./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS --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 7f61497696f0e412e267c342267f07f29bf3ce290f707b3aa1a4f0ac00ff0274 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:32:57,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:32:57,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:32:57,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:32:57,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:32:57,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:32:57,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:32:57,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:32:57,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:32:57,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:32:57,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:32:57,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:32:57,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:32:57,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:32:57,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:32:57,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:32:57,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:32:57,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:32:57,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:32:57,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:32:57,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:32:57,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:32:57,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:32:57,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:32:57,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:32:57,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:32:57,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:32:57,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:32:57,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:32:57,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:32:57,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:32:57,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:32:57,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:32:57,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:32:57,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:32:57,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:32:57,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:32:57,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:32:57,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:32:57,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:32:57,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:32:57,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:32:57,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:32:57,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:32:57,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:32:57,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:32:57,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:32:57,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:32:57,462 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:32:57,462 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:32:57,462 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:32:57,463 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:32:57,464 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:32:57,464 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:32:57,464 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:32:57,465 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:32:57,465 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:32:57,465 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:32:57,465 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:32:57,466 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:32:57,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:32:57,467 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:32:57,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:32:57,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:32:57,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:32:57,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:32:57,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:32:57,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:32:57,470 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:32:57,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:32:57,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:32:57,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:32:57,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:32:57,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:32:57,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:32:57,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:32:57,472 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:32:57,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:32:57,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:32:57,473 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:32:57,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:32:57,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:32:57,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:32:57,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f61497696f0e412e267c342267f07f29bf3ce290f707b3aa1a4f0ac00ff0274 [2022-11-19 08:32:57,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:32:57,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:32:57,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:32:57,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:32:57,824 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:32:57,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-11-19 08:32:57,899 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/data/f0cbb54a8/55549bd92f2d454a81d29c988a1155db/FLAG65fced02e [2022-11-19 08:32:58,485 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:32:58,488 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-11-19 08:32:58,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/data/f0cbb54a8/55549bd92f2d454a81d29c988a1155db/FLAG65fced02e [2022-11-19 08:32:58,813 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/data/f0cbb54a8/55549bd92f2d454a81d29c988a1155db [2022-11-19 08:32:58,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:32:58,817 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:32:58,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:32:58,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:32:58,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:32:58,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:32:58" (1/1) ... [2022-11-19 08:32:58,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63dbc6ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:58, skipping insertion in model container [2022-11-19 08:32:58,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:32:58" (1/1) ... [2022-11-19 08:32:58,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:32:58,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:32:59,047 WARN L234 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_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2022-11-19 08:32:59,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:32:59,076 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:32:59,087 WARN L234 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_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2022-11-19 08:32:59,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:32:59,111 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:32:59,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59 WrapperNode [2022-11-19 08:32:59,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:32:59,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:32:59,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:32:59,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:32:59,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (1/1) ... [2022-11-19 08:32:59,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (1/1) ... [2022-11-19 08:32:59,150 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-11-19 08:32:59,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:32:59,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:32:59,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:32:59,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:32:59,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (1/1) ... [2022-11-19 08:32:59,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (1/1) ... [2022-11-19 08:32:59,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (1/1) ... [2022-11-19 08:32:59,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (1/1) ... [2022-11-19 08:32:59,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (1/1) ... [2022-11-19 08:32:59,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (1/1) ... [2022-11-19 08:32:59,171 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (1/1) ... [2022-11-19 08:32:59,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (1/1) ... [2022-11-19 08:32:59,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:32:59,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:32:59,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:32:59,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:32:59,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (1/1) ... [2022-11-19 08:32:59,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:32:59,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:59,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:32:59,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:32:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:32:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:32:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:32:59,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:32:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 08:32:59,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 08:32:59,330 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:32:59,332 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:32:59,494 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:32:59,535 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:32:59,535 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:32:59,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:32:59 BoogieIcfgContainer [2022-11-19 08:32:59,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:32:59,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:32:59,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:32:59,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:32:59,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:32:58" (1/3) ... [2022-11-19 08:32:59,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddc38ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:32:59, skipping insertion in model container [2022-11-19 08:32:59,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:59" (2/3) ... [2022-11-19 08:32:59,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddc38ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:32:59, skipping insertion in model container [2022-11-19 08:32:59,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:32:59" (3/3) ... [2022-11-19 08:32:59,559 INFO L112 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2022-11-19 08:32:59,582 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:32:59,583 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:32:59,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:32:59,692 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4383de6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:32:59,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:32:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:32:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:32:59,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:59,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:59,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:32:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:59,714 INFO L85 PathProgramCache]: Analyzing trace with hash -26250642, now seen corresponding path program 1 times [2022-11-19 08:32:59,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:59,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181835632] [2022-11-19 08:32:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:59,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:59,868 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:32:59,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254641773] [2022-11-19 08:32:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:59,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:59,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:59,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:59,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:33:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:00,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:33:00,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:00,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:00,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:00,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181835632] [2022-11-19 08:33:00,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:33:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254641773] [2022-11-19 08:33:00,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254641773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:00,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:00,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:33:00,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025954966] [2022-11-19 08:33:00,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:00,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:33:00,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:00,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:33:00,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:00,350 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:00,488 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2022-11-19 08:33:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:33:00,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:33:00,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:00,499 INFO L225 Difference]: With dead ends: 42 [2022-11-19 08:33:00,499 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 08:33:00,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:33:00,508 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:00,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:33:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 08:33:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-19 08:33:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:33:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-19 08:33:00,561 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2022-11-19 08:33:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:00,562 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-19 08:33:00,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-19 08:33:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:33:00,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:00,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:00,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:00,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 08:33:00,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:00,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1971909778, now seen corresponding path program 1 times [2022-11-19 08:33:00,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:00,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679326076] [2022-11-19 08:33:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:00,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:00,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:33:00,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154696846] [2022-11-19 08:33:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:00,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:00,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:00,831 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:00,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:33:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:00,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:33:00,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:01,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:02,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:02,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679326076] [2022-11-19 08:33:02,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:33:02,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154696846] [2022-11-19 08:33:02,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154696846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:02,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1551780791] [2022-11-19 08:33:02,201 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 08:33:02,202 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:33:02,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:33:02,218 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:33:02,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:33:02,914 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2022-11-19 08:33:02,963 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:33:05,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '230#(and (< ~counter~0 6) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:33:05,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:33:05,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:33:05,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-19 08:33:05,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381339617] [2022-11-19 08:33:05,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:05,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:33:05,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:05,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:33:05,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:33:05,500 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:33:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:06,289 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-11-19 08:33:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:33:06,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-19 08:33:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:06,292 INFO L225 Difference]: With dead ends: 35 [2022-11-19 08:33:06,292 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 08:33:06,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:33:06,294 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:06,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 34 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:33:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 08:33:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-11-19 08:33:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:33:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-11-19 08:33:06,313 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2022-11-19 08:33:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:06,314 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-11-19 08:33:06,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:33:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-11-19 08:33:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:33:06,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:06,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:06,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:06,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:06,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:06,523 INFO L85 PathProgramCache]: Analyzing trace with hash 927087193, now seen corresponding path program 1 times [2022-11-19 08:33:06,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:06,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792326272] [2022-11-19 08:33:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:06,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:06,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:33:06,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993654314] [2022-11-19 08:33:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:06,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:06,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:06,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:06,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:33:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:06,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:33:06,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:06,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:06,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:06,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792326272] [2022-11-19 08:33:06,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:33:06,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993654314] [2022-11-19 08:33:06,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993654314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:06,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [645177808] [2022-11-19 08:33:06,705 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 08:33:06,710 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:33:06,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:33:06,711 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:33:06,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:33:07,371 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2022-11-19 08:33:07,533 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:33:13,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '423#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 08:33:13,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:33:13,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:33:13,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-19 08:33:13,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665267664] [2022-11-19 08:33:13,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:13,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:33:13,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:13,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:33:13,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:33:13,528 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:33:13,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:13,677 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-11-19 08:33:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:33:13,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-19 08:33:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:13,679 INFO L225 Difference]: With dead ends: 59 [2022-11-19 08:33:13,679 INFO L226 Difference]: Without dead ends: 53 [2022-11-19 08:33:13,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:33:13,682 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:13,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 68 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:33:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-19 08:33:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2022-11-19 08:33:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:33:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-11-19 08:33:13,700 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 16 [2022-11-19 08:33:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:13,700 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-11-19 08:33:13,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:33:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-11-19 08:33:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:33:13,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:13,702 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:13,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:13,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:13,915 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1587911935, now seen corresponding path program 1 times [2022-11-19 08:33:13,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:13,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570217133] [2022-11-19 08:33:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:13,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:13,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:33:13,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613215924] [2022-11-19 08:33:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:13,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:13,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:13,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:13,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:33:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:33:13,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:33:14,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:33:15,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:15,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570217133] [2022-11-19 08:33:15,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:33:15,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613215924] [2022-11-19 08:33:15,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613215924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:15,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672144014] [2022-11-19 08:33:15,307 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 08:33:15,308 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:33:15,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:33:15,308 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:33:15,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:33:15,851 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 86 for LOIs [2022-11-19 08:33:16,030 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:33:27,775 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '719#(and (< ~counter~0 6) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:33:27,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:33:27,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:33:27,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-11-19 08:33:27,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205943857] [2022-11-19 08:33:27,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:27,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 08:33:27,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:27,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 08:33:27,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=651, Unknown=1, NotChecked=0, Total=756 [2022-11-19 08:33:27,779 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:33:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:28,716 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2022-11-19 08:33:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:33:28,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2022-11-19 08:33:28,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:28,719 INFO L225 Difference]: With dead ends: 49 [2022-11-19 08:33:28,719 INFO L226 Difference]: Without dead ends: 41 [2022-11-19 08:33:28,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=171, Invalid=1018, Unknown=1, NotChecked=0, Total=1190 [2022-11-19 08:33:28,722 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:28,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 42 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:33:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-19 08:33:28,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-19 08:33:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:33:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-11-19 08:33:28,742 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 22 [2022-11-19 08:33:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:28,742 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-11-19 08:33:28,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:33:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-11-19 08:33:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 08:33:28,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:28,744 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:28,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:28,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:28,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1355163283, now seen corresponding path program 2 times [2022-11-19 08:33:28,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:28,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546291763] [2022-11-19 08:33:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:28,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:28,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:33:28,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390252091] [2022-11-19 08:33:28,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:33:28,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:28,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:28,965 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:28,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:33:29,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 08:33:29,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:33:29,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:33:29,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:29,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:33:29,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:29,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546291763] [2022-11-19 08:33:29,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:33:29,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390252091] [2022-11-19 08:33:29,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390252091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:29,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [441471367] [2022-11-19 08:33:29,378 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 08:33:29,379 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:33:29,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:33:29,379 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:33:29,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:33:29,885 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2022-11-19 08:33:30,030 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:33:32,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1108#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 08:33:32,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:33:32,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:33:32,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2022-11-19 08:33:32,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222900569] [2022-11-19 08:33:32,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:32,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:33:32,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:33:32,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:33:32,230 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:33:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:32,425 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-11-19 08:33:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:33:32,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 40 [2022-11-19 08:33:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:32,427 INFO L225 Difference]: With dead ends: 55 [2022-11-19 08:33:32,427 INFO L226 Difference]: Without dead ends: 49 [2022-11-19 08:33:32,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:33:32,429 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:32,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:33:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-19 08:33:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-19 08:33:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 08:33:32,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-11-19 08:33:32,450 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 40 [2022-11-19 08:33:32,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:32,450 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-11-19 08:33:32,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:33:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-11-19 08:33:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 08:33:32,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:32,452 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:32,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 08:33:32,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:32,659 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash -112186423, now seen corresponding path program 3 times [2022-11-19 08:33:32,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:32,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171603447] [2022-11-19 08:33:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:32,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:32,673 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:33:32,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665779870] [2022-11-19 08:33:32,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:33:32,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:32,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:32,676 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:32,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:33:32,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:33:32,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-19 08:33:32,882 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 08:33:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:33:32,958 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 08:33:32,958 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 08:33:32,960 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 08:33:32,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:33,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 08:33:33,172 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-11-19 08:33:33,176 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:33:33,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:33:33 BoogieIcfgContainer [2022-11-19 08:33:33,218 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:33:33,219 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:33:33,219 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:33:33,219 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:33:33,220 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:32:59" (3/4) ... [2022-11-19 08:33:33,222 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 08:33:33,295 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:33:33,298 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:33:33,299 INFO L158 Benchmark]: Toolchain (without parser) took 34481.70ms. Allocated memory was 121.6MB in the beginning and 184.5MB in the end (delta: 62.9MB). Free memory was 79.2MB in the beginning and 116.9MB in the end (delta: -37.6MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. [2022-11-19 08:33:33,300 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 121.6MB. Free memory is still 95.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:33:33,300 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.58ms. Allocated memory is still 121.6MB. Free memory was 79.0MB in the beginning and 95.6MB in the end (delta: -16.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:33:33,301 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.80ms. Allocated memory is still 121.6MB. Free memory was 95.6MB in the beginning and 94.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:33:33,303 INFO L158 Benchmark]: Boogie Preprocessor took 22.66ms. Allocated memory is still 121.6MB. Free memory was 94.0MB in the beginning and 93.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:33:33,303 INFO L158 Benchmark]: RCFGBuilder took 364.34ms. Allocated memory is still 121.6MB. Free memory was 92.5MB in the beginning and 80.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 08:33:33,304 INFO L158 Benchmark]: TraceAbstraction took 33677.24ms. Allocated memory was 121.6MB in the beginning and 184.5MB in the end (delta: 62.9MB). Free memory was 79.4MB in the beginning and 120.0MB in the end (delta: -40.6MB). Peak memory consumption was 24.8MB. Max. memory is 16.1GB. [2022-11-19 08:33:33,304 INFO L158 Benchmark]: Witness Printer took 79.70ms. Allocated memory is still 184.5MB. Free memory was 120.0MB in the beginning and 116.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:33:33,306 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 121.6MB. Free memory is still 95.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.58ms. Allocated memory is still 121.6MB. Free memory was 79.0MB in the beginning and 95.6MB in the end (delta: -16.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.80ms. Allocated memory is still 121.6MB. Free memory was 95.6MB in the beginning and 94.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.66ms. Allocated memory is still 121.6MB. Free memory was 94.0MB in the beginning and 93.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 364.34ms. Allocated memory is still 121.6MB. Free memory was 92.5MB in the beginning and 80.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 33677.24ms. Allocated memory was 121.6MB in the beginning and 184.5MB in the end (delta: 62.9MB). Free memory was 79.4MB in the beginning and 120.0MB in the end (delta: -40.6MB). Peak memory consumption was 24.8MB. Max. memory is 16.1GB. * Witness Printer took 79.70ms. Allocated memory is still 184.5MB. Free memory was 120.0MB in the beginning and 116.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0, v=2, x=0, X=6, Y=4, y=0] [L31] EXPR counter++ VAL [counter=1, counter++=0, v=2, X=6, x=0, y=0, Y=4] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [counter=1, v=2, X=6, x=0, x=0, x=0, Y=4, y=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [counter=1, v=2, x=0, x=0, x=0, X=6, y=0, Y=4] [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ VAL [counter=1, v=-2, x=1, x=0, x=0, X=6, y=1, Y=4, y++=34] [L31] EXPR counter++ VAL [counter=2, counter++=1, v=-2, x=0, X=6, x=0, x=1, y=1, Y=4, y++=34] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [counter=2, v=-2, x=1, x=6, x=4, X=6, y=1, Y=4, y++=34] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=2] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [counter=2, v=-2, X=6, x=1, x=6, x=4, Y=4, y=1, y++=34] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=2, v=6, X=6, x=6, x=2, x=4, Y=4, y=1, y++=34] [L31] EXPR counter++ VAL [counter=3, counter++=2, v=6, x=2, X=6, x=4, x=6, y=1, Y=4, y++=34] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [counter=3, v=6, X=6, x=2, x=8, x=6, y=1, Y=4, y++=34] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=3] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [counter=3, v=6, x=8, x=2, X=6, x=6, Y=4, y=1, y++=34] [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ VAL [counter=3, v=2, X=6, x=3, x=8, x=6, y=2, Y=4, y++=0] [L31] EXPR counter++ VAL [counter=4, counter++=3, v=2, X=6, x=3, x=8, x=6, y=2, Y=4, y++=0] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [counter=4, v=2, x=12, x=3, X=6, x=12, y=2, Y=4, y++=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=4] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [counter=4, v=2, x=12, x=12, X=6, x=3, y=2, Y=4, y++=0] [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ VAL [counter=4, v=-2, x=4, x=12, X=6, x=12, y=3, Y=4, y++=59] [L31] EXPR counter++ VAL [counter=5, counter++=4, v=-2, X=6, x=4, x=12, x=12, y=3, Y=4, y++=59] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [counter=5, v=-2, x=18, X=6, x=4, x=16, y=3, Y=4, y++=59] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=5] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [counter=5, v=-2, x=16, x=4, X=6, x=18, y=3, Y=4, y++=59] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=5, v=6, x=16, x=18, X=6, x=5, y=3, Y=4, y++=59] [L31] EXPR counter++ VAL [counter=6, counter++=5, v=6, X=6, x=16, x=5, x=18, Y=4, y=3, y++=59] [L31] COND FALSE !(counter++<5) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x VAL [counter=6, v=6, x=20, x=5, x=15, X=6, Y=4, y=3, y++=59] [L49] CALL __VERIFIER_assert(2*yx - 2*xy - X + (long long) 2*Y - v + 2*y == 0) VAL [\old(cond)=0, counter=6] [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L16] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.5s, OverallIterations: 6, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 133 mSDsluCounter, 236 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 183 mSDsCounter, 64 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 359 IncrementalHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 64 mSolverCounterUnsat, 53 mSDtfsCounter, 359 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 298 GetRequests, 188 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 24.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=5, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 20 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 1301 SizeOfPredicates, 23 NumberOfNonLiveVariables, 443 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 66/170 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 08:33:33,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef420d6-b6d4-4346-8a27-2ca9cb15bf3e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE