./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/mods.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/mods.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7 --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 f15d84a1f588b4a2fae1a1f53311fed1d9572550b31409f886696465cdc8f8ba --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:10:06,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:10:06,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:10:06,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:10:06,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:10:06,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:10:06,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:10:06,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:10:06,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:10:06,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:10:06,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:10:06,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:10:06,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:10:06,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:10:06,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:10:06,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:10:06,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:10:06,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:10:06,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:10:06,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:10:06,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:10:06,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:10:06,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:10:06,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:10:06,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:10:06,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:10:06,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:10:06,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:10:06,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:10:06,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:10:06,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:10:06,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:10:06,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:10:06,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:10:06,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:10:06,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:10:06,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:10:06,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:10:06,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:10:06,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:10:06,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:10:06,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:10:06,406 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:10:06,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:10:06,407 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:10:06,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:10:06,415 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:10:06,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:10:06,415 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:10:06,416 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:10:06,416 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:10:06,416 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:10:06,417 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:10:06,417 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:10:06,418 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:10:06,418 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:10:06,418 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:10:06,418 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:10:06,419 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:10:06,419 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:10:06,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:10:06,420 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:10:06,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:10:06,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:10:06,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:10:06,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:10:06,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:10:06,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:10:06,421 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:10:06,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:10:06,422 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:10:06,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:10:06,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:10:06,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:10:06,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:10:06,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:10:06,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:10:06,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:10:06,424 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:10:06,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:10:06,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:10:06,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:10:06,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:10:06,425 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f15d84a1f588b4a2fae1a1f53311fed1d9572550b31409f886696465cdc8f8ba [2021-11-25 20:10:06,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:10:06,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:10:06,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:10:06,691 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:10:06,691 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:10:06,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-fpi/mods.c [2021-11-25 20:10:06,774 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/data/05a3ecd7d/a3cc26f30d77492ea539fd354d7c24a5/FLAGd81cc7525 [2021-11-25 20:10:07,187 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:10:07,187 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/sv-benchmarks/c/array-fpi/mods.c [2021-11-25 20:10:07,193 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/data/05a3ecd7d/a3cc26f30d77492ea539fd354d7c24a5/FLAGd81cc7525 [2021-11-25 20:10:07,210 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/data/05a3ecd7d/a3cc26f30d77492ea539fd354d7c24a5 [2021-11-25 20:10:07,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:10:07,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:10:07,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:10:07,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:10:07,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:10:07,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a710d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07, skipping insertion in model container [2021-11-25 20:10:07,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:10:07,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:10:07,417 WARN L230 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_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/sv-benchmarks/c/array-fpi/mods.c[587,600] [2021-11-25 20:10:07,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:10:07,474 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:10:07,493 WARN L230 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_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/sv-benchmarks/c/array-fpi/mods.c[587,600] [2021-11-25 20:10:07,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:10:07,531 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:10:07,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07 WrapperNode [2021-11-25 20:10:07,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:10:07,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:10:07,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:10:07,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:10:07,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,590 INFO L137 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 104 [2021-11-25 20:10:07,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:10:07,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:10:07,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:10:07,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:10:07,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:10:07,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:10:07,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:10:07,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:10:07,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07" (1/1) ... [2021-11-25 20:10:07,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:10:07,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:10:07,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:10:07,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:10:07,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:10:07,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:10:07,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:10:07,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:10:07,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:10:07,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:10:07,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:10:07,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:10:07,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:10:07,868 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:10:07,870 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:10:08,080 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:10:08,128 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:10:08,128 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 20:10:08,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:10:08 BoogieIcfgContainer [2021-11-25 20:10:08,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:10:08,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:10:08,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:10:08,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:10:08,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:10:07" (1/3) ... [2021-11-25 20:10:08,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30fc5a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:10:08, skipping insertion in model container [2021-11-25 20:10:08,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:10:07" (2/3) ... [2021-11-25 20:10:08,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30fc5a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:10:08, skipping insertion in model container [2021-11-25 20:10:08,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:10:08" (3/3) ... [2021-11-25 20:10:08,142 INFO L111 eAbstractionObserver]: Analyzing ICFG mods.c [2021-11-25 20:10:08,147 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:10:08,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:10:08,196 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:10:08,204 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:10:08,205 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:10:08,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 20:10:08,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:10:08,251 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:10:08,251 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:10:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:10:08,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1473824747, now seen corresponding path program 1 times [2021-11-25 20:10:08,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:10:08,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645319091] [2021-11-25 20:10:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:10:08,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:10:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:10:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:08,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:10:08,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645319091] [2021-11-25 20:10:08,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645319091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:10:08,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:10:08,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:10:08,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161221584] [2021-11-25 20:10:08,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:10:08,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:10:08,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:10:08,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:10:08,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:10:08,553 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:10:08,616 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2021-11-25 20:10:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:10:08,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 20:10:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:10:08,627 INFO L225 Difference]: With dead ends: 24 [2021-11-25 20:10:08,627 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 20:10:08,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:10:08,633 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:10:08,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:10:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 20:10:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-25 20:10:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-11-25 20:10:08,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2021-11-25 20:10:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:10:08,667 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-11-25 20:10:08,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2021-11-25 20:10:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:10:08,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:10:08,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:10:08,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:10:08,669 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:10:08,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:10:08,670 INFO L85 PathProgramCache]: Analyzing trace with hash -332942029, now seen corresponding path program 1 times [2021-11-25 20:10:08,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:10:08,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744099025] [2021-11-25 20:10:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:10:08,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:10:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:10:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:10:08,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:10:08,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744099025] [2021-11-25 20:10:08,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744099025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:10:08,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:10:08,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:10:08,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765857661] [2021-11-25 20:10:08,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:10:08,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:10:08,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:10:08,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:10:08,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:10:08,774 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:08,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:10:08,840 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2021-11-25 20:10:08,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:10:08,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 20:10:08,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:10:08,843 INFO L225 Difference]: With dead ends: 27 [2021-11-25 20:10:08,843 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 20:10:08,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:10:08,849 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:10:08,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:10:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 20:10:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2021-11-25 20:10:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-25 20:10:08,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2021-11-25 20:10:08,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:10:08,855 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-25 20:10:08,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:08,856 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-25 20:10:08,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:10:08,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:10:08,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:10:08,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:10:08,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:10:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:10:08,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1080912201, now seen corresponding path program 1 times [2021-11-25 20:10:08,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:10:08,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698253065] [2021-11-25 20:10:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:10:08,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:10:08,893 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:10:08,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328354019] [2021-11-25 20:10:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:10:08,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:08,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:10:08,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:10:08,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:10:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:10:09,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-25 20:10:09,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:10:09,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 20:10:09,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:10:09,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 18 [2021-11-25 20:10:09,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2021-11-25 20:10:09,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 20:10:09,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 50 [2021-11-25 20:10:09,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2021-11-25 20:10:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:09,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:10:12,370 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_54 Int)) (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_54)))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (+ (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_54))) (mod .cse0 (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))))) 0) (< v_ArrVal_54 (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8))) (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) is different from false [2021-11-25 20:10:14,418 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_54 Int)) (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_54)))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (+ (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_54))) (mod .cse0 (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))))) 0) (< v_ArrVal_54 (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) is different from false [2021-11-25 20:10:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 20:10:18,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:10:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698253065] [2021-11-25 20:10:18,559 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:10:18,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328354019] [2021-11-25 20:10:18,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328354019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:10:18,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745726917] [2021-11-25 20:10:18,581 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:10:18,581 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:10:18,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:10:18,591 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:10:18,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:10:18,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:18,684 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:10:18,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:10:18,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:18,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:18,774 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:10:18,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 20:10:18,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:18,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:18,889 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:10:18,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:10:18,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:10:19,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 39 [2021-11-25 20:10:19,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:10:19,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:19,100 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:19,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-25 20:10:19,196 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:19,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:10:19,302 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:10:19,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:19,379 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:19,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2021-11-25 20:10:19,469 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:10:19,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:10:19,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:19,637 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-25 20:10:19,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 68 [2021-11-25 20:10:19,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:20,243 INFO L354 Elim1Store]: treesize reduction 132, result has 32.3 percent of original size [2021-11-25 20:10:20,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 186 [2021-11-25 20:10:22,210 INFO L354 Elim1Store]: treesize reduction 60, result has 40.0 percent of original size [2021-11-25 20:10:22,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2021-11-25 20:10:22,281 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:10:22,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '234#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:10:22,782 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:10:22,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:10:22,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-25 20:10:22,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807024513] [2021-11-25 20:10:22,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:10:22,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 20:10:22,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:10:22,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 20:10:22,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=474, Unknown=3, NotChecked=90, Total=650 [2021-11-25 20:10:22,787 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:31,333 WARN L227 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 46 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:10:33,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:10:35,372 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:10:37,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:10:39,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:10:41,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:10:41,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:10:41,994 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-25 20:10:41,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:10:41,994 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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 13 [2021-11-25 20:10:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:10:41,995 INFO L225 Difference]: With dead ends: 29 [2021-11-25 20:10:41,995 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 20:10:41,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=103, Invalid=604, Unknown=3, NotChecked=102, Total=812 [2021-11-25 20:10:41,997 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 19 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:10:41,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 150 Invalid, 5 Unknown, 59 Unchecked, 10.4s Time] [2021-11-25 20:10:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 20:10:42,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-25 20:10:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:42,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2021-11-25 20:10:42,004 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 13 [2021-11-25 20:10:42,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:10:42,005 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2021-11-25 20:10:42,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2021-11-25 20:10:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 20:10:42,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:10:42,007 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:10:42,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:10:42,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:42,220 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:10:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:10:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1737417492, now seen corresponding path program 2 times [2021-11-25 20:10:42,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:10:42,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136597563] [2021-11-25 20:10:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:10:42,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:10:42,247 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:10:42,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470201150] [2021-11-25 20:10:42,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:10:42,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:42,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:10:42,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:10:42,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:10:42,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:10:42,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:10:42,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:10:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:10:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:10:42,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:10:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:10:42,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:10:42,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136597563] [2021-11-25 20:10:42,480 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:10:42,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470201150] [2021-11-25 20:10:42,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470201150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:10:42,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488351660] [2021-11-25 20:10:42,488 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:10:42,488 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:10:42,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:10:42,489 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:10:42,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:10:42,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:42,544 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:10:42,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:10:42,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:42,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:42,625 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:10:42,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 20:10:42,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:42,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:42,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:42,722 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:10:42,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:10:42,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:10:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:42,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 39 [2021-11-25 20:10:42,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:10:42,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:42,859 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:10:42,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 20:10:42,927 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:42,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:10:42,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:42,997 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:42,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-25 20:10:43,062 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:10:43,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:10:43,138 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:10:43,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:10:43,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:43,411 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-25 20:10:43,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 73 [2021-11-25 20:10:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:43,686 INFO L354 Elim1Store]: treesize reduction 77, result has 34.2 percent of original size [2021-11-25 20:10:43,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 211 treesize of output 172 [2021-11-25 20:10:44,488 INFO L354 Elim1Store]: treesize reduction 60, result has 40.0 percent of original size [2021-11-25 20:10:44,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2021-11-25 20:10:44,534 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:10:44,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '423#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:10:44,845 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:10:44,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:10:44,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-25 20:10:44,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991307043] [2021-11-25 20:10:44,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:10:44,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:10:44,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:10:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:10:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:10:44,847 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:10:44,961 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2021-11-25 20:10:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:10:44,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 20:10:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:10:44,963 INFO L225 Difference]: With dead ends: 61 [2021-11-25 20:10:44,963 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 20:10:44,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:10:44,964 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:10:44,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:10:44,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 20:10:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2021-11-25 20:10:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-25 20:10:44,970 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2021-11-25 20:10:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:10:44,970 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-25 20:10:44,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-25 20:10:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:10:44,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:10:44,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:10:44,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:10:45,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:45,176 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:10:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:10:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash 996737740, now seen corresponding path program 3 times [2021-11-25 20:10:45,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:10:45,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982008384] [2021-11-25 20:10:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:10:45,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:10:45,208 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:10:45,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418995238] [2021-11-25 20:10:45,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:10:45,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:45,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:10:45,210 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:10:45,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:10:45,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:10:45,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:10:45,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:10:45,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:10:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:10:45,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:10:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:10:45,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:10:45,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982008384] [2021-11-25 20:10:45,363 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:10:45,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418995238] [2021-11-25 20:10:45,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418995238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:10:45,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114163892] [2021-11-25 20:10:45,365 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:10:45,366 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:10:45,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:10:45,366 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:10:45,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:10:45,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,465 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:10:45,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:10:45,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:10:45,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:10:45,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:10:45,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:45,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:45,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:45,733 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-25 20:10:45,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 27 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:10:45,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:10:45,872 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:45,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-25 20:10:45,952 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:45,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:10:46,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:46,030 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:46,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-25 20:10:46,096 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:10:46,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:10:46,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:46,215 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-25 20:10:46,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 73 [2021-11-25 20:10:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:46,860 INFO L354 Elim1Store]: treesize reduction 69, result has 41.0 percent of original size [2021-11-25 20:10:46,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 236 treesize of output 205 [2021-11-25 20:10:47,310 INFO L354 Elim1Store]: treesize reduction 60, result has 40.0 percent of original size [2021-11-25 20:10:47,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2021-11-25 20:10:47,371 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:10:47,758 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '662#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:10:47,758 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:10:47,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:10:47,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 20:10:47,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503163501] [2021-11-25 20:10:47,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:10:47,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:10:47,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:10:47,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:10:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:10:47,759 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:10:47,902 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-11-25 20:10:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:10:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 20:10:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:10:47,903 INFO L225 Difference]: With dead ends: 35 [2021-11-25 20:10:47,903 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 20:10:47,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:10:47,905 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:10:47,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 18 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:10:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 20:10:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-11-25 20:10:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-25 20:10:47,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 15 [2021-11-25 20:10:47,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:10:47,910 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-25 20:10:47,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:47,910 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-25 20:10:47,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 20:10:47,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:10:47,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:10:47,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:10:48,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:48,112 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:10:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:10:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1834853461, now seen corresponding path program 4 times [2021-11-25 20:10:48,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:10:48,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760112177] [2021-11-25 20:10:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:10:48,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:10:48,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:10:48,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175226407] [2021-11-25 20:10:48,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:10:48,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:48,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:10:48,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:10:48,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:10:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:10:48,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-25 20:10:48,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:10:48,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2021-11-25 20:10:48,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 23 [2021-11-25 20:10:48,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:10:48,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:48,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2021-11-25 20:10:48,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 47 treesize of output 35 [2021-11-25 20:10:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 42 [2021-11-25 20:10:48,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 49 treesize of output 35 [2021-11-25 20:10:48,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 47 treesize of output 37 [2021-11-25 20:10:48,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-25 20:10:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:48,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:10:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:55,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:10:55,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760112177] [2021-11-25 20:10:55,150 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:10:55,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175226407] [2021-11-25 20:10:55,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175226407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:10:55,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996217182] [2021-11-25 20:10:55,153 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:10:55,153 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:10:55,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:10:55,154 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:10:55,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:10:55,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,270 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:10:55,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:10:55,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:10:55,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:10:55,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:10:55,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:55,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:55,548 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-25 20:10:55,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 27 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:10:55,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:10:55,691 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:55,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-25 20:10:55,760 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:55,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:10:55,843 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:55,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:10:55,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:55,890 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:55,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2021-11-25 20:10:55,943 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:10:55,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:10:55,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:56,059 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-25 20:10:56,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 73 [2021-11-25 20:10:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:56,292 INFO L354 Elim1Store]: treesize reduction 77, result has 34.2 percent of original size [2021-11-25 20:10:56,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 236 treesize of output 197 [2021-11-25 20:10:56,891 INFO L354 Elim1Store]: treesize reduction 60, result has 40.0 percent of original size [2021-11-25 20:10:56,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2021-11-25 20:10:56,931 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:10:57,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '888#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:10:57,803 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:10:57,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:10:57,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-11-25 20:10:57,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629268486] [2021-11-25 20:10:57,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:10:57,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 20:10:57,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:10:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 20:10:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 20:10:57,805 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 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) [2021-11-25 20:10:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:10:58,250 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-11-25 20:10:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 20:10:58,251 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 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 17 [2021-11-25 20:10:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:10:58,252 INFO L225 Difference]: With dead ends: 37 [2021-11-25 20:10:58,252 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 20:10:58,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 20:10:58,253 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:10:58,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2021-11-25 20:10:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 20:10:58,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-11-25 20:10:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-11-25 20:10:58,261 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2021-11-25 20:10:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:10:58,261 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-11-25 20:10:58,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 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) [2021-11-25 20:10:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-11-25 20:10:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:10:58,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:10:58,262 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:10:58,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:10:58,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 20:10:58,484 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:10:58,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:10:58,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1784474046, now seen corresponding path program 5 times [2021-11-25 20:10:58,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:10:58,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928060102] [2021-11-25 20:10:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:10:58,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:10:58,522 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:10:58,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513169648] [2021-11-25 20:10:58,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:10:58,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:58,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:10:58,537 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:10:58,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:10:58,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:10:58,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:10:58,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:10:58,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:10:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:10:58,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:10:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:10:58,794 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:10:58,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928060102] [2021-11-25 20:10:58,794 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:10:58,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513169648] [2021-11-25 20:10:58,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513169648] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:10:58,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906441327] [2021-11-25 20:10:58,797 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:10:58,797 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:10:58,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:10:58,797 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:10:58,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:10:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:58,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:58,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:58,892 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:10:58,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:10:58,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:58,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:10:58,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:58,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:58,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:10:58,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:58,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:58,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-25 20:10:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:59,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:59,180 INFO L354 Elim1Store]: treesize reduction 169, result has 11.5 percent of original size [2021-11-25 20:10:59,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 22 case distinctions, treesize of input 430 treesize of output 419 [2021-11-25 20:10:59,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:10:59,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:59,312 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:10:59,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 20:10:59,375 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:59,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:10:59,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:59,426 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:59,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2021-11-25 20:10:59,488 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:10:59,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:10:59,600 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-25 20:10:59,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 68 [2021-11-25 20:10:59,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:00,063 INFO L354 Elim1Store]: treesize reduction 132, result has 32.3 percent of original size [2021-11-25 20:11:00,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 234 treesize of output 211 [2021-11-25 20:11:02,623 INFO L354 Elim1Store]: treesize reduction 60, result has 40.0 percent of original size [2021-11-25 20:11:02,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2021-11-25 20:11:02,666 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:11:02,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1131#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:11:02,989 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:11:02,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:11:02,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-25 20:11:02,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096114647] [2021-11-25 20:11:02,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:11:02,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:11:02,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:11:02,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:11:02,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:11:02,991 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:03,154 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2021-11-25 20:11:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:11:03,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 [2021-11-25 20:11:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:03,156 INFO L225 Difference]: With dead ends: 81 [2021-11-25 20:11:03,156 INFO L226 Difference]: Without dead ends: 61 [2021-11-25 20:11:03,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:11:03,157 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:03,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 30 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-25 20:11:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-11-25 20:11:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:03,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-25 20:11:03,167 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 18 [2021-11-25 20:11:03,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:03,167 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-25 20:11:03,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:03,168 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-25 20:11:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 20:11:03,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:03,169 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:03,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:03,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 20:11:03,384 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:11:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2144309898, now seen corresponding path program 6 times [2021-11-25 20:11:03,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:11:03,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407955473] [2021-11-25 20:11:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:03,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:11:03,403 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:11:03,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122227358] [2021-11-25 20:11:03,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:11:03,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:03,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:03,405 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:03,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:11:03,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:11:03,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:11:03,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:11:03,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:11:03,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:11:03,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:11:03,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407955473] [2021-11-25 20:11:03,609 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:11:03,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122227358] [2021-11-25 20:11:03,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122227358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:03,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [116140] [2021-11-25 20:11:03,612 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:11:03,612 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:11:03,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:11:03,613 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:11:03,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:11:03,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,671 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:11:03,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:11:03,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,744 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:11:03,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 20:11:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,828 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:11:03,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:11:03,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:11:03,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 39 [2021-11-25 20:11:03,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:11:03,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:03,943 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:11:03,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 20:11:04,002 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:11:04,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:11:04,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:04,047 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:11:04,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-25 20:11:04,130 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:11:04,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:11:04,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:04,293 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-25 20:11:04,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 73 [2021-11-25 20:11:04,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:04,546 INFO L354 Elim1Store]: treesize reduction 77, result has 34.2 percent of original size [2021-11-25 20:11:04,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 211 treesize of output 172 [2021-11-25 20:11:04,995 INFO L354 Elim1Store]: treesize reduction 60, result has 40.0 percent of original size [2021-11-25 20:11:04,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2021-11-25 20:11:05,049 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:11:05,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1466#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:11:05,339 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:11:05,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:11:05,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 20:11:05,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285481797] [2021-11-25 20:11:05,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:11:05,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:11:05,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:11:05,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:11:05,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:11:05,341 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:05,543 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2021-11-25 20:11:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:11:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 19 [2021-11-25 20:11:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:05,545 INFO L225 Difference]: With dead ends: 72 [2021-11-25 20:11:05,545 INFO L226 Difference]: Without dead ends: 54 [2021-11-25 20:11:05,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:11:05,546 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:05,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-25 20:11:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-11-25 20:11:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-25 20:11:05,554 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 19 [2021-11-25 20:11:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:05,555 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-25 20:11:05,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-25 20:11:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 20:11:05,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:05,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:05,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 20:11:05,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 20:11:05,764 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:11:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:05,765 INFO L85 PathProgramCache]: Analyzing trace with hash -65478855, now seen corresponding path program 1 times [2021-11-25 20:11:05,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:11:05,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305408386] [2021-11-25 20:11:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:05,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:11:05,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:11:05,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481644788] [2021-11-25 20:11:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:05,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:05,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:05,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:05,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:11:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:05,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-25 20:11:05,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:05,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2021-11-25 20:11:05,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:05,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 23 [2021-11-25 20:11:06,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:11:06,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 45 treesize of output 35 [2021-11-25 20:11:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 47 treesize of output 35 [2021-11-25 20:11:06,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:06,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 42 [2021-11-25 20:11:06,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 65 treesize of output 39 [2021-11-25 20:11:06,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 47 treesize of output 37 [2021-11-25 20:11:06,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 59 treesize of output 41 [2021-11-25 20:11:06,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:06,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 34 [2021-11-25 20:11:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:07,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:23,758 WARN L227 SmtUtils]: Spent 11.56s on a formula simplification. DAG size of input: 77 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:11:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:42,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:11:42,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305408386] [2021-11-25 20:11:42,991 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:11:42,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481644788] [2021-11-25 20:11:42,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481644788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:42,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824678352] [2021-11-25 20:11:42,993 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 20:11:42,993 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:11:42,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:11:42,994 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:11:42,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:11:43,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,041 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:11:43,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:11:43,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,126 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:11:43,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:11:43,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:11:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:11:43,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:43,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:43,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:43,378 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-25 20:11:43,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 27 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:11:43,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:11:43,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:43,566 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:11:43,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 20:11:43,620 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:11:43,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:11:43,669 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:11:43,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-25 20:11:43,732 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:11:43,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:11:43,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:43,822 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-25 20:11:43,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 73 [2021-11-25 20:11:43,917 INFO L354 Elim1Store]: treesize reduction 60, result has 40.0 percent of original size [2021-11-25 20:11:43,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2021-11-25 20:11:44,101 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:11:46,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1815#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:11:46,601 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:11:46,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:11:46,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2021-11-25 20:11:46,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713122273] [2021-11-25 20:11:46,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:11:46,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 20:11:46,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:11:46,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 20:11:46,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1239, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 20:11:46,604 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:53,052 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse65 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse31 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse65))) (let ((.cse8 (select .cse3 .cse7)) (.cse30 (select .cse31 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse36 (+ .cse8 .cse30))) (let ((.cse54 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse31 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse36))) (.cse4 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse5 (+ .cse30 1)) (.cse32 (+ .cse4 .cse30)) (.cse21 (store .cse3 .cse7 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse57 (select .cse54 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse22 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse65 8))) (and (let ((.cse0 (store .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| (mod .cse4 .cse5)))) (let ((.cse2 (mod (select .cse0 .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse0 .cse1 .cse2) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse2 0)))) (let ((.cse6 (store .cse3 .cse7 (mod .cse8 .cse5)))) (or (not (= (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= (select .cse6 .cse1) 0))) (let ((.cse20 (store .cse21 .cse22 1))) (let ((.cse18 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse20))) (let ((.cse19 (select .cse18 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse15 (select .cse19 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse16 (select .cse20 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse17 (select (select (store .cse18 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse15 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse11 (store .cse18 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse15 .cse16 .cse17))))) (let ((.cse10 (let ((.cse12 (let ((.cse13 (let ((.cse14 (select .cse11 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse14 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse15 .cse16 .cse17))))) (store .cse13 .cse1 (+ (select (select (store .cse11 |c_ULTIMATE.start_main_~a~0#1.base| .cse13) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse13 .cse1)))))) (store .cse12 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse11 |c_ULTIMATE.start_main_~a~0#1.base| .cse12) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse9 (mod (select .cse10 .cse1) (+ (select (select (store .cse11 |c_ULTIMATE.start_main_~a~0#1.base| .cse10) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (= .cse9 0) (not (= (select (store .cse10 .cse1 .cse9) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))))))))) (let ((.cse29 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse31 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse32)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse25 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse31 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse29 .cse30))))) (let ((.cse23 (let ((.cse26 (let ((.cse27 (let ((.cse28 (select .cse25 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse28 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse4 .cse29 .cse30 (select .cse28 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (store .cse27 .cse1 (+ (select (select (store .cse25 |c_ULTIMATE.start_main_~a~0#1.base| .cse27) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse27 .cse1)))))) (store .cse26 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse26 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse25 |c_ULTIMATE.start_main_~a~0#1.base| .cse26) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse24 (mod (select .cse23 .cse1) (+ (select (select (store .cse25 |c_ULTIMATE.start_main_~a~0#1.base| .cse23) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse23 .cse1 .cse24) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse24 0)))))) (let ((.cse33 (let ((.cse35 (store .cse3 .cse7 .cse36))) (store .cse35 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse35 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse35) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse34 (mod (select .cse33 .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse33) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse33 .cse1 .cse34) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= 0 .cse34)))) (let ((.cse37 (let ((.cse39 (let ((.cse40 (store .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| .cse32))) (store .cse40 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse40) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse40 .cse1)))))) (store .cse39 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse39 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse39) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse38 (mod (select .cse37 .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse37) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= 0 (select (store .cse37 .cse1 .cse38) |c_ULTIMATE.start_main_~a~0#1.offset|))) (= .cse38 0)))) (let ((.cse50 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse21))) (let ((.cse51 (select .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse48 (select .cse21 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse49 (select .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse47 (select (select (store .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse48 .cse49))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse43 (store .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse47 .cse48 .cse49))))) (let ((.cse41 (let ((.cse44 (let ((.cse45 (let ((.cse46 (select .cse43 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse46 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse46 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse47 .cse48 .cse49))))) (store .cse45 .cse1 (+ (select (select (store .cse43 |c_ULTIMATE.start_main_~a~0#1.base| .cse45) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse45 .cse1)))))) (store .cse44 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse44 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse43 |c_ULTIMATE.start_main_~a~0#1.base| .cse44) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse42 (mod (select .cse41 .cse1) (+ (select (select (store .cse43 |c_ULTIMATE.start_main_~a~0#1.base| .cse41) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse41 .cse1 .cse42) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse42 0))))))))) (let ((.cse52 (let ((.cse55 (let ((.cse56 (store .cse57 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse57 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse8 .cse30)))) (store .cse56 .cse1 (+ (select .cse56 .cse1) (select (select (store .cse54 |c_ULTIMATE.start_main_~a~0#1.base| .cse56) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse55 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse55 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse54 |c_ULTIMATE.start_main_~a~0#1.base| .cse55) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse53 (mod (select .cse52 .cse1) (+ (select (select (store .cse54 |c_ULTIMATE.start_main_~a~0#1.base| .cse52) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse52 .cse1 .cse53) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse53 0)))) (or (not (= .cse4 0)) (= (select .cse3 .cse1) 0)) (let ((.cse64 (select .cse57 .cse22))) (let ((.cse60 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse31 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse30 .cse64))))) (let ((.cse58 (let ((.cse61 (let ((.cse62 (let ((.cse63 (select .cse60 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse63 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse8 (select .cse63 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse30 .cse64))))) (store .cse62 .cse1 (+ (select .cse62 .cse1) (select (select (store .cse60 |c_ULTIMATE.start_main_~a~0#1.base| .cse62) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse61 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse61 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse60 |c_ULTIMATE.start_main_~a~0#1.base| .cse61) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse59 (mod (select .cse58 .cse1) (+ (select (select (store .cse60 |c_ULTIMATE.start_main_~a~0#1.base| .cse58) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse58 .cse1 .cse59) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse59 0))))))))))))) is different from false [2021-11-25 20:11:55,061 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse65 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse31 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse65))) (let ((.cse8 (select .cse3 .cse7)) (.cse30 (select .cse31 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse36 (+ .cse8 .cse30))) (let ((.cse54 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse31 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse36))) (.cse4 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse5 (+ .cse30 1)) (.cse32 (+ .cse4 .cse30)) (.cse21 (store .cse3 .cse7 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse57 (select .cse54 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse22 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse65 8))) (and (let ((.cse0 (store .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| (mod .cse4 .cse5)))) (let ((.cse2 (mod (select .cse0 .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse0 .cse1 .cse2) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse2 0)))) (let ((.cse6 (store .cse3 .cse7 (mod .cse8 .cse5)))) (or (not (= (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= (select .cse6 .cse1) 0))) (let ((.cse20 (store .cse21 .cse22 1))) (let ((.cse18 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse20))) (let ((.cse19 (select .cse18 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse15 (select .cse19 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse16 (select .cse20 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse17 (select (select (store .cse18 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse15 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse11 (store .cse18 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse15 .cse16 .cse17))))) (let ((.cse10 (let ((.cse12 (let ((.cse13 (let ((.cse14 (select .cse11 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse14 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse15 .cse16 .cse17))))) (store .cse13 .cse1 (+ (select (select (store .cse11 |c_ULTIMATE.start_main_~a~0#1.base| .cse13) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse13 .cse1)))))) (store .cse12 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse11 |c_ULTIMATE.start_main_~a~0#1.base| .cse12) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse9 (mod (select .cse10 .cse1) (+ (select (select (store .cse11 |c_ULTIMATE.start_main_~a~0#1.base| .cse10) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (= .cse9 0) (not (= (select (store .cse10 .cse1 .cse9) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))))))))) (let ((.cse29 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse31 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse32)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse25 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse31 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse29 .cse30))))) (let ((.cse23 (let ((.cse26 (let ((.cse27 (let ((.cse28 (select .cse25 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse28 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse4 .cse29 .cse30 (select .cse28 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (store .cse27 .cse1 (+ (select (select (store .cse25 |c_ULTIMATE.start_main_~a~0#1.base| .cse27) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse27 .cse1)))))) (store .cse26 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse26 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse25 |c_ULTIMATE.start_main_~a~0#1.base| .cse26) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse24 (mod (select .cse23 .cse1) (+ (select (select (store .cse25 |c_ULTIMATE.start_main_~a~0#1.base| .cse23) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse23 .cse1 .cse24) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse24 0)))))) (let ((.cse33 (let ((.cse35 (store .cse3 .cse7 .cse36))) (store .cse35 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse35 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse35) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse34 (mod (select .cse33 .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse33) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse33 .cse1 .cse34) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= 0 .cse34)))) (let ((.cse37 (let ((.cse39 (let ((.cse40 (store .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| .cse32))) (store .cse40 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse40) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse40 .cse1)))))) (store .cse39 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse39 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse39) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse38 (mod (select .cse37 .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse37) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= 0 (select (store .cse37 .cse1 .cse38) |c_ULTIMATE.start_main_~a~0#1.offset|))) (= .cse38 0)))) (let ((.cse50 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse21))) (let ((.cse51 (select .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse48 (select .cse21 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse49 (select .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse47 (select (select (store .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse48 .cse49))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse43 (store .cse50 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse51 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse47 .cse48 .cse49))))) (let ((.cse41 (let ((.cse44 (let ((.cse45 (let ((.cse46 (select .cse43 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse46 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse46 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse47 .cse48 .cse49))))) (store .cse45 .cse1 (+ (select (select (store .cse43 |c_ULTIMATE.start_main_~a~0#1.base| .cse45) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse45 .cse1)))))) (store .cse44 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse44 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse43 |c_ULTIMATE.start_main_~a~0#1.base| .cse44) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse42 (mod (select .cse41 .cse1) (+ (select (select (store .cse43 |c_ULTIMATE.start_main_~a~0#1.base| .cse41) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse41 .cse1 .cse42) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse42 0))))))))) (let ((.cse52 (let ((.cse55 (let ((.cse56 (store .cse57 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse57 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse8 .cse30)))) (store .cse56 .cse1 (+ (select .cse56 .cse1) (select (select (store .cse54 |c_ULTIMATE.start_main_~a~0#1.base| .cse56) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse55 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse55 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse54 |c_ULTIMATE.start_main_~a~0#1.base| .cse55) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse53 (mod (select .cse52 .cse1) (+ (select (select (store .cse54 |c_ULTIMATE.start_main_~a~0#1.base| .cse52) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse52 .cse1 .cse53) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse53 0)))) (or (not (= .cse4 0)) (= (select .cse3 .cse1) 0)) (let ((.cse64 (select .cse57 .cse22))) (let ((.cse60 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse31 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse30 .cse64))))) (let ((.cse58 (let ((.cse61 (let ((.cse62 (let ((.cse63 (select .cse60 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse63 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse8 (select .cse63 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse30 .cse64))))) (store .cse62 .cse1 (+ (select .cse62 .cse1) (select (select (store .cse60 |c_ULTIMATE.start_main_~a~0#1.base| .cse62) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse61 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse61 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse60 |c_ULTIMATE.start_main_~a~0#1.base| .cse61) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse59 (mod (select .cse58 .cse1) (+ (select (select (store .cse60 |c_ULTIMATE.start_main_~a~0#1.base| .cse58) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse58 .cse1 .cse59) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse59 0))))))))))))) is different from true [2021-11-25 20:12:33,460 WARN L227 SmtUtils]: Spent 15.51s on a formula simplification. DAG size of input: 220 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:12:37,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:12:40,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:13:17,158 WARN L227 SmtUtils]: Spent 11.19s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:13:19,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:13:22,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:13:24,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:13:27,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:13:29,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:13:34,287 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse50 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse43 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse40 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse41 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse50))) (let ((.cse47 (select .cse40 .cse41)) (.cse45 (+ .cse43 1))) (let ((.cse42 (mod .cse47 .cse45))) (let ((.cse37 (= .cse42 0)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse15 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse50 8)) (.cse0 (store .cse40 .cse41 .cse42)) (.cse22 (store .cse40 .cse41 (+ .cse47 .cse43)))) (let ((.cse23 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse22) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse14 (store .cse40 .cse41 1)) (.cse44 (let ((.cse49 (store .cse0 .cse15 (mod (select .cse0 .cse15) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))))) (or (and (not .cse37) (< .cse47 0)) (= (select .cse49 .cse1) 0) (not (= (select .cse49 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (or (not (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= (select .cse0 .cse1) 0)) (let ((.cse13 (store .cse14 .cse15 1))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse13))) (let ((.cse12 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse9 (select .cse13 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse10 (select (select (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse4 (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9 .cse10))))) (let ((.cse3 (let ((.cse5 (let ((.cse6 (let ((.cse7 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse7 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse8 .cse9 .cse10))))) (store .cse6 .cse1 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse6) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse6 .cse1)))))) (store .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse2 (mod (select .cse3 .cse1) (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (= .cse2 0) (not (= (select (store .cse3 .cse1 .cse2) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))))))))) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse18 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse16 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse17 (mod 3 (+ .cse18 1)))) (and (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (= (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse17) (= 2 .cse18) (= (select .cse16 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) .cse17))))) (let ((.cse20 (let ((.cse21 (store .cse22 .cse15 (+ .cse23 (select .cse22 .cse15))))) (store .cse21 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse21 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse21) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse19 (mod (select .cse20 .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse20) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (= .cse19 0) (not (= (select (store .cse20 .cse1 .cse19) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))) (let ((.cse24 (store .cse22 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse22 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ .cse23 1))))) (let ((.cse25 (mod (select .cse24 .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse24) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse24 .cse1 .cse25) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= 0 .cse25)))) (let ((.cse35 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse14))) (let ((.cse36 (select .cse35 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse33 (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse34 (select .cse36 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse32 (select (select (store .cse35 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse36 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse33 .cse34))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse28 (store .cse35 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse36 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse32 .cse33 .cse34))))) (let ((.cse26 (let ((.cse29 (let ((.cse30 (let ((.cse31 (select .cse28 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse31 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse31 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse32 .cse33 .cse34))))) (store .cse30 .cse1 (+ (select (select (store .cse28 |c_ULTIMATE.start_main_~a~0#1.base| .cse30) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse30 .cse1)))))) (store .cse29 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse29 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse28 |c_ULTIMATE.start_main_~a~0#1.base| .cse29) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse27 (mod (select .cse26 .cse1) (+ (select (select (store .cse28 |c_ULTIMATE.start_main_~a~0#1.base| .cse26) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse26 .cse1 .cse27) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse27 0))))))))) (or (and (let ((.cse38 (let ((.cse39 (store .cse40 .cse41 (+ .cse42 .cse43 1)))) (store .cse39 .cse15 (mod (select .cse39 .cse15) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse39) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (or .cse37 (not (= (select .cse38 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= (select .cse38 .cse1) 0))) .cse44) (<= 0 .cse45)) (or (and (let ((.cse46 (let ((.cse48 (store .cse40 .cse41 (+ (- 1) .cse42 (* .cse43 (- 1)))))) (store .cse48 .cse15 (mod (select .cse48 .cse15) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse48) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (or .cse37 (not (= (select .cse46 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (<= 0 .cse47) (= (select .cse46 .cse1) 0))) .cse44) (< .cse45 0))))))))) is different from false [2021-11-25 20:13:36,296 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse50 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse43 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse40 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse41 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse50))) (let ((.cse47 (select .cse40 .cse41)) (.cse45 (+ .cse43 1))) (let ((.cse42 (mod .cse47 .cse45))) (let ((.cse37 (= .cse42 0)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse15 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse50 8)) (.cse0 (store .cse40 .cse41 .cse42)) (.cse22 (store .cse40 .cse41 (+ .cse47 .cse43)))) (let ((.cse23 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse22) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse14 (store .cse40 .cse41 1)) (.cse44 (let ((.cse49 (store .cse0 .cse15 (mod (select .cse0 .cse15) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))))) (or (and (not .cse37) (< .cse47 0)) (= (select .cse49 .cse1) 0) (not (= (select .cse49 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (or (not (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= (select .cse0 .cse1) 0)) (let ((.cse13 (store .cse14 .cse15 1))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse13))) (let ((.cse12 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse9 (select .cse13 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse10 (select (select (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse4 (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9 .cse10))))) (let ((.cse3 (let ((.cse5 (let ((.cse6 (let ((.cse7 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse7 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse8 .cse9 .cse10))))) (store .cse6 .cse1 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse6) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse6 .cse1)))))) (store .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse2 (mod (select .cse3 .cse1) (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (= .cse2 0) (not (= (select (store .cse3 .cse1 .cse2) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))))))))) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse18 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse16 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse17 (mod 3 (+ .cse18 1)))) (and (< (+ |c_ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~#sum~0#1.base|) (= (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse17) (= 2 .cse18) (= (select .cse16 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) .cse17))))) (let ((.cse20 (let ((.cse21 (store .cse22 .cse15 (+ .cse23 (select .cse22 .cse15))))) (store .cse21 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse21 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse21) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse19 (mod (select .cse20 .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse20) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (= .cse19 0) (not (= (select (store .cse20 .cse1 .cse19) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))) (let ((.cse24 (store .cse22 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse22 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ .cse23 1))))) (let ((.cse25 (mod (select .cse24 .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse24) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse24 .cse1 .cse25) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= 0 .cse25)))) (let ((.cse35 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse14))) (let ((.cse36 (select .cse35 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse33 (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse34 (select .cse36 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse32 (select (select (store .cse35 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse36 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse33 .cse34))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse28 (store .cse35 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse36 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse32 .cse33 .cse34))))) (let ((.cse26 (let ((.cse29 (let ((.cse30 (let ((.cse31 (select .cse28 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse31 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse31 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse32 .cse33 .cse34))))) (store .cse30 .cse1 (+ (select (select (store .cse28 |c_ULTIMATE.start_main_~a~0#1.base| .cse30) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse30 .cse1)))))) (store .cse29 |c_ULTIMATE.start_main_~a~0#1.offset| (mod (select .cse29 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select (select (store .cse28 |c_ULTIMATE.start_main_~a~0#1.base| .cse29) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (let ((.cse27 (mod (select .cse26 .cse1) (+ (select (select (store .cse28 |c_ULTIMATE.start_main_~a~0#1.base| .cse26) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))) (or (not (= (select (store .cse26 .cse1 .cse27) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= .cse27 0))))))))) (or (and (let ((.cse38 (let ((.cse39 (store .cse40 .cse41 (+ .cse42 .cse43 1)))) (store .cse39 .cse15 (mod (select .cse39 .cse15) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse39) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (or .cse37 (not (= (select .cse38 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (= (select .cse38 .cse1) 0))) .cse44) (<= 0 .cse45)) (or (and (let ((.cse46 (let ((.cse48 (store .cse40 .cse41 (+ (- 1) .cse42 (* .cse43 (- 1)))))) (store .cse48 .cse15 (mod (select .cse48 .cse15) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse48) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1)))))) (or .cse37 (not (= (select .cse46 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (<= 0 .cse47) (= (select .cse46 .cse1) 0))) .cse44) (< .cse45 0))))))))) is different from true [2021-11-25 20:13:38,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:13:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:40,467 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-11-25 20:13:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 20:13:40,468 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 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 20 [2021-11-25 20:13:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:40,469 INFO L225 Difference]: With dead ends: 47 [2021-11-25 20:13:40,469 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 20:13:40,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 120.9s TimeCoverageRelationStatistics Valid=347, Invalid=1632, Unknown=9, NotChecked=174, Total=2162 [2021-11-25 20:13:40,470 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 164 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 30.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:40,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 31 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 227 Invalid, 3 Unknown, 30 Unchecked, 30.1s Time] [2021-11-25 20:13:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 20:13:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-11-25 20:13:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-25 20:13:40,477 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 20 [2021-11-25 20:13:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:40,477 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-25 20:13:40,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-25 20:13:40,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 20:13:40,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:40,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:40,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:40,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:40,679 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash -105264649, now seen corresponding path program 7 times [2021-11-25 20:13:40,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:40,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351165442] [2021-11-25 20:13:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:40,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:40,699 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:13:40,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788097020] [2021-11-25 20:13:40,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:13:40,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:40,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:40,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:40,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:13:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:40,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-25 20:13:40,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:40,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 20:13:40,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:13:40,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 23 [2021-11-25 20:13:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:13:40,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 20:13:41,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-25 20:13:41,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-25 20:13:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-11-25 20:13:41,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 50 [2021-11-25 20:13:41,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:13:41,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 54 [2021-11-25 20:13:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 53 [2021-11-25 20:13:41,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 78 [2021-11-25 20:13:41,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:13:41,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 52 [2021-11-25 20:13:41,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:41,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-25 20:13:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:41,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:05,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:05,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351165442] [2021-11-25 20:14:05,858 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:14:05,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788097020] [2021-11-25 20:14:05,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788097020] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:05,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954388088] [2021-11-25 20:14:05,860 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:14:05,861 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:05,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:05,861 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:05,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:05,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:05,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:05,945 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:14:05,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 20:14:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:05,972 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:14:05,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:14:05,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:05,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:05,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:06,068 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:14:06,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:14:06,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:14:06,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:06,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 39 [2021-11-25 20:14:06,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:14:06,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:14:06,197 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:14:06,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 20:14:06,259 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:14:06,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:14:06,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:14:06,316 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:14:06,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-25 20:14:06,378 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:14:06,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:14:06,447 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:14:06,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:14:06,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:14:06,594 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-25 20:14:06,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 73 [2021-11-25 20:14:06,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:07,173 INFO L354 Elim1Store]: treesize reduction 69, result has 41.0 percent of original size [2021-11-25 20:14:07,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 211 treesize of output 180 [2021-11-25 20:14:07,728 INFO L354 Elim1Store]: treesize reduction 60, result has 40.0 percent of original size [2021-11-25 20:14:07,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2021-11-25 20:14:07,780 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:09,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2116#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:14:09,169 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:09,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:14:09,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-11-25 20:14:09,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546189535] [2021-11-25 20:14:09,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:09,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 20:14:09,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:09,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 20:14:09,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 20:14:09,172 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 37 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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) [2021-11-25 20:14:47,515 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 155 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:15:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:15,757 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2021-11-25 20:15:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 20:15:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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) Word has length 21 [2021-11-25 20:15:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:15,759 INFO L225 Difference]: With dead ends: 60 [2021-11-25 20:15:15,760 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 20:15:15,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 91.7s TimeCoverageRelationStatistics Valid=243, Invalid=1918, Unknown=1, NotChecked=0, Total=2162 [2021-11-25 20:15:15,761 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:15,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 131 Unchecked, 0.2s Time] [2021-11-25 20:15:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 20:15:15,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-11-25 20:15:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:15:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-11-25 20:15:15,776 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 21 [2021-11-25 20:15:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:15,776 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-11-25 20:15:15,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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) [2021-11-25 20:15:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-11-25 20:15:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 20:15:15,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:15,778 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:15,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-25 20:15:15,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:15:15,992 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:15,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:15,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1837045100, now seen corresponding path program 8 times [2021-11-25 20:15:15,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:15,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934544610] [2021-11-25 20:15:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:15,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:16,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:15:16,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529738345] [2021-11-25 20:15:16,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:15:16,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:16,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:16,029 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:16,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:15:16,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:15:16,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:16,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:15:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:15:16,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:15:16,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934544610] [2021-11-25 20:15:16,344 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:15:16,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529738345] [2021-11-25 20:15:16,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529738345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:16,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [338190061] [2021-11-25 20:15:16,346 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:15:16,346 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:16,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:16,346 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:16,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:16,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,388 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:15:16,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:15:16,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,478 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:15:16,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:15:16,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:15:16,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-25 20:15:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:16,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:16,725 INFO L354 Elim1Store]: treesize reduction 169, result has 11.5 percent of original size [2021-11-25 20:15:16,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 22 case distinctions, treesize of input 430 treesize of output 419 [2021-11-25 20:15:16,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:15:16,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:16,893 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:15:16,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-25 20:15:16,967 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:15:16,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:15:17,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:17,060 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:15:17,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-25 20:15:17,147 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:15:17,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:15:17,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:17,279 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-25 20:15:17,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 73 [2021-11-25 20:15:17,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:17,452 INFO L354 Elim1Store]: treesize reduction 77, result has 34.2 percent of original size [2021-11-25 20:15:17,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 236 treesize of output 197 [2021-11-25 20:15:18,096 INFO L354 Elim1Store]: treesize reduction 60, result has 40.0 percent of original size [2021-11-25 20:15:18,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2021-11-25 20:15:18,144 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:18,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2485#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:15:18,697 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:18,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:15:18,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-25 20:15:18,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318877000] [2021-11-25 20:15:18,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:18,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 20:15:18,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:18,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 20:15:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:15:18,699 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:15:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:19,063 INFO L93 Difference]: Finished difference Result 113 states and 137 transitions. [2021-11-25 20:15:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:15:19,063 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 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 22 [2021-11-25 20:15:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:19,064 INFO L225 Difference]: With dead ends: 113 [2021-11-25 20:15:19,064 INFO L226 Difference]: Without dead ends: 90 [2021-11-25 20:15:19,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-11-25 20:15:19,065 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 52 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:19,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 93 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:15:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-25 20:15:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 43. [2021-11-25 20:15:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:15:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2021-11-25 20:15:19,077 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 22 [2021-11-25 20:15:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:19,078 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2021-11-25 20:15:19,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:15:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2021-11-25 20:15:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 20:15:19,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:19,079 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:19,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:19,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:19,292 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash -807483306, now seen corresponding path program 9 times [2021-11-25 20:15:19,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:19,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531470007] [2021-11-25 20:15:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:19,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:19,310 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:15:19,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005886196] [2021-11-25 20:15:19,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:15:19,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:19,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:19,317 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:19,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:15:19,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:15:19,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:19,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:15:19,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:15:19,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:15:19,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531470007] [2021-11-25 20:15:19,582 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:15:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005886196] [2021-11-25 20:15:19,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005886196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2034872966] [2021-11-25 20:15:19,584 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:15:19,584 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:19,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:19,585 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:19,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:19,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:19,672 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:15:19,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 20:15:19,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:19,708 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:15:19,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:15:19,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:19,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:19,785 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:15:19,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:15:19,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:15:19,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:19,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 39 [2021-11-25 20:15:19,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:15:19,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:19,900 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:15:19,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 20:15:19,966 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:15:19,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2021-11-25 20:15:19,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:20,010 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:15:20,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2021-11-25 20:15:20,064 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-25 20:15:20,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2021-11-25 20:15:20,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:20,205 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-25 20:15:20,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 73 [2021-11-25 20:15:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:20,424 INFO L354 Elim1Store]: treesize reduction 77, result has 34.2 percent of original size [2021-11-25 20:15:20,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 211 treesize of output 172 [2021-11-25 20:15:20,898 INFO L354 Elim1Store]: treesize reduction 60, result has 40.0 percent of original size [2021-11-25 20:15:20,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2021-11-25 20:15:20,965 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:21,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2923#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:15:21,309 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:21,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:15:21,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-25 20:15:21,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584394075] [2021-11-25 20:15:21,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:21,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:15:21,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:21,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:15:21,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:15:21,310 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:15:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:21,540 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-11-25 20:15:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:15:21,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 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 23 [2021-11-25 20:15:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:21,541 INFO L225 Difference]: With dead ends: 93 [2021-11-25 20:15:21,542 INFO L226 Difference]: Without dead ends: 71 [2021-11-25 20:15:21,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:15:21,543 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:21,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 46 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:15:21,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-25 20:15:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2021-11-25 20:15:21,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:15:21,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-25 20:15:21,561 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 23 [2021-11-25 20:15:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:21,561 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-25 20:15:21,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:15:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-25 20:15:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:15:21,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:21,563 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:21,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:21,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 20:15:21,780 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:21,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:21,781 INFO L85 PathProgramCache]: Analyzing trace with hash -607830675, now seen corresponding path program 2 times [2021-11-25 20:15:21,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:21,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324815188] [2021-11-25 20:15:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:21,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:21,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:15:21,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262737133] [2021-11-25 20:15:21,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:15:21,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:21,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:21,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820fa57d-6a54-4fbf-87c7-f5221cb88ba4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:15:21,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:15:21,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:21,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-25 20:15:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:21,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2021-11-25 20:15:21,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 20:15:22,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 23 [2021-11-25 20:15:22,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:15:22,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 20:15:22,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:22,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 54 [2021-11-25 20:15:22,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-11-25 20:15:22,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,429 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-25 20:15:22,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 64 [2021-11-25 20:15:22,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:22,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2021-11-25 20:15:22,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2021-11-25 20:15:22,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,849 INFO L354 Elim1Store]: treesize reduction 70, result has 40.7 percent of original size [2021-11-25 20:15:22,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 78 [2021-11-25 20:15:23,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:23,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:23,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 80 [2021-11-25 20:15:23,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:23,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 59 treesize of output 41 [2021-11-25 20:15:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:23,405 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-25 20:15:23,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 57 [2021-11-25 20:15:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:23,740 INFO L328 TraceCheckSpWp]: Computing backward predicates...