./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V --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 6c377c3922cafbc07c158cb252290a97b70e1cbfc6e9de773d7729c460f56857 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:58:23,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:58:23,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:58:23,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:58:23,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:58:23,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:58:23,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:58:23,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:58:23,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:58:23,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:58:23,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:58:23,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:58:23,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:58:23,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:58:23,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:58:23,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:58:23,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:58:23,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:58:23,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:58:23,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:58:23,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:58:23,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:58:23,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:58:23,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:58:23,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:58:23,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:58:23,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:58:23,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:58:23,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:58:23,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:58:23,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:58:23,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:58:23,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:58:23,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:58:23,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:58:23,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:58:23,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:58:23,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:58:23,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:58:23,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:58:23,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:58:23,370 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:58:23,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:58:23,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:58:23,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:58:23,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:58:23,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:58:23,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:58:23,424 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:58:23,424 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:58:23,425 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:58:23,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:58:23,426 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:58:23,427 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:58:23,427 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:58:23,427 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:58:23,428 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:58:23,428 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:58:23,429 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:58:23,429 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:58:23,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:58:23,431 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:58:23,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:58:23,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:58:23,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:58:23,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:58:23,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:58:23,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:58:23,440 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:58:23,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:58:23,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:58:23,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:58:23,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:58:23,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:58:23,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:58:23,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:58:23,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:58:23,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:58:23,444 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:58:23,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:58:23,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:58:23,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:58:23,445 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:58:23,446 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_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c377c3922cafbc07c158cb252290a97b70e1cbfc6e9de773d7729c460f56857 [2021-11-23 02:58:23,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:58:23,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:58:23,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:58:23,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:58:23,746 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:58:23,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-fpi/ifeqn1.c [2021-11-23 02:58:23,828 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/data/44680cff5/ee0dfdab99cb4ab4a5427294a493b965/FLAG0af57f097 [2021-11-23 02:58:24,423 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:58:24,423 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/sv-benchmarks/c/array-fpi/ifeqn1.c [2021-11-23 02:58:24,437 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/data/44680cff5/ee0dfdab99cb4ab4a5427294a493b965/FLAG0af57f097 [2021-11-23 02:58:24,799 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/data/44680cff5/ee0dfdab99cb4ab4a5427294a493b965 [2021-11-23 02:58:24,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:58:24,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:58:24,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:58:24,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:58:24,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:58:24,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:24" (1/1) ... [2021-11-23 02:58:24,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28485420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:24, skipping insertion in model container [2021-11-23 02:58:24,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:24" (1/1) ... [2021-11-23 02:58:24,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:58:24,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:58:25,085 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_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2021-11-23 02:58:25,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:58:25,130 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:58:25,147 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_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2021-11-23 02:58:25,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:58:25,189 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:58:25,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25 WrapperNode [2021-11-23 02:58:25,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:58:25,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:58:25,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:58:25,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:58:25,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25" (1/1) ... [2021-11-23 02:58:25,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25" (1/1) ... [2021-11-23 02:58:25,255 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-23 02:58:25,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:58:25,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:58:25,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:58:25,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:58:25,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25" (1/1) ... [2021-11-23 02:58:25,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25" (1/1) ... [2021-11-23 02:58:25,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25" (1/1) ... [2021-11-23 02:58:25,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25" (1/1) ... [2021-11-23 02:58:25,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25" (1/1) ... [2021-11-23 02:58:25,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25" (1/1) ... [2021-11-23 02:58:25,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25" (1/1) ... [2021-11-23 02:58:25,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:58:25,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:58:25,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:58:25,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:58:25,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25" (1/1) ... [2021-11-23 02:58:25,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:58:25,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:58:25,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:58:25,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:58:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:58:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:58:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:58:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:58:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:58:25,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:58:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:58:25,459 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:58:25,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:58:25,679 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:58:25,808 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:58:25,808 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:58:25,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:25 BoogieIcfgContainer [2021-11-23 02:58:25,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:58:25,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:58:25,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:58:25,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:58:25,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:58:24" (1/3) ... [2021-11-23 02:58:25,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f71b979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:25, skipping insertion in model container [2021-11-23 02:58:25,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:25" (2/3) ... [2021-11-23 02:58:25,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f71b979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:25, skipping insertion in model container [2021-11-23 02:58:25,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:25" (3/3) ... [2021-11-23 02:58:25,822 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn1.c [2021-11-23 02:58:25,828 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:58:25,829 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:58:25,897 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:58:25,906 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 [2021-11-23 02:58:25,908 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:58:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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) [2021-11-23 02:58:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:58:25,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:25,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:25,941 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2021-11-23 02:58:25,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:58:25,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864910750] [2021-11-23 02:58:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:25,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:58:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:58:26,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:58:26,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864910750] [2021-11-23 02:58:26,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864910750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:58:26,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:58:26,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:58:26,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837175134] [2021-11-23 02:58:26,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:58:26,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:58:26,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:58:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:58:26,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:58:26,226 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:26,308 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-11-23 02:58:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:58:26,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:58:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:26,319 INFO L225 Difference]: With dead ends: 20 [2021-11-23 02:58:26,319 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 02:58:26,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:58:26,333 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:26,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:58:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 02:58:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 02:58:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-23 02:58:26,369 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-23 02:58:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:26,370 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-23 02:58:26,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-23 02:58:26,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:58:26,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:26,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:26,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:58:26,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:26,378 INFO L85 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2021-11-23 02:58:26,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:58:26,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938877626] [2021-11-23 02:58:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:26,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:58:26,432 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:58:26,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659906962] [2021-11-23 02:58:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:26,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:58:26,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:58:26,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:58:26,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:58:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:26,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:58:26,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:58:26,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:58:26,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:58:26,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938877626] [2021-11-23 02:58:26,657 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:58:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659906962] [2021-11-23 02:58:26,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659906962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:58:26,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:58:26,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:58:26,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355679495] [2021-11-23 02:58:26,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:58:26,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:58:26,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:58:26,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:58:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:58:26,670 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-23 02:58:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:26,750 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-23 02:58:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:58:26,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-11-23 02:58:26,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:26,754 INFO L225 Difference]: With dead ends: 21 [2021-11-23 02:58:26,754 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 02:58:26,755 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 [2021-11-23 02:58:26,757 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:26,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:58:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 02:58:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-11-23 02:58:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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) [2021-11-23 02:58:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-23 02:58:26,776 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-23 02:58:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:26,776 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-23 02:58:26,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-23 02:58:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-23 02:58:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:58:26,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:26,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:26,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:26,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:58:27,000 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2021-11-23 02:58:27,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:58:27,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511081538] [2021-11-23 02:58:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:27,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:58:27,048 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:58:27,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134701191] [2021-11-23 02:58:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:27,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:58:27,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:58:27,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:58:27,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:58:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:27,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:58:27,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:27,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:58:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:58:27,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:28,958 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-23 02:58:28,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 263 treesize of output 738 [2021-11-23 02:58:29,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:29,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:29,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:29,886 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-23 02:58:29,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 202 treesize of output 202 [2021-11-23 02:58:30,330 INFO L354 Elim1Store]: treesize reduction 244, result has 30.3 percent of original size [2021-11-23 02:58:30,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 836 treesize of output 798 [2021-11-23 02:58:30,599 INFO L354 Elim1Store]: treesize reduction 244, result has 30.3 percent of original size [2021-11-23 02:58:30,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 861 treesize of output 836 [2021-11-23 02:58:30,844 INFO L354 Elim1Store]: treesize reduction 227, result has 34.2 percent of original size [2021-11-23 02:58:30,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 886 treesize of output 889 [2021-11-23 02:58:31,223 INFO L354 Elim1Store]: treesize reduction 179, result has 48.1 percent of original size [2021-11-23 02:58:31,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 868 treesize of output 808 [2021-11-23 02:58:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:58:36,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:58:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511081538] [2021-11-23 02:58:36,564 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:58:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134701191] [2021-11-23 02:58:36,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134701191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:58:36,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886111547] [2021-11-23 02:58:36,584 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 02:58:36,584 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:58:36,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:58:36,600 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:58:36,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:58:36,773 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-23 02:58:36,773 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 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-23 02:58:36,909 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 02:58:36,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 02:58:36,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:58:36,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:58:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:37,080 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-23 02:58:37,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 134 [2021-11-23 02:58:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:37,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 38 [2021-11-23 02:58:37,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:37,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 36 [2021-11-23 02:58:37,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:37,233 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 63 treesize of output 63 [2021-11-23 02:58:37,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:58:37,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:58:37,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:37,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:37,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:37,416 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-23 02:58:37,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 200 [2021-11-23 02:58:37,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:37,497 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-23 02:58:37,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 93 [2021-11-23 02:58:37,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:37,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:37,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:37,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:58:37,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 66 [2021-11-23 02:58:37,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:37,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:37,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:37,606 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:58:37,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2021-11-23 02:58:37,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:58:37,652 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:58:38,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '183#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-23 02:58:38,016 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:58:38,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:58:38,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-23 02:58:38,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158178705] [2021-11-23 02:58:38,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:58:38,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:58:38,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:58:38,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:58:38,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:58:38,018 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:38,169 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-11-23 02:58:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:58:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 02:58:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:38,171 INFO L225 Difference]: With dead ends: 28 [2021-11-23 02:58:38,172 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 02:58:38,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:58:38,173 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:38,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:58:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 02:58:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 14. [2021-11-23 02:58:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-23 02:58:38,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-11-23 02:58:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:38,183 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-23 02:58:38,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-23 02:58:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:58:38,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:38,186 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:38,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:38,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 02:58:38,387 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:38,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1258946262, now seen corresponding path program 2 times [2021-11-23 02:58:38,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:58:38,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504489576] [2021-11-23 02:58:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:38,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:58:38,440 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:58:38,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171967661] [2021-11-23 02:58:38,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:58:38,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:58:38,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:58:38,448 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:58:38,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:58:38,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:58:38,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:58:38,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:58:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:58:38,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:58:38,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:58:38,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504489576] [2021-11-23 02:58:38,636 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:58:38,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171967661] [2021-11-23 02:58:38,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171967661] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:58:38,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598209964] [2021-11-23 02:58:38,646 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 02:58:38,646 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:58:38,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:58:38,647 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:58:38,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:58:38,801 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 02:58:38,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 02:58:38,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-23 02:58:38,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 02:58:38,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:38,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:38,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:39,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:39,122 INFO L354 Elim1Store]: treesize reduction 318, result has 12.4 percent of original size [2021-11-23 02:58:39,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 408 treesize of output 447 [2021-11-23 02:58:39,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:39,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:39,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 80 [2021-11-23 02:58:39,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:39,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 83 [2021-11-23 02:58:39,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:58:39,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:39,396 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 63 treesize of output 63 [2021-11-23 02:58:39,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:58:39,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:58:39,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:39,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:39,515 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:58:39,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2021-11-23 02:58:39,543 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:58:39,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '313#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:58:39,900 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:58:39,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:58:39,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-23 02:58:39,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951947760] [2021-11-23 02:58:39,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:58:39,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:58:39,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:58:39,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:58:39,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:58:39,902 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-11-23 02:58:40,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:40,024 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-23 02:58:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:58:40,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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 10 [2021-11-23 02:58:40,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:40,025 INFO L225 Difference]: With dead ends: 35 [2021-11-23 02:58:40,026 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 02:58:40,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:58:40,027 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:40,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:58:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 02:58:40,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2021-11-23 02:58:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-11-23 02:58:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-23 02:58:40,032 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-23 02:58:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:40,032 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-23 02:58:40,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-11-23 02:58:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-23 02:58:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:58:40,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:40,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:40,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:40,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:58:40,260 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:40,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2034389572, now seen corresponding path program 3 times [2021-11-23 02:58:40,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:58:40,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254526750] [2021-11-23 02:58:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:40,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:58:40,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:58:40,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461504527] [2021-11-23 02:58:40,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:58:40,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:58:40,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:58:40,285 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:58:40,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23120fc-fb9a-4c2f-85d8-095cf2d776b5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:58:40,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:58:40,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:58:40,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:58:40,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:40,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:58:40,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:40,541 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:58:40,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-11-23 02:58:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:58:40,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:42,253 INFO L354 Elim1Store]: treesize reduction 1087, result has 37.4 percent of original size [2021-11-23 02:58:42,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 298 treesize of output 773 [2021-11-23 02:58:43,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:43,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:43,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:43,388 INFO L354 Elim1Store]: treesize reduction 113, result has 32.7 percent of original size [2021-11-23 02:58:43,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 204 treesize of output 204 [2021-11-23 02:58:58,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:58:58,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 984 treesize of output 956 [2021-11-23 02:58:58,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:58:58,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 956 treesize of output 948 [2021-11-23 02:58:58,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:58:58,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 948 treesize of output 932 [2021-11-23 02:58:58,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:58:58,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 932 treesize of output 912 [2021-11-23 02:59:08,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:08,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:08,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:08,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 476 treesize of output 446 [2021-11-23 02:59:08,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:08,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:08,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:08,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 395 treesize of output 365 [2021-11-23 02:59:09,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:09,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:09,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:09,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 284 [2021-11-23 02:59:09,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:09,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:09,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:09,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 203 [2021-11-23 02:59:10,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:10,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:10,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:10,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:10,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:10,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:10,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:10,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:11,354 INFO L354 Elim1Store]: treesize reduction 167, result has 61.4 percent of original size [2021-11-23 02:59:11,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 1943 treesize of output 2035