (3/3) ... [2019-12-07 19:59:18,275 INFO L109 eAbstractionObserver]: Analyzing ICFG HeizmannHoenickeLeikePodelski-ATVA2013-Fig7.c [2019-12-07 19:59:18,281 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:59:18,285 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-12-07 19:59:18,293 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-12-07 19:59:18,308 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:59:18,309 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:59:18,309 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:59:18,309 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:59:18,309 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:59:18,309 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:59:18,309 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:59:18,309 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:59:18,319 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-12-07 19:59:18,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 19:59:18,322 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:18,323 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 19:59:18,323 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:59:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:18,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2570507, now seen corresponding path program 1 times [2019-12-07 19:59:18,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:59:18,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431471924] [2019-12-07 19:59:18,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:59:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:18,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431471924] [2019-12-07 19:59:18,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:18,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 19:59:18,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400664637] [2019-12-07 19:59:18,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 19:59:18,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:59:18,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 19:59:18,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 19:59:18,453 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2019-12-07 19:59:18,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:18,499 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-12-07 19:59:18,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 19:59:18,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-12-07 19:59:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:18,506 INFO L225 Difference]: With dead ends: 38 [2019-12-07 19:59:18,506 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 19:59:18,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 19:59:18,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 19:59:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2019-12-07 19:59:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 19:59:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-12-07 19:59:18,531 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 4 [2019-12-07 19:59:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:18,531 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-12-07 19:59:18,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 19:59:18,531 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-12-07 19:59:18,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 19:59:18,531 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:18,531 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 19:59:18,532 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:59:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1824604071, now seen corresponding path program 1 times [2019-12-07 19:59:18,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:59:18,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081174131] [2019-12-07 19:59:18,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:59:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:18,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081174131] [2019-12-07 19:59:18,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:18,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 19:59:18,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069467134] [2019-12-07 19:59:18,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 19:59:18,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:59:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 19:59:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 19:59:18,554 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2019-12-07 19:59:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:18,565 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-12-07 19:59:18,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 19:59:18,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 19:59:18,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:18,566 INFO L225 Difference]: With dead ends: 30 [2019-12-07 19:59:18,566 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 19:59:18,567 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 19:59:18,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 19:59:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 19:59:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 19:59:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 19:59:18,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2019-12-07 19:59:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:18,571 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 19:59:18,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 19:59:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 19:59:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 19:59:18,572 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:18,572 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-12-07 19:59:18,572 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:59:18,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:18,572 INFO L82 PathProgramCache]: Analyzing trace with hash -731385565, now seen corresponding path program 1 times [2019-12-07 19:59:18,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:59:18,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388651680] [2019-12-07 19:59:18,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:59:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:18,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388651680] [2019-12-07 19:59:18,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985020907] [2019-12-07 19:59:18,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/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 [2019-12-07 19:59:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:18,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 19:59:18,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:59:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:18,677 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:59:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:18,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951010948] [2019-12-07 19:59:18,725 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-12-07 19:59:18,725 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 19:59:18,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 19:59:18,733 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 19:59:18,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 19:59:19,036 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 19:59:19,310 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 19:59:19,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 19:59:19,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2019-12-07 19:59:19,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285622359] [2019-12-07 19:59:19,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 19:59:19,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:59:19,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 19:59:19,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2019-12-07 19:59:19,311 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-12-07 19:59:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:19,432 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2019-12-07 19:59:19,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 19:59:19,433 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-12-07 19:59:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:19,434 INFO L225 Difference]: With dead ends: 63 [2019-12-07 19:59:19,434 INFO L226 Difference]: Without dead ends: 62 [2019-12-07 19:59:19,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2019-12-07 19:59:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-07 19:59:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 28. [2019-12-07 19:59:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 19:59:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-12-07 19:59:19,439 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7 [2019-12-07 19:59:19,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:19,439 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-12-07 19:59:19,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 19:59:19,440 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-12-07 19:59:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 19:59:19,440 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:19,440 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2019-12-07 19:59:19,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:59:19,642 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:59:19,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:19,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1198115984, now seen corresponding path program 1 times [2019-12-07 19:59:19,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:59:19,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322699343] [2019-12-07 19:59:19,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:59:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:19,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322699343] [2019-12-07 19:59:19,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901178576] [2019-12-07 19:59:19,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:59:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:19,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 19:59:19,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:59:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:19,869 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:59:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:19,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 19:59:19,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 11 [2019-12-07 19:59:19,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434824604] [2019-12-07 19:59:19,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 19:59:19,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:59:19,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 19:59:19,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-12-07 19:59:19,994 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 10 states. [2019-12-07 19:59:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:20,044 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2019-12-07 19:59:20,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 19:59:20,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2019-12-07 19:59:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:20,046 INFO L225 Difference]: With dead ends: 28 [2019-12-07 19:59:20,046 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 19:59:20,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-07 19:59:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 19:59:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-12-07 19:59:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 19:59:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-12-07 19:59:20,051 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2019-12-07 19:59:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:20,051 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-12-07 19:59:20,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 19:59:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-12-07 19:59:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 19:59:20,052 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:20,052 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:20,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:59:20,253 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:59:20,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:20,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1513214577, now seen corresponding path program 1 times [2019-12-07 19:59:20,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:59:20,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147709488] [2019-12-07 19:59:20,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:59:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 19:59:20,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147709488] [2019-12-07 19:59:20,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:20,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 19:59:20,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243932994] [2019-12-07 19:59:20,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 19:59:20,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:59:20,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 19:59:20,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 19:59:20,319 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-12-07 19:59:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:20,351 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-12-07 19:59:20,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 19:59:20,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-12-07 19:59:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:20,353 INFO L225 Difference]: With dead ends: 37 [2019-12-07 19:59:20,353 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 19:59:20,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 19:59:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 19:59:20,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-12-07 19:59:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 19:59:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-12-07 19:59:20,360 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 9 [2019-12-07 19:59:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:20,360 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-12-07 19:59:20,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 19:59:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-12-07 19:59:20,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 19:59:20,361 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:20,361 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:20,361 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:59:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:20,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1794702509, now seen corresponding path program 1 times [2019-12-07 19:59:20,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:59:20,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301450444] [2019-12-07 19:59:20,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:59:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:59:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:59:20,399 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 19:59:20,399 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 19:59:20,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:59:20 BoogieIcfgContainer [2019-12-07 19:59:20,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:59:20,421 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:59:20,421 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:59:20,421 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:59:20,421 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:59:18" (3/4) ... [2019-12-07 19:59:20,423 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 19:59:20,450 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_eef49249-6071-452f-ab55-cc1e611c7379/bin/utaipan/witness.graphml [2019-12-07 19:59:20,450 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:59:20,451 INFO L168 Benchmark]: Toolchain (without parser) took 2621.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 941.3 MB in the beginning and 1.1 GB in the end (delta: -186.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:59:20,451 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 957.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:59:20,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 179.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 941.3 MB in the beginning and 1.1 GB in the end (delta: -191.4 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:20,451 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.30 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: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:20,452 INFO L168 Benchmark]: Boogie Preprocessor took 14.56 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: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:20,452 INFO L168 Benchmark]: RCFGBuilder took 222.32 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: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:20,452 INFO L168 Benchmark]: TraceAbstraction took 2149.68 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: -23.4 MB). Peak memory consumption was 240.3 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:20,453 INFO L168 Benchmark]: Witness Printer took 28.73 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:20,454 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 957.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 179.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 941.3 MB in the beginning and 1.1 GB in the end (delta: -191.4 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.30 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: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.56 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: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 222.32 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: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2149.68 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: -23.4 MB). Peak memory consumption was 240.3 MB. Max. memory is 11.5 GB. * Witness Printer took 28.73 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: integer overflow possible integer overflow possible We found a FailurePath: [L12] int a_length = __VERIFIER_nondet_int(); [L13] COND FALSE !(a_length < 1) [L16] int a[a_length]; [L17] int j = 0; [L17] COND TRUE j < a_length [L18] a[j] = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j < a_length) [L20] int offset = 1; [L21] int i = 0; [L22] COND TRUE i < a_length [L23] EXPR a[i] [L23] COND FALSE !(a[i] < 0) [L26] EXPR i + offset [L26] EXPR a[i] [L26] i + offset + a[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 6 error locations. Result: UNSAFE, OverallTime: 2.0s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 123 SDslu, 141 SDs, 0 SdLazy, 104 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 48 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 1055 SizeOfPredicates, 4 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 7/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...