./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8 --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 c7a9d89991bb39658ba66b50d9cb80ba7d1aa37f87b1a2f7972fc25c15a1ea38 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:08:31,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:08:31,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:08:31,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:08:31,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:08:31,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:08:31,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:08:31,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:08:31,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:08:31,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:08:31,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:08:31,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:08:31,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:08:31,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:08:31,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:08:31,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:08:31,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:08:31,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:08:31,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:08:31,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:08:31,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:08:31,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:08:31,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:08:31,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:08:31,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:08:31,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:08:31,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:08:31,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:08:31,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:08:31,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:08:31,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:08:31,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:08:31,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:08:31,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:08:31,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:08:31,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:08:31,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:08:31,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:08:31,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:08:31,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:08:31,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:08:31,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:08:31,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:08:31,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:08:31,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:08:31,347 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:08:31,347 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:08:31,348 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:08:31,348 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:08:31,348 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:08:31,349 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:08:31,349 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:08:31,350 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:08:31,350 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:08:31,350 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:08:31,351 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:08:31,351 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:08:31,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:08:31,353 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:08:31,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:08:31,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:08:31,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:08:31,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:08:31,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:08:31,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:08:31,355 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:08:31,355 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:08:31,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:08:31,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:08:31,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:08:31,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:08:31,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:08:31,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:31,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:08:31,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:08:31,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:08:31,367 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:08:31,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:08:31,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:08:31,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:08:31,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:08:31,369 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_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7a9d89991bb39658ba66b50d9cb80ba7d1aa37f87b1a2f7972fc25c15a1ea38 [2021-11-07 02:08:31,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:08:31,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:08:31,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:08:31,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:08:31,697 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:08:31,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i [2021-11-07 02:08:31,816 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/data/b9fb726eb/7c01ce1164394ef4beff6a878bc10ceb/FLAG6f9cd3d0e [2021-11-07 02:08:32,341 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:08:32,342 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i [2021-11-07 02:08:32,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/data/b9fb726eb/7c01ce1164394ef4beff6a878bc10ceb/FLAG6f9cd3d0e [2021-11-07 02:08:32,734 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/data/b9fb726eb/7c01ce1164394ef4beff6a878bc10ceb [2021-11-07 02:08:32,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:08:32,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:08:32,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:32,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:08:32,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:08:32,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:32" (1/1) ... [2021-11-07 02:08:32,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7330ded5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:32, skipping insertion in model container [2021-11-07 02:08:32,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:32" (1/1) ... [2021-11-07 02:08:32,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:08:32,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:08:32,969 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i[950,963] [2021-11-07 02:08:32,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:32,990 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:08:33,001 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i[950,963] [2021-11-07 02:08:33,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:33,020 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:08:33,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33 WrapperNode [2021-11-07 02:08:33,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:33,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:08:33,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:08:33,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:08:33,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33" (1/1) ... [2021-11-07 02:08:33,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33" (1/1) ... [2021-11-07 02:08:33,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:08:33,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:08:33,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:08:33,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:08:33,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33" (1/1) ... [2021-11-07 02:08:33,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33" (1/1) ... [2021-11-07 02:08:33,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33" (1/1) ... [2021-11-07 02:08:33,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33" (1/1) ... [2021-11-07 02:08:33,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33" (1/1) ... [2021-11-07 02:08:33,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33" (1/1) ... [2021-11-07 02:08:33,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33" (1/1) ... [2021-11-07 02:08:33,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:08:33,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:08:33,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:08:33,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:08:33,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33" (1/1) ... [2021-11-07 02:08:33,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:33,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:33,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:08:33,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:08:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:08:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:08:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:08:33,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:08:33,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:08:33,553 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-07 02:08:33,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:33 BoogieIcfgContainer [2021-11-07 02:08:33,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:08:33,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:08:33,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:08:33,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:08:33,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:08:32" (1/3) ... [2021-11-07 02:08:33,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133aeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:33, skipping insertion in model container [2021-11-07 02:08:33,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:33" (2/3) ... [2021-11-07 02:08:33,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133aeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:33, skipping insertion in model container [2021-11-07 02:08:33,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:33" (3/3) ... [2021-11-07 02:08:33,564 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound50.i [2021-11-07 02:08:33,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:08:33,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:08:33,631 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:08:33,640 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:08:33,641 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:08:33,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 02:08:33,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:33,663 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 02:08:33,663 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash 136140001, now seen corresponding path program 1 times [2021-11-07 02:08:33,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:08:33,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611182389] [2021-11-07 02:08:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:33,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:08:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:33,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:08:33,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611182389] [2021-11-07 02:08:33,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611182389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:33,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:33,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 02:08:33,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466612486] [2021-11-07 02:08:33,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:08:33,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:08:33,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:08:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:08:33,860 INFO L87 Difference]: Start difference. First operand has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:33,874 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-11-07 02:08:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:08:33,875 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 02:08:33,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:33,884 INFO L225 Difference]: With dead ends: 25 [2021-11-07 02:08:33,884 INFO L226 Difference]: Without dead ends: 12 [2021-11-07 02:08:33,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:08:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-07 02:08:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-07 02:08:33,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-07 02:08:33,918 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2021-11-07 02:08:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:33,919 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-07 02:08:33,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-07 02:08:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 02:08:33,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:33,920 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 02:08:33,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:08:33,921 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:33,922 INFO L85 PathProgramCache]: Analyzing trace with hash -135046298, now seen corresponding path program 1 times [2021-11-07 02:08:33,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:08:33,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770933378] [2021-11-07 02:08:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:33,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:08:33,945 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 02:08:33,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197690150] [2021-11-07 02:08:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:33,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:33,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:33,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:33,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 02:08:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:34,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:08:34,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:34,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:34,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:08:34,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770933378] [2021-11-07 02:08:34,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:08:34,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197690150] [2021-11-07 02:08:34,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197690150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:34,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:34,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:08:34,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698174674] [2021-11-07 02:08:34,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:08:34,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:08:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:08:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:08:34,505 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:34,587 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-07 02:08:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:08:34,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 02:08:34,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:34,589 INFO L225 Difference]: With dead ends: 22 [2021-11-07 02:08:34,589 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 02:08:34,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:08:34,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 02:08:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-07 02:08:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-07 02:08:34,594 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 6 [2021-11-07 02:08:34,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:34,595 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-07 02:08:34,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-07 02:08:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:08:34,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:34,596 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:34,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:34,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:34,809 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:34,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:34,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1226224711, now seen corresponding path program 1 times [2021-11-07 02:08:34,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:08:34,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731801741] [2021-11-07 02:08:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:34,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:08:34,840 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 02:08:34,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554136875] [2021-11-07 02:08:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:34,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:34,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:34,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:34,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 02:08:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:34,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:08:34,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:34,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:35,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:08:35,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731801741] [2021-11-07 02:08:35,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:08:35,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554136875] [2021-11-07 02:08:35,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554136875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:35,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:35,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:08:35,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192066134] [2021-11-07 02:08:35,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:35,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:08:35,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:35,023 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:35,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:35,057 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-11-07 02:08:35,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:08:35,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 02:08:35,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:35,058 INFO L225 Difference]: With dead ends: 29 [2021-11-07 02:08:35,058 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 02:08:35,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 02:08:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 02:08:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-07 02:08:35,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-11-07 02:08:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:35,063 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-07 02:08:35,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-07 02:08:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 02:08:35,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:35,064 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:35,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 02:08:35,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:35,279 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:35,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1445994540, now seen corresponding path program 1 times [2021-11-07 02:08:35,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:08:35,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013343638] [2021-11-07 02:08:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:35,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:08:35,297 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 02:08:35,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131407999] [2021-11-07 02:08:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:35,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:35,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:35,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:35,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc1f9f2-87fb-41a0-8e4f-d9710a855ade/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process