./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum60.i --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_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/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_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum60.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/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_c293ec3b-2e3b-4f86-879c-82f98fad773c/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 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:57:00,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:57:00,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:57:00,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:57:00,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:57:00,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:57:00,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:57:00,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:57:00,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:57:00,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:57:00,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:57:00,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:57:00,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:57:00,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:57:00,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:57:00,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:57:00,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:57:00,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:57:00,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:57:00,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:57:00,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:57:00,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:57:00,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:57:00,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:57:00,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:57:00,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:57:00,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:57:00,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:57:00,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:57:00,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:57:00,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:57:00,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:57:00,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:57:00,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:57:00,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:57:00,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:57:00,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:57:00,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:57:00,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:57:00,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:57:00,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:57:00,333 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:57:00,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:57:00,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:57:00,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:57:00,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:57:00,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:57:00,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:57:00,401 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:57:00,401 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:57:00,401 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:57:00,402 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:57:00,403 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:57:00,404 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:57:00,404 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:57:00,404 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:57:00,405 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:57:00,405 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:57:00,405 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:57:00,406 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:57:00,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:57:00,409 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:57:00,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:57:00,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:57:00,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:57:00,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:57:00,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:57:00,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:57:00,413 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:57:00,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:57:00,414 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:57:00,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:57:00,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:57:00,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:57:00,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:57:00,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:57:00,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:57:00,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:57:00,417 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:57:00,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:57:00,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:57:00,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:57:00,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:57:00,419 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_c293ec3b-2e3b-4f86-879c-82f98fad773c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 [2021-11-25 18:57:00,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:57:00,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:57:00,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:57:00,847 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:57:00,848 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:57:00,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/reducercommutativity/rangesum60.i [2021-11-25 18:57:00,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/data/501f97b42/8b63957095c94b7da862380cd7455856/FLAG0710c1d8f [2021-11-25 18:57:01,540 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:57:01,541 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/sv-benchmarks/c/reducercommutativity/rangesum60.i [2021-11-25 18:57:01,555 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/data/501f97b42/8b63957095c94b7da862380cd7455856/FLAG0710c1d8f [2021-11-25 18:57:01,904 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/data/501f97b42/8b63957095c94b7da862380cd7455856 [2021-11-25 18:57:01,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:57:01,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:57:01,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:57:01,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:57:01,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:57:01,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:57:01" (1/1) ... [2021-11-25 18:57:01,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5242df0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:01, skipping insertion in model container [2021-11-25 18:57:01,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:57:01" (1/1) ... [2021-11-25 18:57:01,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:57:01,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:57:02,202 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_c293ec3b-2e3b-4f86-879c-82f98fad773c/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2021-11-25 18:57:02,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:57:02,216 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:57:02,242 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_c293ec3b-2e3b-4f86-879c-82f98fad773c/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2021-11-25 18:57:02,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:57:02,260 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:57:02,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02 WrapperNode [2021-11-25 18:57:02,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:57:02,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:57:02,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:57:02,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:57:02,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02" (1/1) ... [2021-11-25 18:57:02,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02" (1/1) ... [2021-11-25 18:57:02,318 INFO L137 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-11-25 18:57:02,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:57:02,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:57:02,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:57:02,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:57:02,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02" (1/1) ... [2021-11-25 18:57:02,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02" (1/1) ... [2021-11-25 18:57:02,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02" (1/1) ... [2021-11-25 18:57:02,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02" (1/1) ... [2021-11-25 18:57:02,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02" (1/1) ... [2021-11-25 18:57:02,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02" (1/1) ... [2021-11-25 18:57:02,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02" (1/1) ... [2021-11-25 18:57:02,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:57:02,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:57:02,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:57:02,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:57:02,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02" (1/1) ... [2021-11-25 18:57:02,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:57:02,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:02,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:57:02,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:57:02,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:57:02,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:57:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:57:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:57:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:57:02,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:57:02,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:57:02,473 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2021-11-25 18:57:02,473 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2021-11-25 18:57:02,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:57:02,552 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:57:02,555 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:57:02,728 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:57:02,781 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:57:02,781 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 18:57:02,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:57:02 BoogieIcfgContainer [2021-11-25 18:57:02,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:57:02,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:57:02,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:57:02,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:57:02,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:57:01" (1/3) ... [2021-11-25 18:57:02,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60741a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:57:02, skipping insertion in model container [2021-11-25 18:57:02,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:02" (2/3) ... [2021-11-25 18:57:02,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60741a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:57:02, skipping insertion in model container [2021-11-25 18:57:02,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:57:02" (3/3) ... [2021-11-25 18:57:02,793 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2021-11-25 18:57:02,799 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:57:02,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:57:02,854 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:57:02,863 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 18:57:02,864 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:57:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:57:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:57:02,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:02,894 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:02,895 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:02,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:02,903 INFO L85 PathProgramCache]: Analyzing trace with hash -362891911, now seen corresponding path program 1 times [2021-11-25 18:57:02,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:02,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37451853] [2021-11-25 18:57:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:02,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:03,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:03,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37451853] [2021-11-25 18:57:03,153 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-25 18:57:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558637870] [2021-11-25 18:57:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:03,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:03,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:03,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:03,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:57:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:03,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:57:03,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:57:03,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:03,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558637870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:03,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:03,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:57:03,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145636829] [2021-11-25 18:57:03,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:03,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:03,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:03,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:03,549 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:57:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:03,631 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-25 18:57:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:03,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-11-25 18:57:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:03,653 INFO L225 Difference]: With dead ends: 33 [2021-11-25 18:57:03,653 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 18:57:03,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 18:57:03,670 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:03,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:57:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 18:57:03,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 18:57:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:57:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-25 18:57:03,747 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2021-11-25 18:57:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:03,748 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-25 18:57:03,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:57:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-25 18:57:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 18:57:03,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:03,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:03,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:03,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:03,968 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:03,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1234920756, now seen corresponding path program 1 times [2021-11-25 18:57:03,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:03,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418183133] [2021-11-25 18:57:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:03,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:04,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:04,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418183133] [2021-11-25 18:57:04,023 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-25 18:57:04,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788063366] [2021-11-25 18:57:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:04,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:04,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:04,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:04,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:57:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:04,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:57:04,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:57:04,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:04,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788063366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:04,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:04,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:57:04,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095017969] [2021-11-25 18:57:04,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:04,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:04,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:04,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:04,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:04,243 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:57:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:04,270 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-11-25 18:57:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:04,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-25 18:57:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:04,272 INFO L225 Difference]: With dead ends: 29 [2021-11-25 18:57:04,272 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 18:57:04,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 18:57:04,275 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:04,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:57:04,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 18:57:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 18:57:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:57:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-25 18:57:04,283 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2021-11-25 18:57:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:04,284 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-25 18:57:04,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:57:04,285 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-25 18:57:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:57:04,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:04,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:04,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:04,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 18:57:04,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:04,497 INFO L85 PathProgramCache]: Analyzing trace with hash -877476800, now seen corresponding path program 1 times [2021-11-25 18:57:04,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:04,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70604112] [2021-11-25 18:57:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:04,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:04,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:04,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70604112] [2021-11-25 18:57:04,543 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-25 18:57:04,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611001559] [2021-11-25 18:57:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:04,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:04,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:04,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:04,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:57:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:04,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:57:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:57:04,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:04,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611001559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:04,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:04,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:57:04,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570744204] [2021-11-25 18:57:04,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:04,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:04,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:04,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:04,711 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:57:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:04,734 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-25 18:57:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:04,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-25 18:57:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:04,736 INFO L225 Difference]: With dead ends: 27 [2021-11-25 18:57:04,737 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 18:57:04,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 18:57:04,739 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:04,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:57:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 18:57:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 18:57:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:57:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-25 18:57:04,747 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2021-11-25 18:57:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:04,748 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-25 18:57:04,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:57:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-25 18:57:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:57:04,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:04,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:04,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:04,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:04,976 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:04,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:04,977 INFO L85 PathProgramCache]: Analyzing trace with hash 140313158, now seen corresponding path program 1 times [2021-11-25 18:57:04,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:04,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618196999] [2021-11-25 18:57:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:04,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:05,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618196999] [2021-11-25 18:57:05,048 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-25 18:57:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375928605] [2021-11-25 18:57:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:05,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:05,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:05,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:05,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:57:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:05,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:57:05,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:57:05,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:57:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:57:05,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375928605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:57:05,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1407131259] [2021-11-25 18:57:05,454 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:57:05,454 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:57:05,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:57:05,477 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:57:05,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:57:05,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:05,629 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:57:05,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 18:57:05,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:05,693 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:57:05,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:57:05,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:05,780 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 31 treesize of output 33 [2021-11-25 18:57:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:06,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:06,053 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:57:06,056 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 3 case distinctions, treesize of input 224 treesize of output 212 [2021-11-25 18:57:06,238 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 18:57:06,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:06,779 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 30 treesize of output 20 [2021-11-25 18:57:07,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:07,268 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 25 treesize of output 20 [2021-11-25 18:57:07,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:07,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:07,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:07,370 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-25 18:57:07,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-25 18:57:07,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:07,455 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 24 [2021-11-25 18:57:07,477 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 13 treesize of output 9 [2021-11-25 18:57:07,984 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:57:08,180 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:57:12,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '576#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_5 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_5) (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_5 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_5 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_5 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_5 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_5 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_5 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) 4294967296) (+ (- 4294967296) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_5 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_5 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) 4294967296))))))))) (= |#NULL.base| 0))' at error location [2021-11-25 18:57:12,904 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:57:12,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:57:12,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-11-25 18:57:12,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526545334] [2021-11-25 18:57:12,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:57:12,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:57:12,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:12,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:57:12,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:57:12,908 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:57:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:12,959 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-25 18:57:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:57:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2021-11-25 18:57:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:12,961 INFO L225 Difference]: With dead ends: 36 [2021-11-25 18:57:12,961 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 18:57:12,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:57:12,964 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:12,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:57:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 18:57:12,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 18:57:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:57:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-25 18:57:12,971 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2021-11-25 18:57:12,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:12,972 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-25 18:57:12,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:57:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-25 18:57:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:57:12,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:12,974 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:13,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:13,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:13,196 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:13,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 139189043, now seen corresponding path program 2 times [2021-11-25 18:57:13,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:13,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703713894] [2021-11-25 18:57:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:13,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:13,250 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:57:13,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885194819] [2021-11-25 18:57:13,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:57:13,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:13,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:13,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:13,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:57:13,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:57:13,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:57:13,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:57:13,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 18:57:13,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:57:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 18:57:13,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703713894] [2021-11-25 18:57:13,506 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:57:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885194819] [2021-11-25 18:57:13,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885194819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:57:13,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1729218231] [2021-11-25 18:57:13,514 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:57:13,514 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:57:13,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:57:13,516 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:57:13,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:57:13,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:13,568 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:57:13,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 18:57:13,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:13,602 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:57:13,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:57:13,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:13,640 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 26 treesize of output 28 [2021-11-25 18:57:13,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:13,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:13,769 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:57:13,772 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 4 case distinctions, treesize of input 214 treesize of output 213 [2021-11-25 18:57:13,943 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 18:57:14,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:14,243 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 30 treesize of output 20 [2021-11-25 18:57:14,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:14,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:14,597 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 32 treesize of output 27 [2021-11-25 18:57:14,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:14,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:14,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:14,664 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 18:57:14,665 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 80 treesize of output 72 [2021-11-25 18:57:14,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:14,708 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 24 [2021-11-25 18:57:14,731 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 13 treesize of output 9 [2021-11-25 18:57:15,127 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:57:15,357 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:57:23,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '848#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:57:23,011 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:57:23,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:57:23,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-25 18:57:23,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966204675] [2021-11-25 18:57:23,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:57:23,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:57:23,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:23,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:57:23,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=267, Unknown=1, NotChecked=0, Total=342 [2021-11-25 18:57:23,014 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:57:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:23,067 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-11-25 18:57:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:57:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-25 18:57:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:23,069 INFO L225 Difference]: With dead ends: 38 [2021-11-25 18:57:23,069 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 18:57:23,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=74, Invalid=267, Unknown=1, NotChecked=0, Total=342 [2021-11-25 18:57:23,071 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:23,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:57:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 18:57:23,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 18:57:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:57:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-25 18:57:23,086 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2021-11-25 18:57:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:23,088 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-25 18:57:23,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:57:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-25 18:57:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 18:57:23,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:23,091 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:23,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:23,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:23,316 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:23,316 INFO L85 PathProgramCache]: Analyzing trace with hash 378555129, now seen corresponding path program 3 times [2021-11-25 18:57:23,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:23,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379471333] [2021-11-25 18:57:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:23,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:23,368 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:57:23,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670380971] [2021-11-25 18:57:23,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:57:23,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:23,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:23,386 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:23,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:57:23,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:57:23,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:57:23,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:57:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-25 18:57:23,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:57:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-25 18:57:23,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:23,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379471333] [2021-11-25 18:57:23,725 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:57:23,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670380971] [2021-11-25 18:57:23,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670380971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:57:23,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545563026] [2021-11-25 18:57:23,728 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:57:23,728 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:57:23,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:57:23,729 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:57:23,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:57:23,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:23,774 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:57:23,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:57:23,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:23,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:57:23,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:23,814 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 31 treesize of output 33 [2021-11-25 18:57:23,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:23,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:23,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:23,896 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:57:23,897 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 3 case distinctions, treesize of input 224 treesize of output 212 [2021-11-25 18:57:23,952 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 18:57:24,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:24,189 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 30 treesize of output 20 [2021-11-25 18:57:24,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:24,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:24,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:24,475 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 32 treesize of output 27 [2021-11-25 18:57:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:24,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:24,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:24,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:24,551 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 18:57:24,552 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 80 treesize of output 72 [2021-11-25 18:57:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:24,595 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 24 [2021-11-25 18:57:24,611 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 13 treesize of output 9 [2021-11-25 18:57:24,995 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:57:25,206 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:57:31,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1190#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:57:31,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:57:31,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:57:31,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-25 18:57:31,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621874489] [2021-11-25 18:57:31,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:57:31,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:57:31,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:31,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:57:31,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:57:31,910 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:57:31,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:31,950 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-11-25 18:57:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:57:31,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 37 [2021-11-25 18:57:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:31,952 INFO L225 Difference]: With dead ends: 48 [2021-11-25 18:57:31,952 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 18:57:31,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:57:31,954 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:31,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:57:31,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 18:57:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-25 18:57:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:57:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-25 18:57:31,961 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 37 [2021-11-25 18:57:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:31,962 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-25 18:57:31,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:57:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-25 18:57:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 18:57:31,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:31,964 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:31,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:32,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:57:32,184 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:32,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:32,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1272494041, now seen corresponding path program 4 times [2021-11-25 18:57:32,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:32,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307645363] [2021-11-25 18:57:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:32,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:32,267 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:57:32,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671372774] [2021-11-25 18:57:32,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:57:32,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:32,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:32,280 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:32,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:57:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:32,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:57:32,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-25 18:57:32,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:57:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-25 18:57:32,933 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:32,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307645363] [2021-11-25 18:57:32,934 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:57:32,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671372774] [2021-11-25 18:57:32,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671372774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:57:32,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [563494638] [2021-11-25 18:57:32,937 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:57:32,937 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:57:32,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:57:32,938 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:57:32,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:57:32,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:32,993 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:57:32,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:57:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:33,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:57:33,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:33,052 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 26 treesize of output 28 [2021-11-25 18:57:33,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:33,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:33,154 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:57:33,155 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 4 case distinctions, treesize of input 214 treesize of output 213 [2021-11-25 18:57:33,252 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 18:57:33,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:33,516 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 30 treesize of output 20 [2021-11-25 18:57:33,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:33,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:33,818 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 32 treesize of output 27 [2021-11-25 18:57:33,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:33,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:33,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:33,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:33,880 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 18:57:33,881 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 80 treesize of output 72 [2021-11-25 18:57:33,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:33,923 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 24 [2021-11-25 18:57:33,949 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 13 treesize of output 9 [2021-11-25 18:57:34,350 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:57:34,499 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:57:40,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1612#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_24 Int)) (and (or (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_24 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_24 0) (not (= 0 (mod v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_24 0) (not (= 0 (mod v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_24 0) (not (= 0 (mod v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) 4294967296) (- 4294967296)))))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_24))) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:57:40,344 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:57:40,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:57:40,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-11-25 18:57:40,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341611048] [2021-11-25 18:57:40,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:57:40,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:57:40,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:40,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:57:40,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:57:40,347 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:57:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:40,438 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2021-11-25 18:57:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:57:40,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2021-11-25 18:57:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:40,440 INFO L225 Difference]: With dead ends: 60 [2021-11-25 18:57:40,440 INFO L226 Difference]: Without dead ends: 42 [2021-11-25 18:57:40,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:57:40,443 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:40,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:57:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-25 18:57:40,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-25 18:57:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:57:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-25 18:57:40,453 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 43 [2021-11-25 18:57:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:40,460 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-25 18:57:40,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:57:40,460 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-25 18:57:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 18:57:40,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:40,468 INFO L514 BasicCegarLoop]: trace histogram [22, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:40,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:40,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 18:57:40,696 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:40,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1480595865, now seen corresponding path program 5 times [2021-11-25 18:57:40,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:40,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843503855] [2021-11-25 18:57:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:40,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:40,794 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:57:40,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349169995] [2021-11-25 18:57:40,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:57:40,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:40,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:40,796 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:40,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:57:40,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:57:40,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:57:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:57:40,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-11-25 18:57:41,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:57:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-25 18:57:41,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843503855] [2021-11-25 18:57:41,102 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:57:41,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349169995] [2021-11-25 18:57:41,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349169995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:57:41,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [129619503] [2021-11-25 18:57:41,108 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:57:41,109 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:57:41,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:57:41,110 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:57:41,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:57:41,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,142 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:57:41,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 18:57:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,168 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:57:41,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:57:41,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,200 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 31 treesize of output 33 [2021-11-25 18:57:41,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,285 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:57:41,286 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 3 case distinctions, treesize of input 224 treesize of output 212 [2021-11-25 18:57:41,350 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 18:57:41,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,604 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 30 treesize of output 20 [2021-11-25 18:57:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:41,931 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 32 treesize of output 27 [2021-11-25 18:57:41,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:41,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:42,012 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 18:57:42,013 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 80 treesize of output 72 [2021-11-25 18:57:42,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:42,055 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 24 [2021-11-25 18:57:42,078 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 13 treesize of output 9 [2021-11-25 18:57:42,435 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:57:42,569 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:57:50,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2136#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:57:50,625 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:57:50,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:57:50,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-25 18:57:50,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090067944] [2021-11-25 18:57:50,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:57:50,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:57:50,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:57:50,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=267, Unknown=1, NotChecked=0, Total=342 [2021-11-25 18:57:50,628 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:57:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:50,699 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-25 18:57:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:57:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2021-11-25 18:57:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:50,701 INFO L225 Difference]: With dead ends: 57 [2021-11-25 18:57:50,701 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 18:57:50,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=74, Invalid=267, Unknown=1, NotChecked=0, Total=342 [2021-11-25 18:57:50,704 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:50,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:57:50,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 18:57:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-25 18:57:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:57:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-25 18:57:50,713 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 55 [2021-11-25 18:57:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:50,714 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-25 18:57:50,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:57:50,714 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-25 18:57:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 18:57:50,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:50,716 INFO L514 BasicCegarLoop]: trace histogram [22, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:50,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:50,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:50,924 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:50,925 INFO L85 PathProgramCache]: Analyzing trace with hash -496280295, now seen corresponding path program 6 times [2021-11-25 18:57:50,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:50,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835942499] [2021-11-25 18:57:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:50,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:50,976 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:57:50,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072672573] [2021-11-25 18:57:50,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:57:50,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:50,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:50,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:50,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:57:51,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:57:51,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:57:51,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:57:51,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-25 18:57:51,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:57:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-25 18:57:52,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:52,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835942499] [2021-11-25 18:57:52,401 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:57:52,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072672573] [2021-11-25 18:57:52,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072672573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:57:52,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [442942893] [2021-11-25 18:57:52,403 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:57:52,403 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:57:52,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:57:52,403 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:57:52,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:57:52,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,449 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:57:52,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:57:52,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:57:52,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,484 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 26 treesize of output 28 [2021-11-25 18:57:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:52,606 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:57:52,607 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 4 case distinctions, treesize of input 214 treesize of output 213 [2021-11-25 18:57:52,719 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 18:57:52,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,930 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 30 treesize of output 20 [2021-11-25 18:57:53,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,242 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 25 treesize of output 20 [2021-11-25 18:57:53,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,325 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-25 18:57:53,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2021-11-25 18:57:53,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,405 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 24 [2021-11-25 18:57:53,427 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 13 treesize of output 9 [2021-11-25 18:57:53,776 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:57:53,985 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:58:05,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2722#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_36 Int)) (and (or (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_36 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_36 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_36 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_36 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_36 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_36 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) 4294967296) (+ (- 4294967296) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_36 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_36 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) 4294967296)))))) (and (= |ULTIMATE.start_main_~ret5~0#1| 0) (= v_rangesum_~cnt~0_BEFORE_RETURN_36 0))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_36))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:58:05,279 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:58:05,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:58:05,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 48 [2021-11-25 18:58:05,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051875040] [2021-11-25 18:58:05,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:58:05,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:58:05,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:58:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:58:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 18:58:05,292 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:58:05,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:58:05,494 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2021-11-25 18:58:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:58:05,495 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2021-11-25 18:58:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:58:05,496 INFO L225 Difference]: With dead ends: 90 [2021-11-25 18:58:05,496 INFO L226 Difference]: Without dead ends: 69 [2021-11-25 18:58:05,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 18:58:05,499 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:58:05,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:58:05,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-25 18:58:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-25 18:58:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:58:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-11-25 18:58:05,510 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 58 [2021-11-25 18:58:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:58:05,511 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-11-25 18:58:05,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:58:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-11-25 18:58:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 18:58:05,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:58:05,514 INFO L514 BasicCegarLoop]: trace histogram [46, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:58:05,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:58:05,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:58:05,728 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:58:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:58:05,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1231407513, now seen corresponding path program 7 times [2021-11-25 18:58:05,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:58:05,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298937207] [2021-11-25 18:58:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:05,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:58:05,840 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:58:05,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741077102] [2021-11-25 18:58:05,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:58:05,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:58:05,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:58:05,850 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:58:05,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:58:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:58:06,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 18:58:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-25 18:58:07,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-25 18:58:08,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:58:08,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298937207] [2021-11-25 18:58:08,297 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:58:08,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741077102] [2021-11-25 18:58:08,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741077102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:08,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [350674444] [2021-11-25 18:58:08,300 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:58:08,301 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:58:08,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:58:08,301 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:58:08,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:58:08,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:08,337 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:58:08,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:58:08,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:08,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:58:08,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:08,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:58:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:08,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:58:08,503 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:58:08,504 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 4 case distinctions, treesize of input 214 treesize of output 213 [2021-11-25 18:58:08,605 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 18:58:08,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:08,858 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 30 treesize of output 20 [2021-11-25 18:58:09,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:09,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:09,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:58:09,114 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 32 treesize of output 27 [2021-11-25 18:58:09,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:09,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:09,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:09,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:09,169 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 18:58:09,170 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 80 treesize of output 72 [2021-11-25 18:58:09,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:09,208 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 24 [2021-11-25 18:58:09,223 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 13 treesize of output 9 [2021-11-25 18:58:09,695 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:58:09,869 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:58:19,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3578#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_41 Int)) (and (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_41 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_41 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_41 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_41 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_41 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_41 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_41 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) 4294967296) (+ (- 4294967296) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_41 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_41 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) 4294967296))))))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_41))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:58:19,238 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:58:19,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:58:19,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49] total 62 [2021-11-25 18:58:19,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943555484] [2021-11-25 18:58:19,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:58:19,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-25 18:58:19,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:58:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-25 18:58:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=3599, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 18:58:19,245 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:58:19,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:58:19,475 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2021-11-25 18:58:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-25 18:58:19,476 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 82 [2021-11-25 18:58:19,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:58:19,477 INFO L225 Difference]: With dead ends: 104 [2021-11-25 18:58:19,477 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 18:58:19,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1951, Invalid=3599, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 18:58:19,481 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:58:19,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:58:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 18:58:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-25 18:58:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:58:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-11-25 18:58:19,493 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 82 [2021-11-25 18:58:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:58:19,493 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-11-25 18:58:19,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:58:19,494 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-11-25 18:58:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 18:58:19,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:58:19,496 INFO L514 BasicCegarLoop]: trace histogram [60, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:58:19,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:58:19,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:58:19,724 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:58:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:58:19,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1162355257, now seen corresponding path program 8 times [2021-11-25 18:58:19,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:58:19,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040215615] [2021-11-25 18:58:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:19,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:58:19,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:58:19,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301878418] [2021-11-25 18:58:19,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:58:19,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:58:19,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:58:19,838 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:58:19,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:58:20,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:58:20,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:58:20,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:58:20,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 1889 trivial. 0 not checked. [2021-11-25 18:58:20,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 1889 trivial. 0 not checked. [2021-11-25 18:58:20,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:58:20,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040215615] [2021-11-25 18:58:20,482 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:58:20,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301878418] [2021-11-25 18:58:20,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301878418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:20,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1544233286] [2021-11-25 18:58:20,485 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:58:20,485 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:58:20,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:58:20,486 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:58:20,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:58:20,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:20,521 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:58:20,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:58:20,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:20,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:58:20,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:20,563 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 26 treesize of output 28 [2021-11-25 18:58:20,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:20,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:58:20,663 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:58:20,664 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 4 case distinctions, treesize of input 214 treesize of output 213 [2021-11-25 18:58:20,793 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 18:58:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:21,012 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 30 treesize of output 20 [2021-11-25 18:58:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:21,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:21,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:58:21,375 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 32 treesize of output 27 [2021-11-25 18:58:21,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:21,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:21,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:21,432 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 18:58:21,433 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 80 treesize of output 72 [2021-11-25 18:58:21,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:21,468 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 24 [2021-11-25 18:58:21,486 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 13 treesize of output 9 [2021-11-25 18:58:21,824 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:58:22,025 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:58:27,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4524#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_48 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_48) (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_48 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_48 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_48 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_48 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_48 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_48 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_48 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_48 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_48 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) 4294967296) (- 4294967296))))))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:58:27,452 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:58:27,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:58:27,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-25 18:58:27,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574107836] [2021-11-25 18:58:27,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:58:27,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:58:27,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:58:27,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:58:27,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:58:27,454 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:58:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:58:27,509 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2021-11-25 18:58:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:58:27,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 96 [2021-11-25 18:58:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:58:27,512 INFO L225 Difference]: With dead ends: 109 [2021-11-25 18:58:27,512 INFO L226 Difference]: Without dead ends: 89 [2021-11-25 18:58:27,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:58:27,513 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:58:27,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:58:27,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-25 18:58:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-25 18:58:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:58:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-11-25 18:58:27,525 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 96 [2021-11-25 18:58:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:58:27,525 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-11-25 18:58:27,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:58:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-11-25 18:58:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-25 18:58:27,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:58:27,528 INFO L514 BasicCegarLoop]: trace histogram [60, 30, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:58:27,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:58:27,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 18:58:27,744 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:58:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:58:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash 340856441, now seen corresponding path program 9 times [2021-11-25 18:58:27,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:58:27,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207391367] [2021-11-25 18:58:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:27,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:58:27,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:58:27,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075443193] [2021-11-25 18:58:27,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:58:27,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:58:27,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:58:27,849 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:58:27,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:58:28,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:58:28,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:58:28,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:58:28,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 2075 trivial. 0 not checked. [2021-11-25 18:58:28,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 2075 trivial. 0 not checked. [2021-11-25 18:58:28,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:58:28,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207391367] [2021-11-25 18:58:28,726 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:58:28,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075443193] [2021-11-25 18:58:28,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075443193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:28,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1843194567] [2021-11-25 18:58:28,729 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:58:28,729 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:58:28,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:58:28,730 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:58:28,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:58:28,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:28,762 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:58:28,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:58:28,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:28,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:58:28,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:28,806 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 26 treesize of output 28 [2021-11-25 18:58:28,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:28,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:58:28,899 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:58:28,900 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 4 case distinctions, treesize of input 214 treesize of output 213 [2021-11-25 18:58:29,030 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 18:58:29,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:29,283 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 30 treesize of output 20 [2021-11-25 18:58:29,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:29,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:29,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:58:29,586 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 32 treesize of output 27 [2021-11-25 18:58:29,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:29,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:29,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:29,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:29,647 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 18:58:29,648 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 80 treesize of output 72 [2021-11-25 18:58:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:29,673 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 24 [2021-11-25 18:58:29,691 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 13 treesize of output 9 [2021-11-25 18:58:30,003 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:58:30,148 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:58:35,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5612#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_53 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_53) (or (and (exists ((v_rangesum_~ret~0_BEFORE_RETURN_53 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_53 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_53 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_53 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_53 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_53 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_53 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) 4294967296) (- 4294967296))))) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_53 0))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_53 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:58:35,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:58:35,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:58:35,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-25 18:58:35,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325112008] [2021-11-25 18:58:35,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:58:35,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:58:35,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:58:35,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:58:35,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:58:35,481 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:58:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:58:35,614 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2021-11-25 18:58:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:58:35,615 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 114 [2021-11-25 18:58:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:58:35,616 INFO L225 Difference]: With dead ends: 127 [2021-11-25 18:58:35,616 INFO L226 Difference]: Without dead ends: 101 [2021-11-25 18:58:35,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:58:35,618 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:58:35,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:58:35,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-25 18:58:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-11-25 18:58:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:58:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-11-25 18:58:35,648 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 114 [2021-11-25 18:58:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:58:35,650 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-11-25 18:58:35,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:58:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-11-25 18:58:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-25 18:58:35,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:58:35,657 INFO L514 BasicCegarLoop]: trace histogram [66, 60, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:58:35,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:58:35,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:58:35,884 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:58:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:58:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash -284788999, now seen corresponding path program 10 times [2021-11-25 18:58:35,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:58:35,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042898562] [2021-11-25 18:58:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:35,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:58:35,968 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:58:35,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475350320] [2021-11-25 18:58:35,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:58:35,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:58:35,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:58:35,970 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:58:35,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:58:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:58:36,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:58:36,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4192 backedges. 1060 proven. 253 refuted. 0 times theorem prover too weak. 2879 trivial. 0 not checked. [2021-11-25 18:58:36,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4192 backedges. 0 proven. 1313 refuted. 0 times theorem prover too weak. 2879 trivial. 0 not checked. [2021-11-25 18:58:37,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:58:37,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042898562] [2021-11-25 18:58:37,837 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:58:37,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475350320] [2021-11-25 18:58:37,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475350320] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:37,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518091292] [2021-11-25 18:58:37,839 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:58:37,840 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:58:37,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:58:37,840 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:58:37,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:58:37,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:37,874 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:58:37,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:58:37,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:37,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:58:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:37,904 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 26 treesize of output 28 [2021-11-25 18:58:37,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:37,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:58:38,025 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:58:38,025 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 4 case distinctions, treesize of input 214 treesize of output 213 [2021-11-25 18:58:38,144 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 18:58:38,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:38,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 18:58:38,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:38,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:38,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:58:38,635 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 32 treesize of output 27 [2021-11-25 18:58:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:38,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:38,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:38,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:38,683 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 18:58:38,684 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 80 treesize of output 72 [2021-11-25 18:58:38,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:38,733 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 24 [2021-11-25 18:58:38,751 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 13 treesize of output 9 [2021-11-25 18:58:39,069 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:58:39,256 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:58:49,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7000#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_59 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_59) (or (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_59 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_59 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_59 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_59 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_59 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_59 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) 4294967296) (+ (- 4294967296) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_59 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_59 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) 4294967296)))))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_59 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:58:49,132 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:58:49,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:58:49,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-11-25 18:58:49,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984489708] [2021-11-25 18:58:49,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:58:49,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:58:49,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:58:49,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:58:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 18:58:49,136 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 48 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:58:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:58:49,308 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2021-11-25 18:58:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:58:49,309 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 150 [2021-11-25 18:58:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:58:49,311 INFO L225 Difference]: With dead ends: 163 [2021-11-25 18:58:49,311 INFO L226 Difference]: Without dead ends: 125 [2021-11-25 18:58:49,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 18:58:49,314 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:58:49,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:58:49,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-25 18:58:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-25 18:58:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:58:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2021-11-25 18:58:49,329 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 150 [2021-11-25 18:58:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:58:49,329 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2021-11-25 18:58:49,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:58:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2021-11-25 18:58:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-25 18:58:49,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:58:49,334 INFO L514 BasicCegarLoop]: trace histogram [138, 60, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:58:49,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:58:49,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:58:49,544 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:58:49,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:58:49,545 INFO L85 PathProgramCache]: Analyzing trace with hash 628066297, now seen corresponding path program 11 times [2021-11-25 18:58:49,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:58:49,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339643062] [2021-11-25 18:58:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:49,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:58:49,681 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:58:49,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749176378] [2021-11-25 18:58:49,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:58:49,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:58:49,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:58:49,685 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:58:49,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:58:50,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 18:58:50,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:58:50,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:58:50,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11716 backedges. 4422 proven. 10 refuted. 0 times theorem prover too weak. 7284 trivial. 0 not checked. [2021-11-25 18:58:50,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11716 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11706 trivial. 0 not checked. [2021-11-25 18:58:50,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:58:50,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339643062] [2021-11-25 18:58:50,862 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:58:50,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749176378] [2021-11-25 18:58:50,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749176378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:50,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542247008] [2021-11-25 18:58:50,870 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:58:50,870 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:58:50,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:58:50,871 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:58:50,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:58:50,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:50,913 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:58:50,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:58:50,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:50,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:58:50,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:50,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 18:58:51,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:51,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:51,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:51,027 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:58:51,028 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 3 case distinctions, treesize of input 224 treesize of output 212 [2021-11-25 18:58:51,078 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 18:58:51,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:51,322 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 30 treesize of output 20 [2021-11-25 18:58:51,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:51,563 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 25 treesize of output 20 [2021-11-25 18:58:51,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:51,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:51,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:51,659 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-25 18:58:51,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-25 18:58:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:51,732 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 24 [2021-11-25 18:58:51,746 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 13 treesize of output 9 [2021-11-25 18:58:52,110 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:58:52,244 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:58:59,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8904#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_65 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_65) (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_65 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (exists ((v_rangesum_~ret~0_BEFORE_RETURN_65 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_65 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_65 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_65 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_65 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_65 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_65 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) 4294967296) (- 4294967296))))) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_65 0)))))) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:58:59,875 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:58:59,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:58:59,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-25 18:58:59,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317192345] [2021-11-25 18:58:59,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:58:59,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:58:59,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:58:59,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:58:59,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:58:59,878 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:58:59,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:58:59,913 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2021-11-25 18:58:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:58:59,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 222 [2021-11-25 18:58:59,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:58:59,915 INFO L225 Difference]: With dead ends: 185 [2021-11-25 18:58:59,915 INFO L226 Difference]: Without dead ends: 131 [2021-11-25 18:58:59,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 641 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:58:59,917 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:58:59,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:58:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-25 18:58:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-25 18:58:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:58:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2021-11-25 18:58:59,928 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 222 [2021-11-25 18:58:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:58:59,929 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2021-11-25 18:58:59,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:58:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2021-11-25 18:58:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-25 18:58:59,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:58:59,933 INFO L514 BasicCegarLoop]: trace histogram [138, 60, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:58:59,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:00,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:59:00,156 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:00,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:00,157 INFO L85 PathProgramCache]: Analyzing trace with hash -616382471, now seen corresponding path program 12 times [2021-11-25 18:59:00,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:00,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895404401] [2021-11-25 18:59:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:00,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:00,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:59:00,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065203194] [2021-11-25 18:59:00,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:59:00,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:59:00,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:59:00,303 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:59:00,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:59:00,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:59:00,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:59:00,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 18:59:00,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11761 backedges. 4420 proven. 1081 refuted. 0 times theorem prover too weak. 6260 trivial. 0 not checked. [2021-11-25 18:59:02,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:59:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11761 backedges. 0 proven. 5501 refuted. 0 times theorem prover too weak. 6260 trivial. 0 not checked. [2021-11-25 18:59:03,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:03,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895404401] [2021-11-25 18:59:03,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:59:03,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065203194] [2021-11-25 18:59:03,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065203194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:59:03,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1393796067] [2021-11-25 18:59:03,306 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:59:03,307 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:59:03,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:59:03,307 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:59:03,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:59:03,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:03,352 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:59:03,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 18:59:03,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:03,378 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:59:03,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:59:03,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:03,412 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 31 treesize of output 33 [2021-11-25 18:59:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:03,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:03,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:03,509 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:59:03,510 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 3 case distinctions, treesize of input 224 treesize of output 212 [2021-11-25 18:59:03,565 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 18:59:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:03,793 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 30 treesize of output 20 [2021-11-25 18:59:04,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:04,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:04,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:59:04,122 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 32 treesize of output 27 [2021-11-25 18:59:04,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:04,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:04,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:04,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:04,167 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 18:59:04,168 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 80 treesize of output 72 [2021-11-25 18:59:04,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:04,201 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 24 [2021-11-25 18:59:04,216 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 13 treesize of output 9 [2021-11-25 18:59:04,507 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:59:04,714 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:59:14,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10952#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_71 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_71) (or (and (exists ((v_rangesum_~ret~0_BEFORE_RETURN_71 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_71 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_71 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_71 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_71 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_71 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_71 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) 4294967296) (- 4294967296))))) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_71 0))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_71 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))))) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:59:14,197 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:59:14,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:59:14,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 62 [2021-11-25 18:59:14,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219426940] [2021-11-25 18:59:14,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:59:14,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-25 18:59:14,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:14,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-25 18:59:14,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=3599, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 18:59:14,202 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:59:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:14,374 INFO L93 Difference]: Finished difference Result 213 states and 236 transitions. [2021-11-25 18:59:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-25 18:59:14,375 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 228 [2021-11-25 18:59:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:14,377 INFO L225 Difference]: With dead ends: 213 [2021-11-25 18:59:14,377 INFO L226 Difference]: Without dead ends: 145 [2021-11-25 18:59:14,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 608 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1951, Invalid=3599, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 18:59:14,381 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:14,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:14,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-25 18:59:14,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-25 18:59:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:59:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2021-11-25 18:59:14,394 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 228 [2021-11-25 18:59:14,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:14,395 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2021-11-25 18:59:14,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:59:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2021-11-25 18:59:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-25 18:59:14,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:14,401 INFO L514 BasicCegarLoop]: trace histogram [180, 60, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:14,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-25 18:59:14,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:59:14,616 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:14,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1857566521, now seen corresponding path program 13 times [2021-11-25 18:59:14,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:14,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302260234] [2021-11-25 18:59:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:14,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:14,703 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:59:14,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42829449] [2021-11-25 18:59:14,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:59:14,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:59:14,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:59:14,717 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:59:14,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:59:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:15,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:59:15,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18544 backedges. 7446 proven. 55 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2021-11-25 18:59:15,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:59:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18544 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2021-11-25 18:59:16,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:16,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302260234] [2021-11-25 18:59:16,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:59:16,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42829449] [2021-11-25 18:59:16,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42829449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:59:16,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610223202] [2021-11-25 18:59:16,393 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:59:16,394 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:59:16,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:59:16,395 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:59:16,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:59:16,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:16,435 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:59:16,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:59:16,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:16,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:59:16,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:16,477 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 31 treesize of output 33 [2021-11-25 18:59:16,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:16,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:16,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:16,558 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:59:16,559 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 3 case distinctions, treesize of input 224 treesize of output 212 [2021-11-25 18:59:16,608 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 18:59:16,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:16,832 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 30 treesize of output 20 [2021-11-25 18:59:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:17,154 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 25 treesize of output 20 [2021-11-25 18:59:17,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:17,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:17,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:17,232 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-25 18:59:17,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-25 18:59:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:17,290 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 24 [2021-11-25 18:59:17,302 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 13 treesize of output 9 [2021-11-25 18:59:17,603 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:59:17,709 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:59:25,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13296#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_77 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_77) (or (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_77 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_77 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_77 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_77 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_77 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_77 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) 4294967296) (+ (- 4294967296) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_77 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_77 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) 4294967296)))))) (and (= |ULTIMATE.start_main_~ret5~0#1| 0) (= v_rangesum_~cnt~0_BEFORE_RETURN_77 0))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:59:25,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:59:25,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:59:25,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-25 18:59:25,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097387309] [2021-11-25 18:59:25,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:59:25,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:59:25,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:59:25,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:59:25,960 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:59:26,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:26,047 INFO L93 Difference]: Finished difference Result 225 states and 241 transitions. [2021-11-25 18:59:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:59:26,048 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 270 [2021-11-25 18:59:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:26,051 INFO L225 Difference]: With dead ends: 225 [2021-11-25 18:59:26,051 INFO L226 Difference]: Without dead ends: 157 [2021-11-25 18:59:26,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:59:26,053 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:26,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-25 18:59:26,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-11-25 18:59:26,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:59:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2021-11-25 18:59:26,064 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 270 [2021-11-25 18:59:26,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:26,065 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2021-11-25 18:59:26,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:59:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2021-11-25 18:59:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-25 18:59:26,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:26,069 INFO L514 BasicCegarLoop]: trace histogram [180, 60, 22, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:26,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:26,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:59:26,280 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:26,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:26,281 INFO L85 PathProgramCache]: Analyzing trace with hash -707008711, now seen corresponding path program 14 times [2021-11-25 18:59:26,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:26,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455228190] [2021-11-25 18:59:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:26,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:26,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:59:26,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595123784] [2021-11-25 18:59:26,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:59:26,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:59:26,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:59:26,388 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:59:26,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:59:48,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-25 18:59:48,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:59:48,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:59:48,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18742 backedges. 7446 proven. 253 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2021-11-25 18:59:48,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:59:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18742 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2021-11-25 18:59:50,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:50,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455228190] [2021-11-25 18:59:50,012 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:59:50,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595123784] [2021-11-25 18:59:50,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595123784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:59:50,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109911801] [2021-11-25 18:59:50,015 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:59:50,015 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:59:50,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:59:50,016 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:59:50,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:59:50,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:50,050 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:59:50,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 18:59:50,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:50,086 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:59:50,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:59:50,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:50,113 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 26 treesize of output 28 [2021-11-25 18:59:50,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:50,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:59:50,206 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:59:50,206 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 4 case distinctions, treesize of input 214 treesize of output 213 [2021-11-25 18:59:50,304 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 18:59:50,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:50,503 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 30 treesize of output 20 [2021-11-25 18:59:50,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:50,698 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 25 treesize of output 20 [2021-11-25 18:59:50,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:50,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:50,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:50,762 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-25 18:59:50,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2021-11-25 18:59:50,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:50,808 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 24 [2021-11-25 18:59:50,821 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 13 treesize of output 9 [2021-11-25 18:59:51,113 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 18:59:51,215 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:02,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15786#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_83 Int)) (and (or (and (exists ((v_rangesum_~ret~0_BEFORE_RETURN_83 Int)) (= (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_83 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_83 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_83 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_83 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_83 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_83 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) 4294967296) (- 4294967296))) |ULTIMATE.start_main_~ret5~0#1|)) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_83 0))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_83 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_83))) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:00:02,215 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:02,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:00:02,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-11-25 19:00:02,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934703502] [2021-11-25 19:00:02,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:02,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 19:00:02,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:02,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 19:00:02,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 19:00:02,219 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:00:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:02,320 INFO L93 Difference]: Finished difference Result 249 states and 277 transitions. [2021-11-25 19:00:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 19:00:02,321 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 282 [2021-11-25 19:00:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:02,323 INFO L225 Difference]: With dead ends: 249 [2021-11-25 19:00:02,323 INFO L226 Difference]: Without dead ends: 181 [2021-11-25 19:00:02,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 785 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 19:00:02,325 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:02,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:00:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-25 19:00:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-25 19:00:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:00:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2021-11-25 19:00:02,337 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 282 [2021-11-25 19:00:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:02,338 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2021-11-25 19:00:02,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:00:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2021-11-25 19:00:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-25 19:00:02,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:02,342 INFO L514 BasicCegarLoop]: trace histogram [180, 60, 46, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:02,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:02,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 19:00:02,552 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:00:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:02,552 INFO L85 PathProgramCache]: Analyzing trace with hash -670349511, now seen corresponding path program 15 times [2021-11-25 19:00:02,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:02,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618307150] [2021-11-25 19:00:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:02,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:02,664 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:00:02,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048901271] [2021-11-25 19:00:02,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:00:02,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:02,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:02,668 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:02,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 19:00:03,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:00:03,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:00:03,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1717 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 19:00:03,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19570 backedges. 7446 proven. 1081 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2021-11-25 19:00:04,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 19570 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2021-11-25 19:00:05,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:05,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618307150] [2021-11-25 19:00:05,869 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:00:05,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048901271] [2021-11-25 19:00:05,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048901271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:05,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711633162] [2021-11-25 19:00:05,871 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:00:05,872 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:05,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:05,872 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:05,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:05,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:05,911 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:00:05,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 19:00:05,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:05,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 19:00:05,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:05,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 19:00:05,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:05,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:00:06,017 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 19:00:06,018 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 4 case distinctions, treesize of input 214 treesize of output 213 [2021-11-25 19:00:06,120 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 19:00:06,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:06,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 19:00:06,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:06,607 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 25 treesize of output 20 [2021-11-25 19:00:06,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:06,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:06,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:06,667 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-25 19:00:06,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-25 19:00:06,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:06,729 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 24 [2021-11-25 19:00:06,745 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 13 treesize of output 9 [2021-11-25 19:00:07,071 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-25 19:00:07,195 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:13,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18529#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_90 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_90) (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_90 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_90 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_90 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_90 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_90 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_90 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_90 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_90 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_90 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) 4294967296) (- 4294967296))))))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:00:13,925 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:13,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:00:13,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 61 [2021-11-25 19:00:13,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962463169] [2021-11-25 19:00:13,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:13,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-25 19:00:13,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-25 19:00:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1890, Invalid=3512, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 19:00:13,930 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:00:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:14,108 INFO L93 Difference]: Finished difference Result 262 states and 279 transitions. [2021-11-25 19:00:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-25 19:00:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 306 [2021-11-25 19:00:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:14,111 INFO L225 Difference]: With dead ends: 262 [2021-11-25 19:00:14,112 INFO L226 Difference]: Without dead ends: 194 [2021-11-25 19:00:14,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 843 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1890, Invalid=3512, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 19:00:14,114 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:14,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:00:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-25 19:00:14,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-11-25 19:00:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0158730158730158) internal successors, (192), 189 states have internal predecessors, (192), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:00:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2021-11-25 19:00:14,127 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 306 [2021-11-25 19:00:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:14,128 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2021-11-25 19:00:14,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:00:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2021-11-25 19:00:14,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-25 19:00:14,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:14,132 INFO L514 BasicCegarLoop]: trace histogram [180, 60, 59, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:14,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:14,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 19:00:14,348 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:00:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1919207047, now seen corresponding path program 16 times [2021-11-25 19:00:14,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:14,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874916143] [2021-11-25 19:00:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:14,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:14,455 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:00:14,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355964002] [2021-11-25 19:00:14,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:00:14,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:14,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:14,460 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:14,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c293ec3b-2e3b-4f86-879c-82f98fad773c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process