./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/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_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/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_d4b6cb1d-e292-4b0f-9931-3a727f87a116/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 44b18e123610caaf6237dddd08dfbd765ad919d1168e6261239628431b3c22b1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:36:03,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:36:03,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:36:03,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:36:03,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:36:03,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:36:03,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:36:03,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:36:03,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:36:03,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:36:03,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:36:03,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:36:03,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:36:03,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:36:03,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:36:03,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:36:03,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:36:03,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:36:03,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:36:03,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:36:03,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:36:03,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:36:03,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:36:03,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:36:03,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:36:03,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:36:03,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:36:03,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:36:03,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:36:03,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:36:03,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:36:03,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:36:03,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:36:03,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:36:03,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:36:03,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:36:03,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:36:03,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:36:03,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:36:03,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:36:03,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:36:03,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:36:03,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:36:03,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:36:03,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:36:03,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:36:03,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:36:03,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:36:03,406 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:36:03,406 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:36:03,406 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:36:03,406 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:36:03,407 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:36:03,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:36:03,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:36:03,408 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:36:03,409 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:36:03,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:36:03,409 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:36:03,409 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:36:03,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:36:03,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:36:03,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:36:03,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:36:03,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:36:03,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:36:03,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:36:03,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:36:03,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:36:03,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:36:03,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:36:03,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:36:03,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:36:03,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:36:03,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:36:03,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:36:03,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:36:03,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:36:03,415 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:36:03,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:36:03,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:36:03,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:36:03,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:36:03,416 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_d4b6cb1d-e292-4b0f-9931-3a727f87a116/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44b18e123610caaf6237dddd08dfbd765ad919d1168e6261239628431b3c22b1 [2021-11-25 19:36:03,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:36:03,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:36:03,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:36:03,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:36:03,738 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:36:03,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2021-11-25 19:36:03,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/data/de30a786e/5382526f77e3408cb24ea50d9a2e9465/FLAG521ca9789 [2021-11-25 19:36:04,336 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:36:04,337 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2021-11-25 19:36:04,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/data/de30a786e/5382526f77e3408cb24ea50d9a2e9465/FLAG521ca9789 [2021-11-25 19:36:04,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/data/de30a786e/5382526f77e3408cb24ea50d9a2e9465 [2021-11-25 19:36:04,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:36:04,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:36:04,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:36:04,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:36:04,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:36:04,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:36:04" (1/1) ... [2021-11-25 19:36:04,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789d9f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:04, skipping insertion in model container [2021-11-25 19:36:04,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:36:04" (1/1) ... [2021-11-25 19:36:04,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:36:04,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:36:04,925 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_d4b6cb1d-e292-4b0f-9931-3a727f87a116/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2021-11-25 19:36:04,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:36:04,964 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:36:04,977 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_d4b6cb1d-e292-4b0f-9931-3a727f87a116/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2021-11-25 19:36:04,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:36:05,009 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:36:05,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05 WrapperNode [2021-11-25 19:36:05,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:36:05,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:36:05,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:36:05,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:36:05,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05" (1/1) ... [2021-11-25 19:36:05,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05" (1/1) ... [2021-11-25 19:36:05,049 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2021-11-25 19:36:05,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:36:05,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:36:05,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:36:05,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:36:05,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05" (1/1) ... [2021-11-25 19:36:05,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05" (1/1) ... [2021-11-25 19:36:05,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05" (1/1) ... [2021-11-25 19:36:05,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05" (1/1) ... [2021-11-25 19:36:05,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05" (1/1) ... [2021-11-25 19:36:05,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05" (1/1) ... [2021-11-25 19:36:05,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05" (1/1) ... [2021-11-25 19:36:05,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:36:05,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:36:05,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:36:05,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:36:05,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05" (1/1) ... [2021-11-25 19:36:05,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:36:05,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:05,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:36:05,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:36:05,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:36:05,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:36:05,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:36:05,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:36:05,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:36:05,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:36:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:36:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:36:05,275 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:36:05,277 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:36:05,455 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:36:05,500 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:36:05,500 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 19:36:05,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:36:05 BoogieIcfgContainer [2021-11-25 19:36:05,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:36:05,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:36:05,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:36:05,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:36:05,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:36:04" (1/3) ... [2021-11-25 19:36:05,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b1b763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:36:05, skipping insertion in model container [2021-11-25 19:36:05,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:05" (2/3) ... [2021-11-25 19:36:05,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b1b763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:36:05, skipping insertion in model container [2021-11-25 19:36:05,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:36:05" (3/3) ... [2021-11-25 19:36:05,514 INFO L111 eAbstractionObserver]: Analyzing ICFG init-2-n-u.c [2021-11-25 19:36:05,519 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:36:05,520 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:36:05,586 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:36:05,594 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 19:36:05,594 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:36:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:05,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:36:05,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:05,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:36:05,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:05,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1361640078, now seen corresponding path program 1 times [2021-11-25 19:36:05,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:05,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266192771] [2021-11-25 19:36:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:05,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:05,742 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:36:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435904586] [2021-11-25 19:36:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:05,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:05,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:05,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:05,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:36:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:05,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:36:05,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:05,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:36:05,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:05,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266192771] [2021-11-25 19:36:05,952 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:36:05,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435904586] [2021-11-25 19:36:05,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435904586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:36:05,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:36:05,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:36:05,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298198007] [2021-11-25 19:36:05,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:36:05,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:36:05,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:05,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:36:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:36:06,004 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:06,059 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2021-11-25 19:36:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:36:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 19:36:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:06,077 INFO L225 Difference]: With dead ends: 19 [2021-11-25 19:36:06,077 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 19:36:06,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 19:36:06,086 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 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 19:36:06,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:36:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 19:36:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-11-25 19:36:06,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2021-11-25 19:36:06,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 6 [2021-11-25 19:36:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:06,141 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2021-11-25 19:36:06,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2021-11-25 19:36:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:36:06,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:06,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:06,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:36:06,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:06,369 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:06,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1520320404, now seen corresponding path program 1 times [2021-11-25 19:36:06,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:06,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619227066] [2021-11-25 19:36:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:06,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:06,378 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:36:06,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287999540] [2021-11-25 19:36:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:06,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:06,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:06,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:06,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:36:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:06,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:36:06,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:06,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:36:06,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:06,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619227066] [2021-11-25 19:36:06,488 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:36:06,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287999540] [2021-11-25 19:36:06,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287999540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:36:06,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:36:06,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:36:06,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562000351] [2021-11-25 19:36:06,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:36:06,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:36:06,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:06,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:36:06,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:36:06,491 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:06,547 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-11-25 19:36:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:36:06,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 19:36:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:06,562 INFO L225 Difference]: With dead ends: 25 [2021-11-25 19:36:06,562 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 19:36:06,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:36:06,564 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:06,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:36:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 19:36:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2021-11-25 19:36:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-11-25 19:36:06,570 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2021-11-25 19:36:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:06,571 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-11-25 19:36:06,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-11-25 19:36:06,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:36:06,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:06,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:06,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:36:06,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:06,796 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:06,797 INFO L85 PathProgramCache]: Analyzing trace with hash 69801914, now seen corresponding path program 1 times [2021-11-25 19:36:06,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:06,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187842721] [2021-11-25 19:36:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:06,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:06,816 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:36:06,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943045371] [2021-11-25 19:36:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:06,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:06,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:06,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:06,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:36:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:06,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:36:06,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:06,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:36:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:07,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:07,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187842721] [2021-11-25 19:36:07,057 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:36:07,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943045371] [2021-11-25 19:36:07,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943045371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:36:07,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2067121246] [2021-11-25 19:36:07,090 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:36:07,091 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:36:07,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:36:07,108 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:36:07,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:36:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:07,252 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-25 19:36:07,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2021-11-25 19:36:07,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:07,311 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:36:07,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:36:07,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:07,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:36:07,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:07,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:07,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:07,658 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:36:07,659 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 252 treesize of output 249 [2021-11-25 19:36:07,792 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 21 treesize of output 17 [2021-11-25 19:36:08,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:08,032 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 19:36:08,033 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 1 case distinctions, treesize of input 138 treesize of output 140 [2021-11-25 19:36:08,098 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 21 treesize of output 17 [2021-11-25 19:36:08,167 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 21 treesize of output 17 [2021-11-25 19:36:08,225 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 21 treesize of output 17 [2021-11-25 19:36:08,340 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 17 treesize of output 13 [2021-11-25 19:36:08,381 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 21 treesize of output 17 [2021-11-25 19:36:08,386 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:36:08,777 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '217#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem5#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:36:08,777 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:36:08,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:36:08,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-25 19:36:08,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168026494] [2021-11-25 19:36:08,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:36:08,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:36:08,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:36:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:36:08,780 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:08,863 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-11-25 19:36:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:36:08,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 19:36:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:08,865 INFO L225 Difference]: With dead ends: 41 [2021-11-25 19:36:08,865 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 19:36:08,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:36:08,868 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:08,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 14 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:36:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 19:36:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-11-25 19:36:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-25 19:36:08,876 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 9 [2021-11-25 19:36:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:08,876 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-25 19:36:08,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-25 19:36:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:36:08,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:08,878 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:08,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:36:09,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:09,094 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:09,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash -760866540, now seen corresponding path program 2 times [2021-11-25 19:36:09,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:09,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022163622] [2021-11-25 19:36:09,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:09,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:09,104 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:36:09,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331251285] [2021-11-25 19:36:09,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:36:09,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:09,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:09,120 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:09,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:36:09,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:36:09,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:36:09,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:36:09,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:36:09,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:36:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:36:09,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:09,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022163622] [2021-11-25 19:36:09,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:36:09,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331251285] [2021-11-25 19:36:09,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331251285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:36:09,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1370690843] [2021-11-25 19:36:09,321 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:36:09,325 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:36:09,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:36:09,325 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:36:09,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:36:09,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:09,387 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:36:09,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:36:09,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:09,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 19:36:09,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:09,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 19:36:09,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:09,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:36:09,565 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-25 19:36:09,565 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 248 treesize of output 251 [2021-11-25 19:36:09,649 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 21 treesize of output 17 [2021-11-25 19:36:09,730 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 17 treesize of output 13 [2021-11-25 19:36:09,803 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:36:09,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 85 [2021-11-25 19:36:09,870 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 21 treesize of output 17 [2021-11-25 19:36:09,979 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 21 treesize of output 17 [2021-11-25 19:36:10,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:10,021 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 84 treesize of output 83 [2021-11-25 19:36:10,057 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 21 treesize of output 17 [2021-11-25 19:36:10,063 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:36:10,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '405#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem5#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:36:10,349 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:36:10,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:36:10,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-25 19:36:10,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235064511] [2021-11-25 19:36:10,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:36:10,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:36:10,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:36:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:36:10,351 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:10,394 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-11-25 19:36:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:36:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 19:36:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:10,397 INFO L225 Difference]: With dead ends: 58 [2021-11-25 19:36:10,397 INFO L226 Difference]: Without dead ends: 42 [2021-11-25 19:36:10,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:36:10,399 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:10,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:36:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-25 19:36:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-25 19:36:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-25 19:36:10,408 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 12 [2021-11-25 19:36:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:10,408 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-25 19:36:10,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-25 19:36:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 19:36:10,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:10,410 INFO L514 BasicCegarLoop]: trace histogram [16, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:10,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:36:10,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:10,626 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:10,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash -165459206, now seen corresponding path program 3 times [2021-11-25 19:36:10,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:10,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341811139] [2021-11-25 19:36:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:10,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:10,641 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:36:10,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980152515] [2021-11-25 19:36:10,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:36:10,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:10,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:10,647 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:10,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:36:11,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:36:11,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:36:11,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:36:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-25 19:36:11,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:36:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-25 19:36:11,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:11,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341811139] [2021-11-25 19:36:11,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:36:11,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980152515] [2021-11-25 19:36:11,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980152515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:36:11,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197121363] [2021-11-25 19:36:11,514 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:36:11,515 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:36:11,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:36:11,515 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:36:11,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:36:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:11,564 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:36:11,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:36:11,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:11,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 19:36:11,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:11,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:36:11,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:11,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:11,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:11,707 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:36:11,708 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 252 treesize of output 249 [2021-11-25 19:36:11,772 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 21 treesize of output 17 [2021-11-25 19:36:11,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:11,891 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-25 19:36:11,892 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 1 case distinctions, treesize of input 142 treesize of output 144 [2021-11-25 19:36:11,948 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 21 treesize of output 17 [2021-11-25 19:36:11,984 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 17 treesize of output 13 [2021-11-25 19:36:12,051 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:36:12,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 85 [2021-11-25 19:36:12,109 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 21 treesize of output 17 [2021-11-25 19:36:12,158 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 21 treesize of output 17 [2021-11-25 19:36:12,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:12,191 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 84 treesize of output 83 [2021-11-25 19:36:12,225 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 21 treesize of output 17 [2021-11-25 19:36:12,230 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:36:12,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '778#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem5#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:36:12,449 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:36:12,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:36:12,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-25 19:36:12,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776181738] [2021-11-25 19:36:12,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:36:12,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:36:12,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:36:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:36:12,451 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:12,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:12,651 INFO L93 Difference]: Finished difference Result 138 states and 182 transitions. [2021-11-25 19:36:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:36:12,652 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-25 19:36:12,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:12,653 INFO L225 Difference]: With dead ends: 138 [2021-11-25 19:36:12,654 INFO L226 Difference]: Without dead ends: 103 [2021-11-25 19:36:12,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=326, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:36:12,655 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 148 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:12,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 32 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:36:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-25 19:36:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2021-11-25 19:36:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2021-11-25 19:36:12,669 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 30 [2021-11-25 19:36:12,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:12,670 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2021-11-25 19:36:12,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2021-11-25 19:36:12,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 19:36:12,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:12,672 INFO L514 BasicCegarLoop]: trace histogram [40, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:12,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 19:36:12,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:12,880 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:12,880 INFO L85 PathProgramCache]: Analyzing trace with hash 577256186, now seen corresponding path program 4 times [2021-11-25 19:36:12,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:12,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821782750] [2021-11-25 19:36:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:12,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:12,913 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:36:12,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812994758] [2021-11-25 19:36:12,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:36:12,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:12,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:12,926 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:12,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:36:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:13,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:36:13,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-11-25 19:36:13,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:36:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-11-25 19:36:13,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:13,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821782750] [2021-11-25 19:36:13,593 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:36:13,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812994758] [2021-11-25 19:36:13,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812994758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:36:13,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [548714673] [2021-11-25 19:36:13,595 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:36:13,596 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:36:13,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:36:13,596 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:36:13,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:36:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:13,645 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-25 19:36:13,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2021-11-25 19:36:13,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:13,689 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:36:13,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:36:13,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:13,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:36:13,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:13,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:13,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:13,818 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:36:13,821 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 252 treesize of output 249 [2021-11-25 19:36:13,869 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 21 treesize of output 17 [2021-11-25 19:36:13,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:13,975 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-25 19:36:13,975 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 1 case distinctions, treesize of input 142 treesize of output 144 [2021-11-25 19:36:14,026 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 21 treesize of output 17 [2021-11-25 19:36:14,060 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 17 treesize of output 13 [2021-11-25 19:36:14,118 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:36:14,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 85 [2021-11-25 19:36:14,169 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 21 treesize of output 17 [2021-11-25 19:36:14,215 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 17 treesize of output 13 [2021-11-25 19:36:14,258 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:36:14,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 85 [2021-11-25 19:36:14,318 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 21 treesize of output 17 [2021-11-25 19:36:14,321 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:36:14,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1531#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem5#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:36:14,588 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:36:14,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:36:14,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-25 19:36:14,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096479080] [2021-11-25 19:36:14,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:36:14,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 19:36:14,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:14,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 19:36:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=531, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:36:14,591 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:15,078 INFO L93 Difference]: Finished difference Result 282 states and 362 transitions. [2021-11-25 19:36:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 19:36:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-25 19:36:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:15,081 INFO L225 Difference]: With dead ends: 282 [2021-11-25 19:36:15,081 INFO L226 Difference]: Without dead ends: 211 [2021-11-25 19:36:15,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=718, Invalid=1004, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 19:36:15,083 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 284 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:15,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 68 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:36:15,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-25 19:36:15,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 168. [2021-11-25 19:36:15,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1676646706586826) internal successors, (195), 167 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2021-11-25 19:36:15,126 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 54 [2021-11-25 19:36:15,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:15,127 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2021-11-25 19:36:15,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:36:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2021-11-25 19:36:15,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 19:36:15,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:15,133 INFO L514 BasicCegarLoop]: trace histogram [88, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:15,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:36:15,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:36:15,348 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:15,349 INFO L85 PathProgramCache]: Analyzing trace with hash -139175174, now seen corresponding path program 5 times [2021-11-25 19:36:15,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:15,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110417704] [2021-11-25 19:36:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:15,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:15,380 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:36:15,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256853798] [2021-11-25 19:36:15,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:36:15,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:15,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:15,382 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:15,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:38:14,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-11-25 19:38:14,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:38:14,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 19:38:14,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 1591 proven. 253 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2021-11-25 19:38:14,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 4 proven. 1840 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2021-11-25 19:38:15,705 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:15,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110417704] [2021-11-25 19:38:15,706 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:38:15,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256853798] [2021-11-25 19:38:15,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256853798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:38:15,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574192824] [2021-11-25 19:38:15,708 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:38:15,709 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:38:15,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:38:15,709 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:38:15,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:38:15,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:15,750 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:38:15,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:38:15,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:15,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 19:38:15,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:15,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:38:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:15,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:15,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:15,899 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:38:15,899 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 252 treesize of output 249 [2021-11-25 19:38:15,947 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 21 treesize of output 17 [2021-11-25 19:38:16,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:16,050 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 19:38:16,051 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 1 case distinctions, treesize of input 138 treesize of output 140 [2021-11-25 19:38:16,085 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 21 treesize of output 17 [2021-11-25 19:38:16,120 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 17 treesize of output 13 [2021-11-25 19:38:16,143 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 21 treesize of output 17 [2021-11-25 19:38:16,206 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 17 treesize of output 13 [2021-11-25 19:38:16,234 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 21 treesize of output 17 [2021-11-25 19:38:16,238 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:38:16,512 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3010#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem5#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:38:16,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:38:16,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:38:16,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-25 19:38:16,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312522301] [2021-11-25 19:38:16,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:38:16,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-25 19:38:16,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-25 19:38:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1347, Invalid=1623, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 19:38:16,516 INFO L87 Difference]: Start difference. First operand 168 states and 195 transitions. Second operand has 50 states, 50 states have (on average 1.22) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:38:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:18,012 INFO L93 Difference]: Finished difference Result 570 states and 722 transitions. [2021-11-25 19:38:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 19:38:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.22) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-25 19:38:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:18,016 INFO L225 Difference]: With dead ends: 570 [2021-11-25 19:38:18,016 INFO L226 Difference]: Without dead ends: 427 [2021-11-25 19:38:18,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2566, Invalid=3440, Unknown=0, NotChecked=0, Total=6006 [2021-11-25 19:38:18,023 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 854 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:18,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 140 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:38:18,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-25 19:38:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 336. [2021-11-25 19:38:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.155223880597015) internal successors, (387), 335 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:38:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 387 transitions. [2021-11-25 19:38:18,071 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 387 transitions. Word has length 102 [2021-11-25 19:38:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:18,072 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 387 transitions. [2021-11-25 19:38:18,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.22) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:38:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 387 transitions. [2021-11-25 19:38:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-25 19:38:18,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:18,087 INFO L514 BasicCegarLoop]: trace histogram [184, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:18,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:38:18,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:18,299 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:18,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1831494918, now seen corresponding path program 6 times [2021-11-25 19:38:18,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:18,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6959987] [2021-11-25 19:38:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:18,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:18,347 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:38:18,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470535948] [2021-11-25 19:38:18,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:38:18,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:18,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:18,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:18,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b6cb1d-e292-4b0f-9931-3a727f87a116/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process