./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test25-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5d33db1882917813547794c8974f871f0a78640e .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 19:16:53,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:16:53,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:16:53,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:16:53,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:16:53,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:16:53,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:16:53,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:16:53,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:16:53,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:16:53,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:16:53,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:16:53,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:16:53,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:16:53,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:16:53,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:16:53,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:16:53,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:16:53,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:16:53,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:16:53,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:16:53,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:16:53,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:16:53,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:16:53,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:16:53,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:16:53,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:16:53,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:16:53,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:16:53,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:16:53,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:16:53,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:16:53,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:16:53,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:16:53,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:16:53,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:16:53,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:16:53,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:16:53,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:16:53,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:16:53,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:16:53,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 19:16:53,341 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:16:53,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:16:53,342 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 19:16:53,342 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 19:16:53,342 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 19:16:53,342 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 19:16:53,342 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 19:16:53,342 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 19:16:53,343 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 19:16:53,343 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 19:16:53,343 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 19:16:53,343 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 19:16:53,343 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 19:16:53,343 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 19:16:53,343 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 19:16:53,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:16:53,344 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 19:16:53,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 19:16:53,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 19:16:53,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:16:53,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:16:53,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:16:53,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:16:53,344 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 19:16:53,345 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 19:16:53,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:16:53,345 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:16:53,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:16:53,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:16:53,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:16:53,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:16:53,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:16:53,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:16:53,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:16:53,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:16:53,346 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 19:16:53,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 19:16:53,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:16:53,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:16:53,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 19:16:53,347 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_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d33db1882917813547794c8974f871f0a78640e [2019-12-07 19:16:53,446 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:16:53,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:16:53,456 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:16:53,457 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:16:53,457 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:16:53,457 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/../../sv-benchmarks/c/ldv-regression/test25-2.c [2019-12-07 19:16:53,493 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/data/2f8d0c2a1/127a62739a864417908582abd8ff3039/FLAGce7489f36 [2019-12-07 19:16:53,925 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:16:53,926 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/sv-benchmarks/c/ldv-regression/test25-2.c [2019-12-07 19:16:53,930 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/data/2f8d0c2a1/127a62739a864417908582abd8ff3039/FLAGce7489f36 [2019-12-07 19:16:53,938 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/data/2f8d0c2a1/127a62739a864417908582abd8ff3039 [2019-12-07 19:16:53,940 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:16:53,941 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:16:53,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:16:53,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:16:53,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:16:53,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:16:53" (1/1) ... [2019-12-07 19:16:53,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304a0bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:53, skipping insertion in model container [2019-12-07 19:16:53,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:16:53" (1/1) ... [2019-12-07 19:16:53,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:16:53,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:16:54,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:16:54,118 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:16:54,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:16:54,142 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:16:54,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54 WrapperNode [2019-12-07 19:16:54,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:16:54,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:16:54,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:16:54,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:16:54,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54" (1/1) ... [2019-12-07 19:16:54,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54" (1/1) ... [2019-12-07 19:16:54,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:16:54,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:16:54,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:16:54,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:16:54,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54" (1/1) ... [2019-12-07 19:16:54,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54" (1/1) ... [2019-12-07 19:16:54,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54" (1/1) ... [2019-12-07 19:16:54,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54" (1/1) ... [2019-12-07 19:16:54,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54" (1/1) ... [2019-12-07 19:16:54,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54" (1/1) ... [2019-12-07 19:16:54,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54" (1/1) ... [2019-12-07 19:16:54,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:16:54,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:16:54,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:16:54,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:16:54,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/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 19:16:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 19:16:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 19:16:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:16:54,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:16:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 19:16:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 19:16:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 19:16:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 19:16:54,421 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:16:54,421 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 19:16:54,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:16:54 BoogieIcfgContainer [2019-12-07 19:16:54,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:16:54,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:16:54,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:16:54,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:16:54,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:16:53" (1/3) ... [2019-12-07 19:16:54,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a85fa23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:16:54, skipping insertion in model container [2019-12-07 19:16:54,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:54" (2/3) ... [2019-12-07 19:16:54,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a85fa23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:16:54, skipping insertion in model container [2019-12-07 19:16:54,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:16:54" (3/3) ... [2019-12-07 19:16:54,427 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2019-12-07 19:16:54,434 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:16:54,438 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 19:16:54,445 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 19:16:54,461 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:16:54,462 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:16:54,462 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:16:54,462 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:16:54,462 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:16:54,462 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:16:54,462 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:16:54,462 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:16:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-12-07 19:16:54,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 19:16:54,474 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:54,475 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:16:54,475 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:16:54,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:54,479 INFO L82 PathProgramCache]: Analyzing trace with hash -747952373, now seen corresponding path program 1 times [2019-12-07 19:16:54,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:54,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632460501] [2019-12-07 19:16:54,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:54,577 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 19:16:54,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632460501] [2019-12-07 19:16:54,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:16:54,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 19:16:54,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528283447] [2019-12-07 19:16:54,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 19:16:54,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 19:16:54,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 19:16:54,592 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2019-12-07 19:16:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:16:54,611 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2019-12-07 19:16:54,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 19:16:54,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-12-07 19:16:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:16:54,619 INFO L225 Difference]: With dead ends: 25 [2019-12-07 19:16:54,619 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 19:16:54,621 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 19:16:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 19:16:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 19:16:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 19:16:54,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-12-07 19:16:54,642 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-12-07 19:16:54,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:16:54,642 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 19:16:54,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 19:16:54,642 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-12-07 19:16:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 19:16:54,642 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:54,642 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:16:54,643 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:16:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:54,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1728309126, now seen corresponding path program 1 times [2019-12-07 19:16:54,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:54,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435942482] [2019-12-07 19:16:54,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:16:54,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435942482] [2019-12-07 19:16:54,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737549219] [2019-12-07 19:16:54,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/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 19:16:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:54,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 19:16:54,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:16:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:16:54,746 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:16:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:16:54,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501298154] [2019-12-07 19:16:54,775 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 19:16:54,775 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 19:16:54,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 19:16:54,783 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 19:16:54,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 19:16:55,329 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 19:16:55,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 19:16:55,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 10 [2019-12-07 19:16:55,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719913983] [2019-12-07 19:16:55,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 19:16:55,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:55,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 19:16:55,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 19:16:55,760 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2019-12-07 19:16:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:16:55,798 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-12-07 19:16:55,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 19:16:55,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-07 19:16:55,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:16:55,799 INFO L225 Difference]: With dead ends: 17 [2019-12-07 19:16:55,799 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 19:16:55,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 19:16:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 19:16:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 19:16:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 19:16:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-12-07 19:16:55,803 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-12-07 19:16:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:16:55,803 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-12-07 19:16:55,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 19:16:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-12-07 19:16:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 19:16:55,804 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:55,804 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:16:56,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:16:56,005 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:16:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1218964959, now seen corresponding path program 1 times [2019-12-07 19:16:56,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:56,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836070683] [2019-12-07 19:16:56,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 19:16:56,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836070683] [2019-12-07 19:16:56,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897924522] [2019-12-07 19:16:56,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/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 19:16:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:56,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 19:16:56,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:16:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 19:16:56,125 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:16:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 19:16:56,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573739522] [2019-12-07 19:16:56,145 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 19:16:56,145 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 19:16:56,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 19:16:56,146 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 19:16:56,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 19:16:56,647 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 19:16:57,041 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 19:16:57,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 19:16:57,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2019-12-07 19:16:57,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111590942] [2019-12-07 19:16:57,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 19:16:57,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:57,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 19:16:57,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 19:16:57,042 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2019-12-07 19:16:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:16:57,055 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-12-07 19:16:57,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 19:16:57,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-12-07 19:16:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:16:57,055 INFO L225 Difference]: With dead ends: 26 [2019-12-07 19:16:57,055 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 19:16:57,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 19:16:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 19:16:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 19:16:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 19:16:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-12-07 19:16:57,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2019-12-07 19:16:57,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:16:57,058 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-12-07 19:16:57,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 19:16:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-12-07 19:16:57,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 19:16:57,059 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:57,059 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:16:57,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:16:57,260 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:16:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1875578676, now seen corresponding path program 2 times [2019-12-07 19:16:57,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:57,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947727055] [2019-12-07 19:16:57,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 19:16:57,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947727055] [2019-12-07 19:16:57,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143712640] [2019-12-07 19:16:57,381 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:16:57,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 19:16:57,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:16:57,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 19:16:57,430 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:16:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 19:16:57,488 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:16:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 19:16:57,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [683266276] [2019-12-07 19:16:57,533 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 19:16:57,533 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 19:16:57,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 19:16:57,534 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 19:16:57,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 19:16:57,881 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 19:16:58,311 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 19:16:58,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 19:16:58,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2019-12-07 19:16:58,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058310020] [2019-12-07 19:16:58,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 19:16:58,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:58,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 19:16:58,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2019-12-07 19:16:58,313 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 14 states. [2019-12-07 19:17:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:17:01,703 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-12-07 19:17:01,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 19:17:01,703 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2019-12-07 19:17:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:17:01,704 INFO L225 Difference]: With dead ends: 33 [2019-12-07 19:17:01,704 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 19:17:01,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=91, Invalid=460, Unknown=1, NotChecked=0, Total=552 [2019-12-07 19:17:01,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 19:17:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 19:17:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 19:17:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-12-07 19:17:01,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2019-12-07 19:17:01,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:17:01,708 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-12-07 19:17:01,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 19:17:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-12-07 19:17:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 19:17:01,708 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:17:01,708 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:17:01,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:17:01,909 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:17:01,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:17:01,910 INFO L82 PathProgramCache]: Analyzing trace with hash 398796338, now seen corresponding path program 3 times [2019-12-07 19:17:01,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:17:01,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572065692] [2019-12-07 19:17:01,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:17:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:17:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-12-07 19:17:01,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572065692] [2019-12-07 19:17:01,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312815187] [2019-12-07 19:17:01,964 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:17:01,991 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 19:17:01,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:17:01,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 19:17:01,993 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:17:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 19:17:12,147 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:17:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 19:17:12,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [377261516] [2019-12-07 19:17:12,250 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 19:17:12,251 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 19:17:12,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 19:17:12,251 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 19:17:12,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 19:17:12,591 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 19:17:13,121 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 19:17:13,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 19:17:13,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2019-12-07 19:17:13,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532105378] [2019-12-07 19:17:13,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 19:17:13,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:17:13,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 19:17:13,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=582, Unknown=5, NotChecked=0, Total=702 [2019-12-07 19:17:13,123 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 21 states. [2019-12-07 19:17:16,176 WARN L192 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2019-12-07 19:17:20,224 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 30 [2019-12-07 19:17:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:17:25,477 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-12-07 19:17:25,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-07 19:17:25,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2019-12-07 19:17:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:17:25,478 INFO L225 Difference]: With dead ends: 52 [2019-12-07 19:17:25,478 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 19:17:25,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=291, Invalid=1262, Unknown=7, NotChecked=0, Total=1560 [2019-12-07 19:17:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 19:17:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-07 19:17:25,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 19:17:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-12-07 19:17:25,483 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 22 [2019-12-07 19:17:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:17:25,483 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-12-07 19:17:25,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 19:17:25,484 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-12-07 19:17:25,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 19:17:25,484 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:17:25,484 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:17:25,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:17:25,685 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:17:25,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:17:25,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1721469383, now seen corresponding path program 4 times [2019-12-07 19:17:25,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:17:25,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851120170] [2019-12-07 19:17:25,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:17:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:17:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-12-07 19:17:25,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851120170] [2019-12-07 19:17:25,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846562111] [2019-12-07 19:17:25,768 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:17:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:17:25,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 19:17:25,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:17:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-12-07 19:17:25,817 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:17:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-12-07 19:17:25,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037112093] [2019-12-07 19:17:25,860 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 19:17:25,860 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 19:17:25,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 19:17:25,861 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 19:17:25,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 19:17:26,205 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 19:17:26,756 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2019-12-07 19:17:26,756 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 19:17:26,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 19:17:26,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2019-12-07 19:17:26,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255143410] [2019-12-07 19:17:26,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 19:17:26,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:17:26,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 19:17:26,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-07 19:17:26,758 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2019-12-07 19:17:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:17:26,798 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2019-12-07 19:17:26,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 19:17:26,799 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-12-07 19:17:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:17:26,799 INFO L225 Difference]: With dead ends: 68 [2019-12-07 19:17:26,800 INFO L226 Difference]: Without dead ends: 40 [2019-12-07 19:17:26,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 16 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-07 19:17:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-07 19:17:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-07 19:17:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 19:17:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-12-07 19:17:26,808 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2019-12-07 19:17:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:17:26,808 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-12-07 19:17:26,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 19:17:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-12-07 19:17:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 19:17:26,809 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:17:26,810 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:17:27,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:17:27,010 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:17:27,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:17:27,011 INFO L82 PathProgramCache]: Analyzing trace with hash 914648327, now seen corresponding path program 5 times [2019-12-07 19:17:27,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:17:27,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651150592] [2019-12-07 19:17:27,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:17:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:17:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-07 19:17:28,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651150592] [2019-12-07 19:17:28,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357518467] [2019-12-07 19:17:28,183 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:17:28,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 19:17:28,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 19:17:28,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 19:17:28,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:17:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-12-07 19:17:28,510 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:17:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-12-07 19:17:28,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1633381018] [2019-12-07 19:17:28,682 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 19:17:28,682 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 19:17:28,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 19:17:28,682 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 19:17:28,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 19:17:29,032 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 19:17:30,373 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2019-12-07 19:17:30,374 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 19:17:30,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 19:17:30,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 8] total 31 [2019-12-07 19:17:30,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623628202] [2019-12-07 19:17:30,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-07 19:17:30,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:17:30,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-07 19:17:30,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 19:17:30,377 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 31 states. [2019-12-07 19:17:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:17:31,003 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2019-12-07 19:17:31,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 19:17:31,003 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2019-12-07 19:17:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:17:31,004 INFO L225 Difference]: With dead ends: 40 [2019-12-07 19:17:31,004 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 19:17:31,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 94 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 19:17:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 19:17:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 19:17:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 19:17:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 19:17:31,005 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2019-12-07 19:17:31,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:17:31,006 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 19:17:31,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-07 19:17:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 19:17:31,006 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 19:17:31,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:17:31,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 19:17:31,278 INFO L242 CegarLoopResult]: At program point L27-3(lines 27 30) the Hoare annotation is: (and (<= 0 |#StackHeapBarrier|) (<= 0 (+ ULTIMATE.start_main_~i~0 2147483648)) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#cont~0.base|) (<= |ULTIMATE.start_main_~#array~0.offset| 0) (<= 0 |#NULL.base|) (<= 0 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array~0.offset|) (<= 0 |ULTIMATE.start_main_~#array~0.base|) (= 0 |ULTIMATE.start_main_~#cont~0.offset|)) [2019-12-07 19:17:31,279 INFO L246 CegarLoopResult]: For program point L27-4(lines 21 50) no Hoare annotation was computed. [2019-12-07 19:17:31,279 INFO L246 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2019-12-07 19:17:31,279 INFO L246 CegarLoopResult]: For program point L32(lines 32 44) no Hoare annotation was computed. [2019-12-07 19:17:31,279 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 19:17:31,279 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) no Hoare annotation was computed. [2019-12-07 19:17:31,279 INFO L249 CegarLoopResult]: At program point L49(lines 20 50) the Hoare annotation is: true [2019-12-07 19:17:31,279 INFO L242 CegarLoopResult]: At program point L41(lines 21 50) the Hoare annotation is: false [2019-12-07 19:17:31,279 INFO L246 CegarLoopResult]: For program point L37-1(lines 37 39) no Hoare annotation was computed. [2019-12-07 19:17:31,279 INFO L242 CegarLoopResult]: At program point L37-3(lines 37 39) the Hoare annotation is: (and (= ULTIMATE.start_main_~pa~0.offset (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#cont~0.base|) |ULTIMATE.start_main_~#cont~0.offset|) 4)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#cont~0.base|) |ULTIMATE.start_main_~#cont~0.offset|) ULTIMATE.start_main_~pa~0.base) (<= ULTIMATE.start_main_~i~0 (select (select |#memory_int| ULTIMATE.start_main_~pa~0.base) ULTIMATE.start_main_~pa~0.offset)) (= 0 |ULTIMATE.start_main_~#cont~0.offset|)) [2019-12-07 19:17:31,279 INFO L242 CegarLoopResult]: At program point L37-4(lines 37 39) the Hoare annotation is: (let ((.cse2 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#cont~0.base|) |ULTIMATE.start_main_~#cont~0.offset|)) (.cse1 (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#cont~0.base|) |ULTIMATE.start_main_~#cont~0.offset|) 4))) (let ((.cse0 (select (select |#memory_int| .cse2) .cse1))) (and (<= .cse0 ULTIMATE.start_main_~i~0) (= ULTIMATE.start_main_~pa~0.offset .cse1) (= .cse2 ULTIMATE.start_main_~pa~0.base) (<= ULTIMATE.start_main_~i~0 .cse0) (= 0 |ULTIMATE.start_main_~#cont~0.offset|)))) [2019-12-07 19:17:31,279 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 19:17:31,279 INFO L246 CegarLoopResult]: For program point L35(lines 35 43) no Hoare annotation was computed. [2019-12-07 19:17:31,287 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,287 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,288 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,288 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,288 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,288 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,289 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 19:17:31,289 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,290 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,290 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,290 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,290 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 19:17:31,290 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,290 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,291 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,291 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,291 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,292 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,292 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,292 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,292 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 19:17:31,292 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,292 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,292 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,293 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,293 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 19:17:31,293 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,293 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,293 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,294 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,294 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,294 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,294 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 19:17:31,294 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,295 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,295 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,295 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,295 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 19:17:31,296 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-12-07 19:17:31,296 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-12-07 19:17:31,296 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-12-07 19:17:31,296 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-12-07 19:17:31,297 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-12-07 19:17:31,297 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-12-07 19:17:31,297 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-12-07 19:17:31,297 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-12-07 19:17:31,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:17:31 BoogieIcfgContainer [2019-12-07 19:17:31,299 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:17:31,299 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:17:31,299 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:17:31,299 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:17:31,300 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:16:54" (3/4) ... [2019-12-07 19:17:31,302 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 19:17:31,308 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2019-12-07 19:17:31,308 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 19:17:31,308 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 19:17:31,336 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_59eb914c-a0e5-411a-a8e7-676eb59fb415/bin/utaipan/witness.graphml [2019-12-07 19:17:31,336 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:17:31,337 INFO L168 Benchmark]: Toolchain (without parser) took 37395.79 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 227.5 MB). Free memory was 940.7 MB in the beginning and 1.0 GB in the end (delta: -85.7 MB). Peak memory consumption was 141.9 MB. Max. memory is 11.5 GB. [2019-12-07 19:17:31,337 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 959.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:17:31,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 201.44 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.2 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -157.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-12-07 19:17:31,338 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.65 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 19:17:31,338 INFO L168 Benchmark]: Boogie Preprocessor took 17.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 19:17:31,338 INFO L168 Benchmark]: RCFGBuilder took 230.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. [2019-12-07 19:17:31,338 INFO L168 Benchmark]: TraceAbstraction took 36875.85 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 125.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 41.6 MB). Peak memory consumption was 166.9 MB. Max. memory is 11.5 GB. [2019-12-07 19:17:31,338 INFO L168 Benchmark]: Witness Printer took 36.80 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 19:17:31,340 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 959.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 201.44 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.2 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -157.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.65 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 230.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 36875.85 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 125.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 41.6 MB). Peak memory consumption was 166.9 MB. Max. memory is 11.5 GB. * Witness Printer took 36.80 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant [2019-12-07 19:17:31,343 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,343 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,343 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,343 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,343 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,344 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,344 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 19:17:31,344 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,344 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,344 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,344 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,344 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 19:17:31,344 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,345 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,345 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,345 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,345 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,345 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,345 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,345 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 19:17:31,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 19:17:31,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,346 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ Derived loop invariant: (((unknown-#memory_int-unknown[#memory_$Pointer$[cont][cont]][#memory_$Pointer$[cont][cont] + 4] <= i && pa == #memory_$Pointer$[cont][cont] + 4) && #memory_$Pointer$[cont][cont] == pa) && i <= unknown-#memory_int-unknown[#memory_$Pointer$[cont][cont]][#memory_$Pointer$[cont][cont] + 4]) && 0 == cont - InvariantResult [Line: 37]: Loop Invariant [2019-12-07 19:17:31,347 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,347 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,347 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,347 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,347 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-12-07 19:17:31,347 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2019-12-07 19:17:31,348 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2019-12-07 19:17:31,348 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,348 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2019-12-07 19:17:31,348 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((pa == #memory_$Pointer$[cont][cont] + 4 && #memory_$Pointer$[cont][cont] == pa) && i <= unknown-#memory_int-unknown[pa][pa]) && 0 == cont - InvariantResult [Line: 27]: Loop Invariant [2019-12-07 19:17:31,348 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-12-07 19:17:31,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-12-07 19:17:31,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-12-07 19:17:31,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-12-07 19:17:31,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-12-07 19:17:31,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-12-07 19:17:31,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-12-07 19:17:31,349 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: ((((((((((0 <= unknown-#StackHeapBarrier-unknown && 0 <= i + 2147483648) && #NULL <= 0) && 0 <= cont) && array <= 0) && 0 <= #NULL) && 0 <= j) && i <= 2147483647) && #NULL == 0) && 0 <= array) && 0 <= array) && 0 == cont - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Result: SAFE, OverallTime: 36.7s, OverallIterations: 7, TraceHistogramMax: 11, AutomataDifference: 16.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 33 SDslu, 166 SDs, 0 SdLazy, 377 SolverSat, 42 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 470 GetRequests, 288 SyntacticMatches, 43 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 28.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=6, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 28 NumberOfFragments, 122 HoareAnnotationTreeSize, 5 FomulaSimplifications, 1065 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 197 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 12.0s InterpolantComputationTime, 274 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 388 ConstructedInterpolants, 12 QuantifiedInterpolants, 95547 SizeOfPredicates, 69 NumberOfNonLiveVariables, 625 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 735/1041 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 555, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 7, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME[ms]: 439, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 9, TOOLS_QUANTIFIERELIM_TIME[ms]: 435, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 191, FLUID_QUERY_TIME[ms]: 2, FLUID_QUERIES: 23, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 67, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 6, DOMAIN_ISBOTTOM_APPLICATIONS: 7, DOMAIN_ISBOTTOM_TIME[ms]: 10, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 406, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 406, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 6, DAG_COMPRESSION_PROCESSED_NODES: 72, DAG_COMPRESSION_RETAINED_NODES: 26, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...