./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 63816408f16166958351bc134d9ad3d8551cdcd0 ................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:08:23,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:08:23,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:08:23,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:08:23,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:08:23,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:08:23,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:08:23,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:08:23,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:08:23,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:08:23,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:08:23,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:08:23,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:08:23,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:08:23,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:08:23,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:08:23,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:08:23,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:08:23,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:08:23,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:08:23,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:08:23,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:08:23,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:08:23,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:08:23,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:08:23,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:08:23,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:08:23,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:08:23,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:08:23,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:08:23,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:08:23,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:08:23,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:08:23,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:08:23,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:08:23,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:08:23,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:08:23,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:08:23,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:08:23,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:08:23,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:08:23,210 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 11:08:23,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:08:23,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:08:23,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:08:23,229 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:08:23,229 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:08:23,229 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:08:23,229 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 11:08:23,229 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:08:23,229 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:08:23,230 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 11:08:23,230 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 11:08:23,230 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:08:23,230 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 11:08:23,230 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 11:08:23,230 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 11:08:23,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:08:23,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:08:23,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:08:23,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:08:23,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:08:23,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 11:08:23,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:08:23,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 11:08:23,232 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:08:23,232 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:08:23,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 11:08:23,232 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:08:23,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 11:08:23,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:08:23,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:08:23,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:08:23,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:08:23,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:08:23,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 11:08:23,233 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 11:08:23,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 11:08:23,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 11:08:23,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:08:23,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:08:23,234 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63816408f16166958351bc134d9ad3d8551cdcd0 [2020-12-09 11:08:23,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:08:23,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:08:23,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:08:23,428 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:08:23,428 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:08:23,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/../../sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i [2020-12-09 11:08:23,471 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/data/7f2b79a5e/50165b6f30d54277900f4cd150656cbc/FLAG851cba6e2 [2020-12-09 11:08:23,853 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:08:23,853 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i [2020-12-09 11:08:23,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/data/7f2b79a5e/50165b6f30d54277900f4cd150656cbc/FLAG851cba6e2 [2020-12-09 11:08:23,869 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/data/7f2b79a5e/50165b6f30d54277900f4cd150656cbc [2020-12-09 11:08:23,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:08:23,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:08:23,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:08:23,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:08:23,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:08:23,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:08:23" (1/1) ... [2020-12-09 11:08:23,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb2cd20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:23, skipping insertion in model container [2020-12-09 11:08:23,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:08:23" (1/1) ... [2020-12-09 11:08:23,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:08:23,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:08:23,990 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i[825,838] [2020-12-09 11:08:24,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:08:24,006 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:08:24,015 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/sv-benchmarks/c/loops/veris.c_NetBSD-libc_loop.i[825,838] [2020-12-09 11:08:24,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:08:24,029 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:08:24,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24 WrapperNode [2020-12-09 11:08:24,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:08:24,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:08:24,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:08:24,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:08:24,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24" (1/1) ... [2020-12-09 11:08:24,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24" (1/1) ... [2020-12-09 11:08:24,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:08:24,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:08:24,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:08:24,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:08:24,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24" (1/1) ... [2020-12-09 11:08:24,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24" (1/1) ... [2020-12-09 11:08:24,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24" (1/1) ... [2020-12-09 11:08:24,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24" (1/1) ... [2020-12-09 11:08:24,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24" (1/1) ... [2020-12-09 11:08:24,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24" (1/1) ... [2020-12-09 11:08:24,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24" (1/1) ... [2020-12-09 11:08:24,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:08:24,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:08:24,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:08:24,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:08:24,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:08:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 11:08:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:08:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 11:08:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:08:24,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:08:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 11:08:24,325 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:08:24,325 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 11:08:24,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:08:24 BoogieIcfgContainer [2020-12-09 11:08:24,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:08:24,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:08:24,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:08:24,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:08:24,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:08:23" (1/3) ... [2020-12-09 11:08:24,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484344c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:08:24, skipping insertion in model container [2020-12-09 11:08:24,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:08:24" (2/3) ... [2020-12-09 11:08:24,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484344c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:08:24, skipping insertion in model container [2020-12-09 11:08:24,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:08:24" (3/3) ... [2020-12-09 11:08:24,333 INFO L111 eAbstractionObserver]: Analyzing ICFG veris.c_NetBSD-libc_loop.i [2020-12-09 11:08:24,342 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:08:24,344 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 11:08:24,351 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 11:08:24,367 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:08:24,367 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 11:08:24,367 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:08:24,367 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:08:24,367 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:08:24,367 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:08:24,367 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:08:24,367 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:08:24,375 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-12-09 11:08:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 11:08:24,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:08:24,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 11:08:24,379 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:08:24,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:08:24,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1916652, now seen corresponding path program 1 times [2020-12-09 11:08:24,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:08:24,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963542488] [2020-12-09 11:08:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:08:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:08:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:08:24,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963542488] [2020-12-09 11:08:24,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:08:24,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 11:08:24,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488712549] [2020-12-09 11:08:24,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:08:24,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:08:24,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:08:24,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:08:24,543 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-12-09 11:08:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:08:24,578 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2020-12-09 11:08:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 11:08:24,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 11:08:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:08:24,585 INFO L225 Difference]: With dead ends: 17 [2020-12-09 11:08:24,585 INFO L226 Difference]: Without dead ends: 9 [2020-12-09 11:08:24,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:08:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-09 11:08:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2020-12-09 11:08:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 11:08:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-09 11:08:24,608 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2020-12-09 11:08:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:08:24,609 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-09 11:08:24,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:08:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-09 11:08:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 11:08:24,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:08:24,609 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-09 11:08:24,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 11:08:24,610 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:08:24,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:08:24,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1269628337, now seen corresponding path program 1 times [2020-12-09 11:08:24,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:08:24,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520592101] [2020-12-09 11:08:24,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:08:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:08:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:08:24,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520592101] [2020-12-09 11:08:24,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559183804] [2020-12-09 11:08:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:08:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:08:24,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 11:08:24,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:08:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:08:24,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:08:24,819 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 11:08:24,831 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 11:08:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:08:24,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [78251237] [2020-12-09 11:08:24,858 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 11:08:24,858 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:08:24,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:08:24,868 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:08:24,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:08:25,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:08:25,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:08:25,515 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:08:25,675 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-12-09 11:08:26,324 WARN L197 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 119 [2020-12-09 11:08:26,961 WARN L197 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 123 [2020-12-09 11:08:27,121 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-12-09 11:08:27,123 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:08:27,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 11:08:27,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2020-12-09 11:08:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330707970] [2020-12-09 11:08:27,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 11:08:27,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:08:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 11:08:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-09 11:08:27,125 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2020-12-09 11:08:27,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:08:27,163 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-09 11:08:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 11:08:27,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2020-12-09 11:08:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:08:27,164 INFO L225 Difference]: With dead ends: 15 [2020-12-09 11:08:27,164 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 11:08:27,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-09 11:08:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 11:08:27,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2020-12-09 11:08:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 11:08:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-09 11:08:27,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2020-12-09 11:08:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:08:27,167 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-09 11:08:27,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 11:08:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-09 11:08:27,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 11:08:27,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:08:27,168 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2020-12-09 11:08:27,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 11:08:27,370 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:08:27,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:08:27,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2021002444, now seen corresponding path program 2 times [2020-12-09 11:08:27,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:08:27,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766771181] [2020-12-09 11:08:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:08:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:08:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 11:08:27,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766771181] [2020-12-09 11:08:27,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600408942] [2020-12-09 11:08:27,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:08:27,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 11:08:27,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 11:08:27,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 11:08:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:08:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 11:08:27,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:08:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 11:08:27,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1062129038] [2020-12-09 11:08:27,555 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 11:08:27,555 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:08:27,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:08:27,555 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:08:27,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:08:27,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:08:27,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:08:27,931 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:08:28,111 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-12-09 11:08:28,656 WARN L197 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 119 [2020-12-09 11:08:29,336 WARN L197 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 117 [2020-12-09 11:08:29,504 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-12-09 11:08:29,505 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:08:29,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 11:08:29,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-12-09 11:08:29,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504704031] [2020-12-09 11:08:29,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:08:29,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:08:29,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:08:29,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-09 11:08:29,506 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-09 11:08:29,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:08:29,540 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-12-09 11:08:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:08:29,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-09 11:08:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:08:29,541 INFO L225 Difference]: With dead ends: 11 [2020-12-09 11:08:29,541 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 11:08:29,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-09 11:08:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 11:08:29,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 11:08:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 11:08:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 11:08:29,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-12-09 11:08:29,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:08:29,542 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 11:08:29,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:08:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 11:08:29,542 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 11:08:29,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-09 11:08:29,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 11:08:29,800 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 11:08:29,800 INFO L258 CegarLoopResult]: At program point L29-3(lines 29 33) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_glob2_~pathlim.base ~tmp~0.base)) (.cse1 (= ~tmp~0.base ULTIMATE.start_glob2_~p~0.base)) (.cse2 (<= ULTIMATE.start_glob2_~pathlim.offset ~tmp~0.offset))) (or (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0 .cse1 .cse2) (and (= ULTIMATE.start_glob2_~p~0.offset 0) (<= 4 ~tmp~0.offset) .cse0 .cse1 .cse2))) [2020-12-09 11:08:29,800 INFO L262 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-12-09 11:08:29,800 INFO L258 CegarLoopResult]: At program point L15-2(lines 14 19) the Hoare annotation is: (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_glob2_~pathlim.base ~tmp~0.base) (= ~tmp~0.base ULTIMATE.start_glob2_~p~0.base) (<= ULTIMATE.start_glob2_~pathlim.offset ~tmp~0.offset)) [2020-12-09 11:08:29,800 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 11:08:29,800 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-09 11:08:29,800 INFO L262 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-09 11:08:29,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:08:29 BoogieIcfgContainer [2020-12-09 11:08:29,811 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:08:29,811 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:08:29,811 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:08:29,811 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:08:29,812 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:08:24" (3/4) ... [2020-12-09 11:08:29,813 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 11:08:29,819 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-09 11:08:29,819 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-09 11:08:29,819 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 11:08:29,819 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 11:08:29,841 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f4b51a4e-60f5-4d6f-8c22-ff6e7600f932/bin/utaipan/witness.graphml [2020-12-09 11:08:29,841 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:08:29,842 INFO L168 Benchmark]: Toolchain (without parser) took 5969.99 ms. Allocated memory was 100.7 MB in the beginning and 188.7 MB in the end (delta: 88.1 MB). Free memory was 60.8 MB in the beginning and 148.0 MB in the end (delta: -87.2 MB). Peak memory consumption was 1.5 MB. Max. memory is 16.1 GB. [2020-12-09 11:08:29,842 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 100.7 MB. Free memory was 77.3 MB in the beginning and 77.2 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:08:29,842 INFO L168 Benchmark]: CACSL2BoogieTranslator took 156.75 ms. Allocated memory is still 100.7 MB. Free memory was 60.7 MB in the beginning and 77.1 MB in the end (delta: -16.4 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-12-09 11:08:29,843 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.18 ms. Allocated memory is still 100.7 MB. Free memory was 77.1 MB in the beginning and 75.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:08:29,843 INFO L168 Benchmark]: Boogie Preprocessor took 15.39 ms. Allocated memory is still 100.7 MB. Free memory was 75.6 MB in the beginning and 74.7 MB in the end (delta: 956.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:08:29,843 INFO L168 Benchmark]: RCFGBuilder took 258.51 ms. Allocated memory is still 100.7 MB. Free memory was 74.7 MB in the beginning and 69.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 11:08:29,844 INFO L168 Benchmark]: TraceAbstraction took 5482.82 ms. Allocated memory was 100.7 MB in the beginning and 188.7 MB in the end (delta: 88.1 MB). Free memory was 69.1 MB in the beginning and 151.2 MB in the end (delta: -82.1 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-12-09 11:08:29,844 INFO L168 Benchmark]: Witness Printer took 29.87 ms. Allocated memory is still 188.7 MB. Free memory was 151.2 MB in the beginning and 148.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:08:29,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 100.7 MB. Free memory was 77.3 MB in the beginning and 77.2 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 156.75 ms. Allocated memory is still 100.7 MB. Free memory was 60.7 MB in the beginning and 77.1 MB in the end (delta: -16.4 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.18 ms. Allocated memory is still 100.7 MB. Free memory was 77.1 MB in the beginning and 75.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.39 ms. Allocated memory is still 100.7 MB. Free memory was 75.6 MB in the beginning and 74.7 MB in the end (delta: 956.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 258.51 ms. Allocated memory is still 100.7 MB. Free memory was 74.7 MB in the beginning and 69.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5482.82 ms. Allocated memory was 100.7 MB in the beginning and 188.7 MB in the end (delta: 88.1 MB). Free memory was 69.1 MB in the beginning and 151.2 MB in the end (delta: -82.1 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Witness Printer took 29.87 ms. Allocated memory is still 188.7 MB. Free memory was 151.2 MB in the beginning and 148.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (((1 <= cond && pathlim == tmp) && tmp == p) && pathlim <= tmp) || ((((p == 0 && 4 <= tmp) && pathlim == tmp) && tmp == p) && pathlim <= tmp) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((1 <= cond && pathlim == tmp) && tmp == p) && pathlim <= tmp - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 15 SDslu, 15 SDs, 0 SdLazy, 29 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 43 HoareAnnotationTreeSize, 2 FomulaSimplifications, 118 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 38 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 2193 SizeOfPredicates, 26 NumberOfNonLiveVariables, 151 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 15/27 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...