./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_02.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_02.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba --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 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c --- 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-b5237d8 [2022-11-22 02:41:54,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:41:54,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:41:54,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:41:54,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:41:54,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:41:54,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:41:54,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:41:54,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:41:54,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:41:54,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:41:54,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:41:54,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:41:54,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:41:54,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:41:54,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:41:54,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:41:54,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:41:54,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:41:54,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:41:54,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:41:54,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:41:54,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:41:54,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:41:54,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:41:54,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:41:54,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:41:54,291 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:41:54,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:41:54,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:41:54,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:41:54,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:41:54,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:41:54,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:41:54,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:41:54,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:41:54,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:41:54,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:41:54,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:41:54,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:41:54,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:41:54,300 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:41:54,322 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:41:54,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:41:54,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:41:54,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:41:54,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:41:54,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:41:54,325 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:41:54,325 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:41:54,325 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:41:54,326 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:41:54,326 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:41:54,326 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:41:54,326 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:41:54,327 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:41:54,327 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:41:54,327 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:41:54,328 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:41:54,328 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:41:54,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:41:54,329 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:41:54,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:41:54,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:41:54,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:41:54,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:41:54,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:41:54,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:41:54,331 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:41:54,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:41:54,331 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:41:54,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:41:54,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:41:54,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:41:54,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:41:54,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:41:54,333 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:41:54,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:41:54,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:41:54,334 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:41:54,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:41:54,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:41:54,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:41:54,335 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_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c [2022-11-22 02:41:54,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:41:54,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:41:54,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:41:54,672 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:41:54,674 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:41:54,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-examples/standard_two_index_02.i [2022-11-22 02:41:57,797 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:41:57,959 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:41:57,959 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/sv-benchmarks/c/array-examples/standard_two_index_02.i [2022-11-22 02:41:57,965 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/data/854fb0e7e/57899d4e42fb4c218f9bec8f15a7d30d/FLAG239ee7d1b [2022-11-22 02:41:57,988 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/data/854fb0e7e/57899d4e42fb4c218f9bec8f15a7d30d [2022-11-22 02:41:57,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:41:57,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:41:57,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:41:57,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:41:58,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:41:58,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:41:57" (1/1) ... [2022-11-22 02:41:58,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6b9347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58, skipping insertion in model container [2022-11-22 02:41:58,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:41:57" (1/1) ... [2022-11-22 02:41:58,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:41:58,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:41:58,190 WARN L237 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_192e15ff-07a0-465e-bd6d-719e186e6973/sv-benchmarks/c/array-examples/standard_two_index_02.i[814,827] [2022-11-22 02:41:58,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:41:58,213 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:41:58,223 WARN L237 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_192e15ff-07a0-465e-bd6d-719e186e6973/sv-benchmarks/c/array-examples/standard_two_index_02.i[814,827] [2022-11-22 02:41:58,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:41:58,245 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:41:58,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58 WrapperNode [2022-11-22 02:41:58,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:41:58,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:41:58,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:41:58,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:41:58,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (1/1) ... [2022-11-22 02:41:58,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (1/1) ... [2022-11-22 02:41:58,282 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-22 02:41:58,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:41:58,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:41:58,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:41:58,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:41:58,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (1/1) ... [2022-11-22 02:41:58,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (1/1) ... [2022-11-22 02:41:58,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (1/1) ... [2022-11-22 02:41:58,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (1/1) ... [2022-11-22 02:41:58,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (1/1) ... [2022-11-22 02:41:58,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (1/1) ... [2022-11-22 02:41:58,305 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (1/1) ... [2022-11-22 02:41:58,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (1/1) ... [2022-11-22 02:41:58,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:41:58,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:41:58,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:41:58,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:41:58,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (1/1) ... [2022-11-22 02:41:58,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:41:58,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:41:58,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:41:58,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:41:58,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:41:58,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:41:58,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:41:58,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:41:58,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:41:58,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:41:58,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:41:58,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:41:58,462 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:41:58,473 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:41:58,679 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:41:58,722 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:41:58,722 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 02:41:58,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:41:58 BoogieIcfgContainer [2022-11-22 02:41:58,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:41:58,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:41:58,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:41:58,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:41:58,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:41:57" (1/3) ... [2022-11-22 02:41:58,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31312d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:41:58, skipping insertion in model container [2022-11-22 02:41:58,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:58" (2/3) ... [2022-11-22 02:41:58,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31312d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:41:58, skipping insertion in model container [2022-11-22 02:41:58,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:41:58" (3/3) ... [2022-11-22 02:41:58,736 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_02.i [2022-11-22 02:41:58,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:41:58,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:41:58,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:41:58,828 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;@46f335ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:41:58,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:41:58,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:41:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:41:58,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:41:58,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:41:58,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:41:58,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:41:58,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1745982706, now seen corresponding path program 1 times [2022-11-22 02:41:58,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:41:58,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752160036] [2022-11-22 02:41:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:41:58,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:41:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:41:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:41:59,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:41:59,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752160036] [2022-11-22 02:41:59,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752160036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:41:59,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:41:59,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:41:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361841375] [2022-11-22 02:41:59,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:41:59,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:41:59,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:41:59,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:41:59,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:41:59,229 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:41:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:41:59,268 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-11-22 02:41:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:41:59,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 02:41:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:41:59,280 INFO L225 Difference]: With dead ends: 17 [2022-11-22 02:41:59,280 INFO L226 Difference]: Without dead ends: 9 [2022-11-22 02:41:59,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:41:59,287 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:41:59,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:41:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-22 02:41:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-22 02:41:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:41:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-22 02:41:59,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-11-22 02:41:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:41:59,329 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-22 02:41:59,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:41:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-22 02:41:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:41:59,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:41:59,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:41:59,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:41:59,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:41:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:41:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash 276578033, now seen corresponding path program 1 times [2022-11-22 02:41:59,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:41:59,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896047948] [2022-11-22 02:41:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:41:59,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:41:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:41:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:41:59,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:41:59,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896047948] [2022-11-22 02:41:59,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896047948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:41:59,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32235622] [2022-11-22 02:41:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:41:59,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:41:59,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:41:59,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:41:59,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:41:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:41:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:41:59,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:41:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:41:59,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:41:59,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32235622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:41:59,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:41:59,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-22 02:41:59,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569088367] [2022-11-22 02:41:59,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:41:59,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:41:59,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:41:59,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:41:59,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:41:59,589 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:41:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:41:59,616 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-22 02:41:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:41:59,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 02:41:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:41:59,617 INFO L225 Difference]: With dead ends: 20 [2022-11-22 02:41:59,617 INFO L226 Difference]: Without dead ends: 15 [2022-11-22 02:41:59,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:41:59,619 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:41:59,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:41:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-22 02:41:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-11-22 02:41:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:41:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-22 02:41:59,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-22 02:41:59,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:41:59,650 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-22 02:41:59,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:41:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-22 02:41:59,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:41:59,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:41:59,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:41:59,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:41:59,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-22 02:41:59,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:41:59,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:41:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash -51261225, now seen corresponding path program 1 times [2022-11-22 02:41:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:41:59,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511387750] [2022-11-22 02:41:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:41:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:41:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:41:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:41:59,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:41:59,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511387750] [2022-11-22 02:41:59,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511387750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:41:59,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509422094] [2022-11-22 02:41:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:41:59,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:41:59,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:41:59,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:41:59,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:42:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:42:00,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:42:00,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:42:00,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509422094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:00,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1001585415] [2022-11-22 02:42:00,144 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:42:00,144 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:00,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:00,155 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:00,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:00,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,299 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-22 02:42:00,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-22 02:42:00,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,380 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-22 02:42:00,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-22 02:42:00,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 02:42:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:42:00,649 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 02:42:00,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-22 02:42:00,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:42:00,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-22 02:42:00,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,993 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-22 02:42:00,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-22 02:42:01,184 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 02:42:01,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:42:01,204 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:01,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:42:01,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:01,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:01,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-22 02:42:01,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564665939] [2022-11-22 02:42:01,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:01,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:42:01,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:01,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:42:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:42:01,391 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:01,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:01,439 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-22 02:42:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:42:01,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 02:42:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:01,441 INFO L225 Difference]: With dead ends: 31 [2022-11-22 02:42:01,442 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 02:42:01,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:42:01,454 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:01,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:42:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 02:42:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-11-22 02:42:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-22 02:42:01,463 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-22 02:42:01,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:01,463 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-22 02:42:01,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:01,464 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-22 02:42:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:42:01,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:01,465 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:01,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:01,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:01,671 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:01,672 INFO L85 PathProgramCache]: Analyzing trace with hash 490227022, now seen corresponding path program 2 times [2022-11-22 02:42:01,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:01,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188881412] [2022-11-22 02:42:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:01,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:42:01,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:01,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188881412] [2022-11-22 02:42:01,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188881412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:01,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181821559] [2022-11-22 02:42:01,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:42:01,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:01,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:01,854 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:01,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:42:01,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:42:01,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:42:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:42:01,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:42:01,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:42:01,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181821559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:01,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060116007] [2022-11-22 02:42:01,976 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:42:01,976 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:01,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:01,977 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:01,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:01,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:02,035 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-22 02:42:02,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-22 02:42:02,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:02,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:02,104 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-22 02:42:02,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-22 02:42:02,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:02,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 02:42:02,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:02,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:42:02,282 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 02:42:02,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-22 02:42:02,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:42:02,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:02,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-22 02:42:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:02,550 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-11-22 02:42:02,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2022-11-22 02:42:02,641 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 02:42:02,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:42:02,659 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:02,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:42:02,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:02,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:02,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-22 02:42:02,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278091248] [2022-11-22 02:42:02,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:02,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:42:02,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:42:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:42:02,816 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:02,902 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-11-22 02:42:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:42:02,903 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 02:42:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:02,903 INFO L225 Difference]: With dead ends: 54 [2022-11-22 02:42:02,904 INFO L226 Difference]: Without dead ends: 46 [2022-11-22 02:42:02,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:42:02,905 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:02,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 18 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:42:02,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-22 02:42:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2022-11-22 02:42:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-22 02:42:02,912 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-11-22 02:42:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:02,912 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-22 02:42:02,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-22 02:42:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 02:42:02,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:02,913 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:02,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:03,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:03,120 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:03,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1077845166, now seen corresponding path program 3 times [2022-11-22 02:42:03,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:03,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390494888] [2022-11-22 02:42:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:03,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 02:42:03,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:03,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390494888] [2022-11-22 02:42:03,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390494888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:03,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602396596] [2022-11-22 02:42:03,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:42:03,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:03,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:03,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:42:03,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:42:03,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:42:03,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:42:03,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 02:42:03,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 02:42:03,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602396596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:03,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838028004] [2022-11-22 02:42:03,617 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:42:03,617 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:03,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:03,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:03,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:03,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:03,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:03,679 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-22 02:42:03,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-22 02:42:03,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:03,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:03,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-22 02:42:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:03,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-22 02:42:03,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:03,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:03,813 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 02:42:03,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-22 02:42:03,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:42:03,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:03,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:42:03,984 INFO L321 Elim1Store]: treesize reduction 118, result has 26.3 percent of original size [2022-11-22 02:42:03,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 108 [2022-11-22 02:42:04,046 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 02:42:04,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:42:04,060 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:04,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '554#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:42:04,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:04,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:04,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-11-22 02:42:04,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930999455] [2022-11-22 02:42:04,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:04,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 02:42:04,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:04,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 02:42:04,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:42:04,267 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:04,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:04,436 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-11-22 02:42:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 02:42:04,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-22 02:42:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:04,438 INFO L225 Difference]: With dead ends: 100 [2022-11-22 02:42:04,438 INFO L226 Difference]: Without dead ends: 88 [2022-11-22 02:42:04,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:42:04,439 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 104 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:04,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 48 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:42:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-22 02:42:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 37. [2022-11-22 02:42:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:04,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-11-22 02:42:04,447 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2022-11-22 02:42:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:04,447 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-11-22 02:42:04,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-11-22 02:42:04,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 02:42:04,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:04,448 INFO L195 NwaCegarLoop]: trace histogram [18, 11, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:04,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:04,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:04,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:04,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:04,655 INFO L85 PathProgramCache]: Analyzing trace with hash 878194042, now seen corresponding path program 4 times [2022-11-22 02:42:04,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:04,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631858250] [2022-11-22 02:42:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:04,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-22 02:42:05,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:05,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631858250] [2022-11-22 02:42:05,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631858250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:05,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067880530] [2022-11-22 02:42:05,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:42:05,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:05,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:05,061 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:05,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:42:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:05,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:42:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-22 02:42:05,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-22 02:42:05,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067880530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:05,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777197883] [2022-11-22 02:42:05,811 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:42:05,811 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:05,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:05,812 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:05,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:05,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:05,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:05,861 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-22 02:42:05,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-22 02:42:05,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:05,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:05,920 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-22 02:42:05,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-22 02:42:05,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:05,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-22 02:42:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:06,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:06,043 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 02:42:06,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-22 02:42:06,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:42:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:06,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-22 02:42:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:06,227 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-11-22 02:42:06,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2022-11-22 02:42:06,295 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 02:42:06,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:42:06,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:06,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1027#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:42:06,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:06,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:06,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 44 [2022-11-22 02:42:06,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948637829] [2022-11-22 02:42:06,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:06,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-22 02:42:06,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:06,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-22 02:42:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 02:42:06,588 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:07,091 INFO L93 Difference]: Finished difference Result 194 states and 231 transitions. [2022-11-22 02:42:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-22 02:42:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-22 02:42:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:07,093 INFO L225 Difference]: With dead ends: 194 [2022-11-22 02:42:07,094 INFO L226 Difference]: Without dead ends: 177 [2022-11-22 02:42:07,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 02:42:07,096 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 292 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:07,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 99 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:42:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-22 02:42:07,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 71. [2022-11-22 02:42:07,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-11-22 02:42:07,107 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 35 [2022-11-22 02:42:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:07,108 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-11-22 02:42:07,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:07,108 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-11-22 02:42:07,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-22 02:42:07,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:07,110 INFO L195 NwaCegarLoop]: trace histogram [41, 22, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:07,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:07,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 02:42:07,316 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash -938265679, now seen corresponding path program 5 times [2022-11-22 02:42:07,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:07,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630911579] [2022-11-22 02:42:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:07,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-11-22 02:42:08,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:08,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630911579] [2022-11-22 02:42:08,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630911579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:08,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123749080] [2022-11-22 02:42:08,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:42:08,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:08,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:08,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:08,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:42:30,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-22 02:42:30,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:42:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:42:30,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-11-22 02:42:30,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-11-22 02:42:31,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123749080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:31,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [171557047] [2022-11-22 02:42:31,737 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:42:31,737 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:31,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:31,738 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:31,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:31,802 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-22 02:42:31,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-22 02:42:31,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:31,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-22 02:42:31,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:31,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 02:42:31,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:31,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:42:31,979 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 02:42:31,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-22 02:42:32,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:42:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-22 02:42:32,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,209 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-22 02:42:32,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-22 02:42:32,290 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 02:42:32,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:42:32,305 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:32,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1921#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:42:32,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:32,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:32,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-22 02:42:32,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528690614] [2022-11-22 02:42:32,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:32,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-22 02:42:32,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-22 02:42:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=1526, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 02:42:32,485 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:33,155 INFO L93 Difference]: Finished difference Result 354 states and 386 transitions. [2022-11-22 02:42:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-22 02:42:33,156 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-22 02:42:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:33,157 INFO L225 Difference]: With dead ends: 354 [2022-11-22 02:42:33,158 INFO L226 Difference]: Without dead ends: 326 [2022-11-22 02:42:33,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1336, Invalid=1526, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 02:42:33,160 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 600 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:33,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 138 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:42:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-22 02:42:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2022-11-22 02:42:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-11-22 02:42:33,175 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 69 [2022-11-22 02:42:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:33,175 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-11-22 02:42:33,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-11-22 02:42:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-22 02:42:33,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:33,178 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:33,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:33,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:42:33,383 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:33,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 788832814, now seen corresponding path program 6 times [2022-11-22 02:42:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:33,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664114239] [2022-11-22 02:42:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:33,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-22 02:42:36,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:36,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664114239] [2022-11-22 02:42:36,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664114239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:36,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328087343] [2022-11-22 02:42:36,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:42:36,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:36,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:36,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:36,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:42:36,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:42:36,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:42:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-22 02:42:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-22 02:42:36,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-22 02:42:39,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328087343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:39,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2057744967] [2022-11-22 02:42:39,961 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:42:39,961 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:39,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:39,962 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:39,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:40,007 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-22 02:42:40,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-22 02:42:40,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:40,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:40,064 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-22 02:42:40,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-22 02:42:40,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:40,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-22 02:42:40,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:40,164 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 02:42:40,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-22 02:42:40,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:42:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:40,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-22 02:42:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:40,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:40,322 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-22 02:42:40,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-22 02:42:40,385 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 02:42:40,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:42:40,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:40,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3343#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:42:40,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:40,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:40,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 121 [2022-11-22 02:42:40,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066539195] [2022-11-22 02:42:40,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:40,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-11-22 02:42:40,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:40,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-11-22 02:42:40,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7632, Invalid=8118, Unknown=0, NotChecked=0, Total=15750 [2022-11-22 02:42:40,689 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:43,450 INFO L93 Difference]: Finished difference Result 600 states and 700 transitions. [2022-11-22 02:42:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-11-22 02:42:43,451 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-22 02:42:43,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:43,453 INFO L225 Difference]: With dead ends: 600 [2022-11-22 02:42:43,454 INFO L226 Difference]: Without dead ends: 548 [2022-11-22 02:42:43,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5769 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7632, Invalid=8118, Unknown=0, NotChecked=0, Total=15750 [2022-11-22 02:42:43,459 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1284 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 911 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 911 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:43,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1284 Valid, 285 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [911 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:42:43,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-11-22 02:42:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 197. [2022-11-22 02:42:43,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2022-11-22 02:42:43,479 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 98 [2022-11-22 02:42:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:43,479 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2022-11-22 02:42:43,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:42:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2022-11-22 02:42:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-22 02:42:43,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:43,483 INFO L195 NwaCegarLoop]: trace histogram [118, 71, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:43,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-22 02:42:43,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 02:42:43,690 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:43,691 INFO L85 PathProgramCache]: Analyzing trace with hash 441992634, now seen corresponding path program 7 times [2022-11-22 02:42:43,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:43,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958904760] [2022-11-22 02:42:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:43,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2022-11-22 02:42:50,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:50,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958904760] [2022-11-22 02:42:50,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958904760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:50,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838009251] [2022-11-22 02:42:50,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:42:50,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:50,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:50,176 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:50,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:42:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:50,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-22 02:42:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2022-11-22 02:42:52,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2022-11-22 02:43:06,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838009251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:43:06,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890655586] [2022-11-22 02:43:06,477 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:43:06,478 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:43:06,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:43:06,478 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:43:06,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:43:06,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:06,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:06,544 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-22 02:43:06,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-22 02:43:06,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:06,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:06,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-22 02:43:06,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:06,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 02:43:06,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:06,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:43:06,725 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 02:43:06,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-22 02:43:06,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:06,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:43:06,960 INFO L321 Elim1Store]: treesize reduction 123, result has 23.1 percent of original size [2022-11-22 02:43:06,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 103 [2022-11-22 02:43:07,033 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-22 02:43:07,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:43:07,048 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:43:07,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6066#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:43:07,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:43:07,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:43:07,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 120, 120] total 254 [2022-11-22 02:43:07,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511584719] [2022-11-22 02:43:07,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:07,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 254 states [2022-11-22 02:43:07,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:07,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2022-11-22 02:43:07,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32902, Invalid=33920, Unknown=0, NotChecked=0, Total=66822 [2022-11-22 02:43:07,355 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:43:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:30,734 INFO L93 Difference]: Finished difference Result 1124 states and 1321 transitions. [2022-11-22 02:43:30,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-11-22 02:43:30,735 INFO L78 Accepts]: Start accepts. Automaton has has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-11-22 02:43:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:30,740 INFO L225 Difference]: With dead ends: 1124 [2022-11-22 02:43:30,741 INFO L226 Difference]: Without dead ends: 1047 [2022-11-22 02:43:30,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25651 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=32902, Invalid=33920, Unknown=0, NotChecked=0, Total=66822 [2022-11-22 02:43:30,746 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2832 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 1692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2832 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1692 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:30,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2832 Valid, 573 Invalid, 2526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1692 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-22 02:43:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-11-22 02:43:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 391. [2022-11-22 02:43:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0076923076923077) internal successors, (393), 390 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:43:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 393 transitions. [2022-11-22 02:43:30,785 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 393 transitions. Word has length 195 [2022-11-22 02:43:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:30,786 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 393 transitions. [2022-11-22 02:43:30,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:43:30,787 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 393 transitions. [2022-11-22 02:43:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-11-22 02:43:30,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:30,798 INFO L195 NwaCegarLoop]: trace histogram [251, 132, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:30,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:31,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:31,007 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:31,008 INFO L85 PathProgramCache]: Analyzing trace with hash 564943249, now seen corresponding path program 8 times [2022-11-22 02:43:31,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:31,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15845927] [2022-11-22 02:43:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:31,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 40404 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 31626 trivial. 0 not checked. [2022-11-22 02:43:50,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:50,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15845927] [2022-11-22 02:43:50,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15845927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:43:50,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24723914] [2022-11-22 02:43:50,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:43:50,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:50,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:50,731 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:50,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e15ff-07a0-465e-bd6d-719e186e6973/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process