./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02.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_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/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_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/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_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/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 3ebd5f9cdc53e2fed65e094e0a8b688f7bb2226007ad46e7ae7df20c2e5d5f11 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:59:22,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:59:22,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:59:22,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:59:22,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:59:22,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:59:22,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:59:22,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:59:22,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:59:22,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:59:22,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:59:22,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:59:22,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:59:22,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:59:22,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:59:22,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:59:22,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:59:22,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:59:22,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:59:22,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:59:22,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:59:22,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:59:22,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:59:22,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:59:22,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:59:22,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:59:22,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:59:22,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:59:22,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:59:22,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:59:22,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:59:22,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:59:22,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:59:22,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:59:22,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:59:22,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:59:22,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:59:22,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:59:22,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:59:22,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:59:22,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:59:22,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:59:22,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:59:22,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:59:22,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:59:22,454 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:59:22,454 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:59:22,455 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:59:22,455 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:59:22,455 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:59:22,455 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:59:22,455 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:59:22,456 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:59:22,456 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:59:22,456 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:59:22,457 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:59:22,457 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:59:22,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:59:22,458 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:59:22,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:59:22,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:59:22,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:59:22,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:59:22,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:59:22,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:59:22,460 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:59:22,460 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:59:22,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:59:22,460 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:59:22,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:59:22,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:59:22,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:59:22,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:59:22,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:59:22,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:59:22,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:59:22,462 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:59:22,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:59:22,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:59:22,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:59:22,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:59:22,464 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_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ebd5f9cdc53e2fed65e094e0a8b688f7bb2226007ad46e7ae7df20c2e5d5f11 [2021-11-07 01:59:22,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:59:22,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:59:22,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:59:22,789 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:59:22,790 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:59:22,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/loops/sum01_bug02.i [2021-11-07 01:59:22,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/data/ae73efecc/8745f3a0abae41e396665c8c6ba6fcc0/FLAG1231492aa [2021-11-07 01:59:23,466 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:59:23,466 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/sv-benchmarks/c/loops/sum01_bug02.i [2021-11-07 01:59:23,473 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/data/ae73efecc/8745f3a0abae41e396665c8c6ba6fcc0/FLAG1231492aa [2021-11-07 01:59:23,840 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/data/ae73efecc/8745f3a0abae41e396665c8c6ba6fcc0 [2021-11-07 01:59:23,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:59:23,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:59:23,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:59:23,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:59:23,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:59:23,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:59:23" (1/1) ... [2021-11-07 01:59:23,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473aa9dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:23, skipping insertion in model container [2021-11-07 01:59:23,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:59:23" (1/1) ... [2021-11-07 01:59:23,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:59:23,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:59:24,077 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_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2021-11-07 01:59:24,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:59:24,124 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:59:24,147 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_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2021-11-07 01:59:24,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:59:24,165 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:59:24,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24 WrapperNode [2021-11-07 01:59:24,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:59:24,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:59:24,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:59:24,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:59:24,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24" (1/1) ... [2021-11-07 01:59:24,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24" (1/1) ... [2021-11-07 01:59:24,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:59:24,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:59:24,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:59:24,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:59:24,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24" (1/1) ... [2021-11-07 01:59:24,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24" (1/1) ... [2021-11-07 01:59:24,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24" (1/1) ... [2021-11-07 01:59:24,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24" (1/1) ... [2021-11-07 01:59:24,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24" (1/1) ... [2021-11-07 01:59:24,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24" (1/1) ... [2021-11-07 01:59:24,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24" (1/1) ... [2021-11-07 01:59:24,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:59:24,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:59:24,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:59:24,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:59:24,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24" (1/1) ... [2021-11-07 01:59:24,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:59:24,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:59:24,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:59:24,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:59:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:59:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:59:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:59:24,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:59:24,644 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:59:24,644 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:59:24,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:59:24 BoogieIcfgContainer [2021-11-07 01:59:24,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:59:24,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:59:24,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:59:24,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:59:24,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:59:23" (1/3) ... [2021-11-07 01:59:24,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c006b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:59:24, skipping insertion in model container [2021-11-07 01:59:24,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:24" (2/3) ... [2021-11-07 01:59:24,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c006b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:59:24, skipping insertion in model container [2021-11-07 01:59:24,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:59:24" (3/3) ... [2021-11-07 01:59:24,680 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2021-11-07 01:59:24,686 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:59:24,687 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:59:24,765 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:59:24,770 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 01:59:24,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:59:24,782 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 01:59:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 01:59:24,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:24,787 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 01:59:24,788 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:24,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2098697, now seen corresponding path program 1 times [2021-11-07 01:59:24,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:24,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808801633] [2021-11-07 01:59:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:24,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:25,094 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 01:59:25,095 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:59:25,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808801633] [2021-11-07 01:59:25,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808801633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:25,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:25,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:59:25,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155366752] [2021-11-07 01:59:25,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:25,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:59:25,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:25,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:25,129 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 01:59:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:25,182 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-07 01:59:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:59:25,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-07 01:59:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:25,193 INFO L225 Difference]: With dead ends: 15 [2021-11-07 01:59:25,193 INFO L226 Difference]: Without dead ends: 6 [2021-11-07 01:59:25,198 INFO L786 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 [2021-11-07 01:59:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-07 01:59:25,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-07 01:59:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 01:59:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-07 01:59:25,233 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-07 01:59:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:25,233 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-07 01:59:25,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 01:59:25,234 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-07 01:59:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:59:25,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:25,235 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:59:25,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:59:25,236 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash 65017289, now seen corresponding path program 1 times [2021-11-07 01:59:25,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:25,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42151897] [2021-11-07 01:59:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:25,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:25,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:59:25,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42151897] [2021-11-07 01:59:25,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42151897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:59:25,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858086517] [2021-11-07 01:59:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:25,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:59:25,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:59:25,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:59:25,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:59:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:59:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:25,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:26,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858086517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:26,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2042496158] [2021-11-07 01:59:26,287 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-07 01:59:26,287 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:59:26,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:59:26,307 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:59:26,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:59:26,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,349 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:59:26,351 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,352 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:59:26,386 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:59:26,387 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:59:26,392 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-07 01:59:26,425 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-11-07 01:59:26,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:26,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:59:26,470 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:59:26,473 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,477 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:59:26,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:59:26,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:26,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:59:26,501 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,503 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:59:26,504 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:59:26,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:59:26,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:26,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:26,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:26,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:26,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:26,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:59:26,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:59:26,625 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:59:26,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:59:26,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:26,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:26,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:26,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:26,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:59:26,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,668 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:59:26,670 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,674 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:59:26,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:59:26,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:26,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 191 [2021-11-07 01:59:26,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:59:26,741 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:221, output treesize:191 [2021-11-07 01:59:26,749 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:26,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-11-07 01:59:26,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:26,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:26,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:26,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:26,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:26,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:26,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:26,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:26,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:26,931 INFO L180 QuantifierPusher]: treesize reduction 24, result has 74.7 percent of original size [2021-11-07 01:59:26,944 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-11-07 01:59:26,953 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:59:27,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:59:27,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:59:27,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-11-07 01:59:27,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47863868] [2021-11-07 01:59:27,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:59:27,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:59:27,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:59:27,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:59:27,273 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 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 01:59:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:27,439 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-07 01:59:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:59:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 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 01:59:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:27,441 INFO L225 Difference]: With dead ends: 12 [2021-11-07 01:59:27,441 INFO L226 Difference]: Without dead ends: 8 [2021-11-07 01:59:27,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:59:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-07 01:59:27,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-07 01:59:27,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 01:59:27,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-07 01:59:27,448 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2021-11-07 01:59:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:27,450 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-07 01:59:27,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 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 01:59:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-07 01:59:27,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:59:27,451 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:27,452 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2021-11-07 01:59:27,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:27,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:59:27,674 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:27,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:27,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1944248887, now seen corresponding path program 2 times [2021-11-07 01:59:27,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:27,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660197318] [2021-11-07 01:59:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:27,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:27,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:59:27,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660197318] [2021-11-07 01:59:27,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660197318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:59:27,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979449023] [2021-11-07 01:59:27,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:59:27,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:59:27,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:59:27,821 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:59:27,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:59:27,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 01:59:27,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:59:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:59:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:28,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:29,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979449023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:29,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904061020] [2021-11-07 01:59:29,086 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-07 01:59:29,086 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:59:29,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:59:29,087 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:59:29,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:59:29,094 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,104 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:59:29,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:59:29,109 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:59:29,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:59:29,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-07 01:59:29,123 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 10=[|v_#valid_10|]} [2021-11-07 01:59:29,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:29,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:59:29,137 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,138 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:59:29,142 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:59:29,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:59:29,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:29,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:59:29,158 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:59:29,159 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,160 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:59:29,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:59:29,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:29,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:29,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:29,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:29,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:29,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:59:29,193 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,195 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:59:29,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:59:29,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:59:29,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:29,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:29,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:29,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:59:29,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:59:29,213 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:59:29,215 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:59:29,216 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:59:29,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:29,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,228 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 191 [2021-11-07 01:59:29,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:59:29,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:221, output treesize:191 [2021-11-07 01:59:29,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:59:29,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 422 [2021-11-07 01:59:29,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:29,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:29,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:29,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:29,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:29,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:29,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:29,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:29,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:59:29,313 INFO L180 QuantifierPusher]: treesize reduction 24, result has 74.7 percent of original size [2021-11-07 01:59:29,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-11-07 01:59:29,324 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:59:29,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:59:29,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:59:29,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-11-07 01:59:29,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879938767] [2021-11-07 01:59:29,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:59:29,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:59:29,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:59:29,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:59:29,607 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 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 01:59:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:29,966 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-07 01:59:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:59:29,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 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 7 [2021-11-07 01:59:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:29,967 INFO L225 Difference]: With dead ends: 16 [2021-11-07 01:59:29,967 INFO L226 Difference]: Without dead ends: 11 [2021-11-07 01:59:29,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:59:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-07 01:59:29,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-07 01:59:29,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 01:59:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-07 01:59:29,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-11-07 01:59:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:29,972 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-07 01:59:29,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 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 01:59:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-07 01:59:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:59:29,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:29,973 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2021-11-07 01:59:30,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:30,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 01:59:30,173 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash 768339465, now seen corresponding path program 3 times [2021-11-07 01:59:30,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:30,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857410017] [2021-11-07 01:59:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:30,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:59:30,217 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:59:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:59:30,264 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 01:59:30,265 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:59:30,266 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:59:30,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 01:59:30,271 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-07 01:59:30,274 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:59:30,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:59:30 BoogieIcfgContainer [2021-11-07 01:59:30,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:59:30,292 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:59:30,292 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:59:30,292 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:59:30,293 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:59:24" (3/4) ... [2021-11-07 01:59:30,294 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 01:59:30,329 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05b0a854-3a17-447d-8fe0-b1d6f68f96c3/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:59:30,332 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:59:30,333 INFO L168 Benchmark]: Toolchain (without parser) took 6488.52 ms. Allocated memory was 83.9 MB in the beginning and 138.4 MB in the end (delta: 54.5 MB). Free memory was 53.8 MB in the beginning and 79.1 MB in the end (delta: -25.3 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:59:30,334 INFO L168 Benchmark]: CDTParser took 1.21 ms. Allocated memory is still 83.9 MB. Free memory was 43.1 MB in the beginning and 43.1 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:59:30,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.93 ms. Allocated memory is still 83.9 MB. Free memory was 53.6 MB in the beginning and 61.6 MB in the end (delta: -8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:59:30,335 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.66 ms. Allocated memory is still 83.9 MB. Free memory was 61.6 MB in the beginning and 60.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:59:30,335 INFO L168 Benchmark]: Boogie Preprocessor took 36.49 ms. Allocated memory is still 83.9 MB. Free memory was 60.3 MB in the beginning and 59.3 MB in the end (delta: 981.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:59:30,336 INFO L168 Benchmark]: RCFGBuilder took 407.21 ms. Allocated memory is still 83.9 MB. Free memory was 59.0 MB in the beginning and 48.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:59:30,336 INFO L168 Benchmark]: TraceAbstraction took 5633.68 ms. Allocated memory was 83.9 MB in the beginning and 138.4 MB in the end (delta: 54.5 MB). Free memory was 48.1 MB in the beginning and 81.2 MB in the end (delta: -33.1 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:59:30,339 INFO L168 Benchmark]: Witness Printer took 39.72 ms. Allocated memory is still 138.4 MB. Free memory was 81.2 MB in the beginning and 79.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:59:30,341 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.21 ms. Allocated memory is still 83.9 MB. Free memory was 43.1 MB in the beginning and 43.1 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 320.93 ms. Allocated memory is still 83.9 MB. Free memory was 53.6 MB in the beginning and 61.6 MB in the end (delta: -8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.66 ms. Allocated memory is still 83.9 MB. Free memory was 61.6 MB in the beginning and 60.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.49 ms. Allocated memory is still 83.9 MB. Free memory was 60.3 MB in the beginning and 59.3 MB in the end (delta: 981.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 407.21 ms. Allocated memory is still 83.9 MB. Free memory was 59.0 MB in the beginning and 48.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5633.68 ms. Allocated memory was 83.9 MB in the beginning and 138.4 MB in the end (delta: 54.5 MB). Free memory was 48.1 MB in the beginning and 81.2 MB in the end (delta: -33.1 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. * Witness Printer took 39.72 ms. Allocated memory is still 138.4 MB. Free memory was 81.2 MB in the beginning and 79.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i