./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig7.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/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 0.2.0-7b2dab5 [2020-12-09 16:13:41,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:13:41,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:13:42,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:13:42,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:13:42,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:13:42,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:13:42,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:13:42,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:13:42,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:13:42,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:13:42,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:13:42,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:13:42,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:13:42,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:13:42,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:13:42,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:13:42,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:13:42,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:13:42,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:13:42,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:13:42,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:13:42,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:13:42,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:13:42,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:13:42,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:13:42,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:13:42,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:13:42,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:13:42,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:13:42,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:13:42,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:13:42,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:13:42,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:13:42,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:13:42,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:13:42,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:13:42,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:13:42,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:13:42,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:13:42,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:13:42,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-09 16:13:42,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:13:42,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:13:42,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:13:42,083 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:13:42,084 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:13:42,084 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:13:42,084 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:13:42,084 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:13:42,084 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:13:42,084 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:13:42,084 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:13:42,084 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:13:42,085 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:13:42,085 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:13:42,085 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:13:42,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:13:42,086 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 16:13:42,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:13:42,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:13:42,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:13:42,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:13:42,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:13:42,086 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 16:13:42,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:13:42,086 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:13:42,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:13:42,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:13:42,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:13:42,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:13:42,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:13:42,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:13:42,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:13:42,087 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:13:42,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:13:42,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:13:42,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:13:42,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:13:42,088 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3428809e66c8ffa9373e37ec3d02a46642c7f8bc [2020-12-09 16:13:42,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:13:42,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:13:42,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:13:42,296 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:13:42,297 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:13:42,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig7.c [2020-12-09 16:13:42,339 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/data/eb53e21a5/871e9b9a9d2c4042b07153ee60ebd1b2/FLAGde9ffcb44 [2020-12-09 16:13:42,755 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:13:42,755 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig7.c [2020-12-09 16:13:42,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/data/eb53e21a5/871e9b9a9d2c4042b07153ee60ebd1b2/FLAGde9ffcb44 [2020-12-09 16:13:42,769 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/data/eb53e21a5/871e9b9a9d2c4042b07153ee60ebd1b2 [2020-12-09 16:13:42,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:13:42,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:13:42,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:13:42,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:13:42,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:13:42,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:13:42" (1/1) ... [2020-12-09 16:13:42,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296903a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42, skipping insertion in model container [2020-12-09 16:13:42,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:13:42" (1/1) ... [2020-12-09 16:13:42,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:13:42,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:13:42,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:13:42,889 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:13:42,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:13:42,923 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:13:42,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42 WrapperNode [2020-12-09 16:13:42,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:13:42,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:13:42,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:13:42,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:13:42,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42" (1/1) ... [2020-12-09 16:13:42,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42" (1/1) ... [2020-12-09 16:13:42,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:13:42,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:13:42,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:13:42,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:13:42,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42" (1/1) ... [2020-12-09 16:13:42,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42" (1/1) ... [2020-12-09 16:13:42,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42" (1/1) ... [2020-12-09 16:13:42,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42" (1/1) ... [2020-12-09 16:13:42,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42" (1/1) ... [2020-12-09 16:13:42,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42" (1/1) ... [2020-12-09 16:13:42,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42" (1/1) ... [2020-12-09 16:13:42,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:13:42,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:13:42,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:13:42,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:13:42,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/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 [2020-12-09 16:13:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 16:13:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:13:43,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:13:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 16:13:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:13:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 16:13:43,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:13:43,205 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 16:13:43,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:13:43 BoogieIcfgContainer [2020-12-09 16:13:43,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:13:43,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:13:43,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:13:43,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:13:43,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:13:42" (1/3) ... [2020-12-09 16:13:43,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691154f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:13:43, skipping insertion in model container [2020-12-09 16:13:43,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:13:42" (2/3) ... [2020-12-09 16:13:43,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691154f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:13:43, skipping insertion in model container [2020-12-09 16:13:43,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:13:43" (3/3) ... [2020-12-09 16:13:43,213 INFO L111 eAbstractionObserver]: Analyzing ICFG HeizmannHoenickeLeikePodelski-ATVA2013-Fig7.c [2020-12-09 16:13:43,223 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:13:43,225 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 16:13:43,233 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 16:13:43,250 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:13:43,250 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:13:43,250 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:13:43,250 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:13:43,250 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:13:43,250 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:13:43,250 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:13:43,250 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:13:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-09 16:13:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 16:13:43,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:13:43,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 16:13:43,264 INFO L429 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]=== [2020-12-09 16:13:43,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:13:43,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2570507, now seen corresponding path program 1 times [2020-12-09 16:13:43,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:13:43,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922973119] [2020-12-09 16:13:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:13:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:13:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:13:43,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922973119] [2020-12-09 16:13:43,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:13:43,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:13:43,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658309324] [2020-12-09 16:13:43,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:13:43,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:13:43,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:13:43,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:13:43,414 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2020-12-09 16:13:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:13:43,458 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-09 16:13:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:13:43,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 16:13:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:13:43,467 INFO L225 Difference]: With dead ends: 38 [2020-12-09 16:13:43,467 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 16:13:43,470 INFO L677 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 [2020-12-09 16:13:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 16:13:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-12-09 16:13:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 16:13:43,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-09 16:13:43,497 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 4 [2020-12-09 16:13:43,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:13:43,498 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-09 16:13:43,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:13:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-09 16:13:43,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 16:13:43,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:13:43,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 16:13:43,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 16:13:43,499 INFO L429 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]=== [2020-12-09 16:13:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:13:43,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1824604071, now seen corresponding path program 1 times [2020-12-09 16:13:43,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:13:43,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691515591] [2020-12-09 16:13:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:13:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:13:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:13:43,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691515591] [2020-12-09 16:13:43,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:13:43,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:13:43,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264529771] [2020-12-09 16:13:43,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:13:43,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:13:43,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:13:43,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:13:43,538 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2020-12-09 16:13:43,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:13:43,553 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-09 16:13:43,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:13:43,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 16:13:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:13:43,554 INFO L225 Difference]: With dead ends: 30 [2020-12-09 16:13:43,554 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 16:13:43,555 INFO L677 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 [2020-12-09 16:13:43,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 16:13:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 16:13:43,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 16:13:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 16:13:43,560 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2020-12-09 16:13:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:13:43,560 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 16:13:43,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:13:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 16:13:43,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 16:13:43,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:13:43,560 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-09 16:13:43,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 16:13:43,561 INFO L429 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]=== [2020-12-09 16:13:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:13:43,562 INFO L82 PathProgramCache]: Analyzing trace with hash -731385565, now seen corresponding path program 1 times [2020-12-09 16:13:43,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:13:43,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294073103] [2020-12-09 16:13:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:13:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:13:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:13:43,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294073103] [2020-12-09 16:13:43,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034156890] [2020-12-09 16:13:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/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 [2020-12-09 16:13:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:13:43,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 16:13:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:13:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:13:43,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:13:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:13:43,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1844601470] [2020-12-09 16:13:43,750 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 16:13:43,750 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:13:43,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:13:43,758 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:13:43,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:13:44,126 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:13:44,351 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:13:44,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 16:13:44,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2020-12-09 16:13:44,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071381257] [2020-12-09 16:13:44,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 16:13:44,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:13:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 16:13:44,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-12-09 16:13:44,353 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2020-12-09 16:13:44,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:13:44,457 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-12-09 16:13:44,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 16:13:44,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2020-12-09 16:13:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:13:44,458 INFO L225 Difference]: With dead ends: 63 [2020-12-09 16:13:44,458 INFO L226 Difference]: Without dead ends: 62 [2020-12-09 16:13:44,459 INFO L677 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 [2020-12-09 16:13:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-09 16:13:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 28. [2020-12-09 16:13:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 16:13:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-09 16:13:44,463 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7 [2020-12-09 16:13:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:13:44,464 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-09 16:13:44,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 16:13:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-09 16:13:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 16:13:44,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:13:44,464 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 16:13:44,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 16:13:44,666 INFO L429 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]=== [2020-12-09 16:13:44,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:13:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1198115984, now seen corresponding path program 1 times [2020-12-09 16:13:44,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:13:44,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25944387] [2020-12-09 16:13:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:13:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:13:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:13:44,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25944387] [2020-12-09 16:13:44,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51725898] [2020-12-09 16:13:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/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 [2020-12-09 16:13:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:13:44,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 16:13:44,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:13:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:13:44,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:13:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:13:44,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 16:13:44,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 11 [2020-12-09 16:13:44,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442368851] [2020-12-09 16:13:44,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 16:13:44,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:13:44,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 16:13:44,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-09 16:13:44,914 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 10 states. [2020-12-09 16:13:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:13:44,945 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-09 16:13:44,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:13:44,945 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2020-12-09 16:13:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:13:44,947 INFO L225 Difference]: With dead ends: 28 [2020-12-09 16:13:44,947 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 16:13:44,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-12-09 16:13:44,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 16:13:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-09 16:13:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 16:13:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-09 16:13:44,950 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2020-12-09 16:13:44,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:13:44,951 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-09 16:13:44,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 16:13:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-09 16:13:44,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:13:44,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:13:44,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:13:45,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-09 16:13:45,153 INFO L429 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]=== [2020-12-09 16:13:45,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:13:45,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1513214577, now seen corresponding path program 1 times [2020-12-09 16:13:45,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:13:45,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085122433] [2020-12-09 16:13:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:13:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:13:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 16:13:45,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085122433] [2020-12-09 16:13:45,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:13:45,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:13:45,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826652934] [2020-12-09 16:13:45,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:13:45,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:13:45,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:13:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:13:45,232 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-12-09 16:13:45,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:13:45,336 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-12-09 16:13:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:13:45,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-09 16:13:45,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:13:45,338 INFO L225 Difference]: With dead ends: 37 [2020-12-09 16:13:45,338 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 16:13:45,339 INFO L677 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 [2020-12-09 16:13:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 16:13:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-12-09 16:13:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 16:13:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-09 16:13:45,345 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 9 [2020-12-09 16:13:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:13:45,346 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-09 16:13:45,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:13:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-09 16:13:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 16:13:45,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:13:45,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:13:45,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-09 16:13:45,347 INFO L429 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]=== [2020-12-09 16:13:45,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:13:45,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1794702509, now seen corresponding path program 1 times [2020-12-09 16:13:45,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:13:45,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310357036] [2020-12-09 16:13:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:13:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:13:45,364 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:13:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:13:45,378 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:13:45,392 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 16:13:45,393 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 16:13:45,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-09 16:13:45,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:13:45 BoogieIcfgContainer [2020-12-09 16:13:45,413 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:13:45,413 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:13:45,413 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:13:45,414 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:13:45,414 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:13:43" (3/4) ... [2020-12-09 16:13:45,416 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 16:13:45,449 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cb545763-fccd-433d-95db-1f12ed689326/bin/utaipan/witness.graphml [2020-12-09 16:13:45,449 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:13:45,450 INFO L168 Benchmark]: Toolchain (without parser) took 2677.63 ms. Allocated memory was 102.8 MB in the beginning and 132.1 MB in the end (delta: 29.4 MB). Free memory was 62.3 MB in the beginning and 89.8 MB in the end (delta: -27.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:45,450 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 102.8 MB. Free memory is still 78.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:13:45,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.76 ms. Allocated memory is still 102.8 MB. Free memory was 62.2 MB in the beginning and 81.4 MB in the end (delta: -19.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:45,451 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.33 ms. Allocated memory is still 102.8 MB. Free memory was 81.4 MB in the beginning and 80.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:45,452 INFO L168 Benchmark]: Boogie Preprocessor took 14.51 ms. Allocated memory is still 102.8 MB. Free memory was 80.0 MB in the beginning and 78.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:13:45,452 INFO L168 Benchmark]: RCFGBuilder took 241.70 ms. Allocated memory is still 102.8 MB. Free memory was 78.9 MB in the beginning and 72.9 MB in the end (delta: 5.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:45,453 INFO L168 Benchmark]: TraceAbstraction took 2205.10 ms. Allocated memory was 102.8 MB in the beginning and 132.1 MB in the end (delta: 29.4 MB). Free memory was 72.5 MB in the beginning and 90.8 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:45,453 INFO L168 Benchmark]: Witness Printer took 35.57 ms. Allocated memory is still 132.1 MB. Free memory was 90.8 MB in the beginning and 89.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:13:45,456 INFO L339 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 102.8 MB. Free memory is still 78.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 150.76 ms. Allocated memory is still 102.8 MB. Free memory was 62.2 MB in the beginning and 81.4 MB in the end (delta: -19.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.33 ms. Allocated memory is still 102.8 MB. Free memory was 81.4 MB in the beginning and 80.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.51 ms. Allocated memory is still 102.8 MB. Free memory was 80.0 MB in the beginning and 78.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 241.70 ms. Allocated memory is still 102.8 MB. Free memory was 78.9 MB in the beginning and 72.9 MB in the end (delta: 5.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2205.10 ms. Allocated memory was 102.8 MB in the beginning and 132.1 MB in the end (delta: 29.4 MB). Free memory was 72.5 MB in the beginning and 90.8 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. * Witness Printer took 35.57 ms. Allocated memory is still 132.1 MB. Free memory was 90.8 MB in the beginning and 89.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 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, 0.4s 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, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...