./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:16:11,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:16:11,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:16:11,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:16:11,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:16:11,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:16:11,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:16:11,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:16:11,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:16:11,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:16:11,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:16:11,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:16:11,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:16:11,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:16:11,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:16:11,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:16:11,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:16:11,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:16:11,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:16:11,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:16:11,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:16:11,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:16:11,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:16:11,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:16:11,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:16:11,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:16:11,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:16:11,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:16:11,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:16:11,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:16:11,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:16:11,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:16:11,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:16:11,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:16:11,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:16:11,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:16:11,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:16:11,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:16:11,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:16:11,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:16:11,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:16:11,321 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:16:11,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:16:11,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:16:11,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:16:11,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:16:11,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:16:11,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:16:11,351 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:16:11,351 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:16:11,351 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:16:11,352 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:16:11,352 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:16:11,352 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:16:11,352 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:16:11,352 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:16:11,353 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:16:11,353 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:16:11,353 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:16:11,353 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:16:11,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:16:11,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:16:11,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:16:11,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:16:11,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:16:11,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:16:11,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:16:11,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:16:11,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:16:11,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:16:11,356 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:16:11,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:16:11,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:16:11,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:16:11,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:16:11,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:16:11,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:16:11,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:16:11,358 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:16:11,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:16:11,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:16:11,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:16:11,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:16:11,359 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_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2021-11-25 18:16:11,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:16:11,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:16:11,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:16:11,660 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:16:11,661 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:16:11,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-patterns/array4_pattern.c [2021-11-25 18:16:11,726 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/data/9af131030/26349026c45c4970a5686316ee4b32ba/FLAG38a472b20 [2021-11-25 18:16:12,269 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:16:12,271 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/sv-benchmarks/c/array-patterns/array4_pattern.c [2021-11-25 18:16:12,282 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/data/9af131030/26349026c45c4970a5686316ee4b32ba/FLAG38a472b20 [2021-11-25 18:16:12,595 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/data/9af131030/26349026c45c4970a5686316ee4b32ba [2021-11-25 18:16:12,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:16:12,600 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:16:12,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:16:12,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:16:12,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:16:12,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:12,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c762636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12, skipping insertion in model container [2021-11-25 18:16:12,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:12,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:16:12,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:16:12,866 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_f6030206-29ad-4494-9f43-b3178fae2d4b/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2021-11-25 18:16:12,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:16:12,911 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:16:12,922 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_f6030206-29ad-4494-9f43-b3178fae2d4b/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2021-11-25 18:16:12,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:16:12,948 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:16:12,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12 WrapperNode [2021-11-25 18:16:12,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:16:12,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:16:12,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:16:12,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:16:12,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:12,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:12,990 INFO L137 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2021-11-25 18:16:12,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:16:12,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:16:12,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:16:12,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:16:13,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:13,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:13,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:13,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:13,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:13,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:13,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:13,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:16:13,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:16:13,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:16:13,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:16:13,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12" (1/1) ... [2021-11-25 18:16:13,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:16:13,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:13,059 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:16:13,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:16:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:16:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:16:13,114 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:16:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:16:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:16:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:16:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:16:13,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:16:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:16:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:16:13,188 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:16:13,190 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:16:13,355 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:16:13,399 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:16:13,399 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 18:16:13,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:16:13 BoogieIcfgContainer [2021-11-25 18:16:13,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:16:13,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:16:13,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:16:13,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:16:13,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:16:12" (1/3) ... [2021-11-25 18:16:13,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4623fb90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:16:13, skipping insertion in model container [2021-11-25 18:16:13,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:12" (2/3) ... [2021-11-25 18:16:13,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4623fb90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:16:13, skipping insertion in model container [2021-11-25 18:16:13,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:16:13" (3/3) ... [2021-11-25 18:16:13,411 INFO L111 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2021-11-25 18:16:13,417 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:16:13,417 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:16:13,472 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:16:13,480 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:16:13,481 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:16:13,499 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:16:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:16:13,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:13,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:13,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:16:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:13,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1119781689, now seen corresponding path program 1 times [2021-11-25 18:16:13,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:13,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86223500] [2021-11-25 18:16:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:13,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:16:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:16:13,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:13,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86223500] [2021-11-25 18:16:13,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86223500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:16:13,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:16:13,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:16:13,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084397309] [2021-11-25 18:16:13,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:16:13,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:16:13,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:13,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:16:13,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:16:13,824 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:16:13,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:13,871 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-25 18:16:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:16:13,874 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 18:16:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:13,882 INFO L225 Difference]: With dead ends: 29 [2021-11-25 18:16:13,883 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 18:16:13,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:16:13,890 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:13,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:16:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 18:16:13,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-25 18:16:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:16:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-11-25 18:16:13,934 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2021-11-25 18:16:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:13,936 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-11-25 18:16:13,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:16:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2021-11-25 18:16:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:16:13,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:13,939 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:13,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:16:13,940 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:16:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:13,941 INFO L85 PathProgramCache]: Analyzing trace with hash -166120417, now seen corresponding path program 1 times [2021-11-25 18:16:13,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:13,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642689301] [2021-11-25 18:16:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:13,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:13,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:16:13,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227554414] [2021-11-25 18:16:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:13,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:13,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:13,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:13,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:16:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:16:14,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:16:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:16:14,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:16:14,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:14,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642689301] [2021-11-25 18:16:14,271 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:16:14,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227554414] [2021-11-25 18:16:14,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227554414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:16:14,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:16:14,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:16:14,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537003759] [2021-11-25 18:16:14,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:16:14,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:16:14,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:14,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:16:14,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:16:14,276 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:16:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:14,314 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-25 18:16:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:16:14,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2021-11-25 18:16:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:14,316 INFO L225 Difference]: With dead ends: 24 [2021-11-25 18:16:14,316 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 18:16:14,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:16:14,318 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:14,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:16:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 18:16:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 18:16:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:16:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-11-25 18:16:14,327 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 27 [2021-11-25 18:16:14,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:14,328 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-11-25 18:16:14,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:16:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-11-25 18:16:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:16:14,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:14,330 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:14,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:16:14,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:14,545 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:16:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:14,546 INFO L85 PathProgramCache]: Analyzing trace with hash -855080832, now seen corresponding path program 1 times [2021-11-25 18:16:14,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:14,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318380038] [2021-11-25 18:16:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:14,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:14,582 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:16:14,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402721884] [2021-11-25 18:16:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:14,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:14,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:14,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:14,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:16:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:16:14,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:16:14,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:16:14,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:16:14,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:14,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318380038] [2021-11-25 18:16:14,846 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:16:14,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402721884] [2021-11-25 18:16:14,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402721884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:16:14,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:16:14,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:16:14,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866151272] [2021-11-25 18:16:14,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:16:14,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:16:14,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:14,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:16:14,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:16:14,858 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:16:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:14,971 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-11-25 18:16:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:16:14,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2021-11-25 18:16:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:14,975 INFO L225 Difference]: With dead ends: 39 [2021-11-25 18:16:14,975 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 18:16:14,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:16:14,982 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:14,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 67 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:16:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 18:16:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 18:16:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:16:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-25 18:16:15,006 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2021-11-25 18:16:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:15,007 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-25 18:16:15,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:16:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-25 18:16:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 18:16:15,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:15,011 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:15,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:16:15,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:15,232 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:16:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:15,233 INFO L85 PathProgramCache]: Analyzing trace with hash -70074783, now seen corresponding path program 1 times [2021-11-25 18:16:15,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:15,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43017356] [2021-11-25 18:16:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:15,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:15,274 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:16:15,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491706861] [2021-11-25 18:16:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:15,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:15,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:15,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:15,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:16:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:16:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 18:16:15,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:15,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:16:15,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:15,529 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 14 treesize of output 14 [2021-11-25 18:16:15,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2021-11-25 18:16:16,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:16,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 26 [2021-11-25 18:16:16,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:16,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:16,735 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-11-25 18:16:16,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 24 [2021-11-25 18:16:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:16:16,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:26,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:26,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43017356] [2021-11-25 18:16:26,325 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:16:26,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491706861] [2021-11-25 18:16:26,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491706861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:16:26,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1806209319] [2021-11-25 18:16:26,348 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:16:26,348 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:16:26,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:16:26,361 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:16:26,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:16:26,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,570 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:16:26,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:16:26,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,595 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 55 treesize of output 65 [2021-11-25 18:16:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 18:16:26,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:26,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:26,855 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 18:16:26,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 18:16:26,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:26,978 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:16:26,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:16:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:28,078 INFO L354 Elim1Store]: treesize reduction 52, result has 39.5 percent of original size [2021-11-25 18:16:28,079 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 3 case distinctions, treesize of input 230 treesize of output 192 [2021-11-25 18:16:28,663 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:16:28,666 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:16:31,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '577#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= 0 |#NULL.offset|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:16:31,824 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:16:31,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:16:31,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-25 18:16:31,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531788188] [2021-11-25 18:16:31,824 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:16:31,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 18:16:31,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 18:16:31,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1222, Unknown=6, NotChecked=0, Total=1406 [2021-11-25 18:16:31,827 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 18:16:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:31,963 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-11-25 18:16:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:16:31,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2021-11-25 18:16:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:31,967 INFO L225 Difference]: With dead ends: 57 [2021-11-25 18:16:31,967 INFO L226 Difference]: Without dead ends: 54 [2021-11-25 18:16:31,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=182, Invalid=1294, Unknown=6, NotChecked=0, Total=1482 [2021-11-25 18:16:31,969 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:31,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 146 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-11-25 18:16:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-25 18:16:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2021-11-25 18:16:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:16:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-11-25 18:16:31,981 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 29 [2021-11-25 18:16:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:31,982 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-11-25 18:16:31,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 18:16:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-11-25 18:16:31,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:16:31,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:31,984 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:32,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:16:32,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:32,212 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:16:32,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:32,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1504691040, now seen corresponding path program 2 times [2021-11-25 18:16:32,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:32,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975480241] [2021-11-25 18:16:32,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:32,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:32,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:16:32,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639088028] [2021-11-25 18:16:32,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:16:32,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:32,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:32,245 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:32,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:16:32,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 18:16:32,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:16:32,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:16:32,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:16:32,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:16:32,528 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:32,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975480241] [2021-11-25 18:16:32,529 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:16:32,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639088028] [2021-11-25 18:16:32,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639088028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:16:32,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036568932] [2021-11-25 18:16:32,532 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:16:32,532 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:16:32,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:16:32,533 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:16:32,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:16:32,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:32,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:32,658 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:16:32,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:16:32,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:32,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:32,677 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 55 treesize of output 65 [2021-11-25 18:16:32,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:32,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:32,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:16:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:32,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:32,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:32,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:32,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:32,930 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 18:16:32,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 18:16:33,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:33,085 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:16:33,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:16:33,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:33,417 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-25 18:16:33,417 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 3 case distinctions, treesize of input 78 treesize of output 59 [2021-11-25 18:16:33,582 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:16:33,584 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:16:34,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '928#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:16:34,939 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:16:34,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:16:34,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 18:16:34,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620300645] [2021-11-25 18:16:34,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:16:34,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:16:34,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:34,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:16:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:16:34,942 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:16:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:35,120 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-11-25 18:16:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:16:35,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2021-11-25 18:16:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:35,123 INFO L225 Difference]: With dead ends: 70 [2021-11-25 18:16:35,123 INFO L226 Difference]: Without dead ends: 67 [2021-11-25 18:16:35,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-11-25 18:16:35,124 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:35,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:16:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-25 18:16:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-11-25 18:16:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 18:16:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-11-25 18:16:35,143 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 30 [2021-11-25 18:16:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:35,144 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-11-25 18:16:35,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:16:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-11-25 18:16:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:16:35,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:35,150 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:35,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:16:35,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:35,376 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:16:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:35,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2122333822, now seen corresponding path program 3 times [2021-11-25 18:16:35,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:35,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689699657] [2021-11-25 18:16:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:35,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:35,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:16:35,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195909336] [2021-11-25 18:16:35,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:16:35,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:35,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:35,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:35,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:16:35,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:16:35,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:16:35,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:16:35,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:16:35,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:16:35,693 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:35,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689699657] [2021-11-25 18:16:35,694 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:16:35,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195909336] [2021-11-25 18:16:35,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195909336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:16:35,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218803776] [2021-11-25 18:16:35,699 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:16:35,699 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:16:35,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:16:35,700 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:16:35,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:16:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:35,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:35,821 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:16:35,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:16:35,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:35,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:35,940 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:16:35,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:16:35,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:35,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:16:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:36,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:36,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:36,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:36,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:36,207 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 18:16:36,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 18:16:36,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:36,358 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:16:36,358 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:16:36,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:36,648 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-25 18:16:36,648 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 3 case distinctions, treesize of input 78 treesize of output 59 [2021-11-25 18:16:36,798 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:16:36,800 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:16:38,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1319#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:16:38,226 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:16:38,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:16:38,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 18:16:38,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741199466] [2021-11-25 18:16:38,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:16:38,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:16:38,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:16:38,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:16:38,228 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:16:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:38,395 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2021-11-25 18:16:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:16:38,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2021-11-25 18:16:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:38,398 INFO L225 Difference]: With dead ends: 73 [2021-11-25 18:16:38,398 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 18:16:38,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-11-25 18:16:38,400 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:38,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 93 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:16:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 18:16:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2021-11-25 18:16:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 18:16:38,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2021-11-25 18:16:38,414 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 30 [2021-11-25 18:16:38,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:38,415 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2021-11-25 18:16:38,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:16:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2021-11-25 18:16:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 18:16:38,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:38,417 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:38,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:16:38,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:16:38,635 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:16:38,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:38,636 INFO L85 PathProgramCache]: Analyzing trace with hash 598902815, now seen corresponding path program 4 times [2021-11-25 18:16:38,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:38,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798837811] [2021-11-25 18:16:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:38,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:38,674 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:16:38,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194720703] [2021-11-25 18:16:38,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:16:38,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:38,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:38,676 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:38,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:16:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:16:38,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-25 18:16:38,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:38,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:16:38,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:38,838 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2021-11-25 18:16:38,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2021-11-25 18:16:38,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:16:38,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:16:38,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:38,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:38,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-25 18:16:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:41,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:41,608 INFO L354 Elim1Store]: treesize reduction 84, result has 40.4 percent of original size [2021-11-25 18:16:41,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 91 [2021-11-25 18:16:42,029 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-25 18:16:42,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 46 [2021-11-25 18:16:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:16:42,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:46,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798837811] [2021-11-25 18:16:46,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:16:46,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194720703] [2021-11-25 18:16:46,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194720703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:16:46,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [633993166] [2021-11-25 18:16:46,749 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:16:46,750 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:16:46,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:16:46,750 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:16:46,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:16:46,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:46,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:46,854 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:16:46,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:16:46,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:46,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:46,882 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 55 treesize of output 65 [2021-11-25 18:16:46,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:46,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:46,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 18:16:47,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:47,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:47,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:47,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:47,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:47,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:47,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:47,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:47,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:47,083 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 18:16:47,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 18:16:47,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:47,179 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:16:47,179 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:16:48,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:48,067 INFO L354 Elim1Store]: treesize reduction 52, result has 39.5 percent of original size [2021-11-25 18:16:48,069 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 3 case distinctions, treesize of input 230 treesize of output 192 [2021-11-25 18:16:48,546 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:16:48,549 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:16:52,885 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1712#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= 0 |#NULL.offset|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:16:52,885 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:16:52,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:16:52,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-25 18:16:52,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863048653] [2021-11-25 18:16:52,886 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:16:52,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 18:16:52,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:52,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 18:16:52,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1600, Unknown=3, NotChecked=0, Total=1806 [2021-11-25 18:16:52,888 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 18:16:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:53,460 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-11-25 18:16:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:16:53,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2021-11-25 18:16:53,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:53,462 INFO L225 Difference]: With dead ends: 86 [2021-11-25 18:16:53,462 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 18:16:53,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=209, Invalid=1680, Unknown=3, NotChecked=0, Total=1892 [2021-11-25 18:16:53,465 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 23 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:53,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 203 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 333 Invalid, 0 Unknown, 53 Unchecked, 0.5s Time] [2021-11-25 18:16:53,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 18:16:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2021-11-25 18:16:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-25 18:16:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-11-25 18:16:53,490 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 31 [2021-11-25 18:16:53,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:53,490 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-11-25 18:16:53,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 18:16:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-11-25 18:16:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 18:16:53,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:53,495 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:53,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:16:53,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:53,720 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:16:53,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:53,720 INFO L85 PathProgramCache]: Analyzing trace with hash 617181854, now seen corresponding path program 5 times [2021-11-25 18:16:53,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:53,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099948692] [2021-11-25 18:16:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:53,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:53,747 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:16:53,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189560709] [2021-11-25 18:16:53,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:16:53,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:53,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:53,749 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:53,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:16:53,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:16:53,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:16:53,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:16:53,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:16:54,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:16:54,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:54,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099948692] [2021-11-25 18:16:54,134 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:16:54,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189560709] [2021-11-25 18:16:54,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189560709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:16:54,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [584384499] [2021-11-25 18:16:54,138 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:16:54,138 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:16:54,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:16:54,139 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:16:54,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:16:54,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:54,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:54,276 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:16:54,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:16:54,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:54,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:54,296 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 55 treesize of output 65 [2021-11-25 18:16:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:54,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:16:54,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:54,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:54,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:54,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:54,549 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 18:16:54,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 18:16:54,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:54,693 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:16:54,694 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:16:54,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:54,998 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-25 18:16:54,999 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 3 case distinctions, treesize of input 78 treesize of output 59 [2021-11-25 18:16:55,147 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:16:55,149 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:16:56,529 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2176#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:16:56,529 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:16:56,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:16:56,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 18:16:56,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72220948] [2021-11-25 18:16:56,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:16:56,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:16:56,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:56,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:16:56,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-11-25 18:16:56,532 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:16:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:56,875 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2021-11-25 18:16:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:16:56,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2021-11-25 18:16:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:56,878 INFO L225 Difference]: With dead ends: 128 [2021-11-25 18:16:56,878 INFO L226 Difference]: Without dead ends: 125 [2021-11-25 18:16:56,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 18:16:56,880 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:56,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 146 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:16:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-25 18:16:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2021-11-25 18:16:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 18:16:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2021-11-25 18:16:56,899 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 32 [2021-11-25 18:16:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:56,900 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2021-11-25 18:16:56,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:16:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2021-11-25 18:16:56,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 18:16:56,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:56,902 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:56,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:16:57,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:57,116 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:16:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:57,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1385802880, now seen corresponding path program 6 times [2021-11-25 18:16:57,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:57,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289433533] [2021-11-25 18:16:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:57,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:57,152 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:16:57,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415818293] [2021-11-25 18:16:57,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:16:57,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:57,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:57,169 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:57,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:16:57,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:16:57,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:16:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:16:57,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:16:57,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:16:57,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289433533] [2021-11-25 18:16:57,449 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:16:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415818293] [2021-11-25 18:16:57,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415818293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:16:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708010208] [2021-11-25 18:16:57,451 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:16:57,451 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:16:57,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:16:57,452 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:16:57,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:16:57,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:57,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:57,611 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:16:57,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:16:57,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:57,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:57,721 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:16:57,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:16:57,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:57,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:57,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:16:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:57,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:57,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:57,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:57,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:57,945 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 18:16:57,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 18:16:58,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:58,067 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:16:58,067 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:16:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:58,354 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-25 18:16:58,355 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 3 case distinctions, treesize of input 78 treesize of output 59 [2021-11-25 18:16:58,502 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:16:58,505 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:17:00,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2727#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:17:00,076 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:17:00,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:17:00,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 18:17:00,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456934345] [2021-11-25 18:17:00,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:17:00,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:17:00,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:00,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:17:00,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-11-25 18:17:00,078 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:17:00,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:00,337 INFO L93 Difference]: Finished difference Result 155 states and 199 transitions. [2021-11-25 18:17:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:17:00,338 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2021-11-25 18:17:00,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:00,339 INFO L225 Difference]: With dead ends: 155 [2021-11-25 18:17:00,339 INFO L226 Difference]: Without dead ends: 147 [2021-11-25 18:17:00,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:17:00,341 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 82 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:00,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 155 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:17:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-25 18:17:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 85. [2021-11-25 18:17:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 18:17:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2021-11-25 18:17:00,362 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 32 [2021-11-25 18:17:00,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:00,363 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2021-11-25 18:17:00,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:17:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2021-11-25 18:17:00,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 18:17:00,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:00,365 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:17:00,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-25 18:17:00,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:00,572 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1952453089, now seen corresponding path program 7 times [2021-11-25 18:17:00,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:00,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637398643] [2021-11-25 18:17:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:00,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:00,599 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:17:00,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543838920] [2021-11-25 18:17:00,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:17:00,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:00,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:17:00,600 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:17:00,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:17:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:00,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-25 18:17:00,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:17:00,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:17:00,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:00,860 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2021-11-25 18:17:00,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2021-11-25 18:17:00,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:17:00,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:17:00,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:00,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:00,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-25 18:17:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:00,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:00,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:00,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:00,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:00,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:00,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 66 treesize of output 63 [2021-11-25 18:17:04,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:04,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:04,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:04,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:04,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:04,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:05,060 INFO L354 Elim1Store]: treesize reduction 132, result has 39.7 percent of original size [2021-11-25 18:17:05,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 90 treesize of output 127 [2021-11-25 18:17:05,839 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:17:05,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2021-11-25 18:17:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:17:05,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:17:09,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:09,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637398643] [2021-11-25 18:17:09,536 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:17:09,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543838920] [2021-11-25 18:17:09,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543838920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:17:09,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40663513] [2021-11-25 18:17:09,538 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:17:09,538 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:17:09,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:17:09,539 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:17:09,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:17:09,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,643 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:17:09,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:17:09,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,727 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:17:09,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:17:09,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 18:17:09,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:09,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:09,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:09,922 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 18:17:09,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 18:17:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:09,994 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:17:09,995 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:17:11,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:11,120 INFO L354 Elim1Store]: treesize reduction 52, result has 39.5 percent of original size [2021-11-25 18:17:11,120 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 3 case distinctions, treesize of input 228 treesize of output 190 [2021-11-25 18:17:11,664 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2021-11-25 18:17:11,672 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:17:15,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3307#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:17:15,994 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:17:15,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:17:15,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-25 18:17:15,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964247395] [2021-11-25 18:17:15,995 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:17:15,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:17:15,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:17:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2370, Unknown=4, NotChecked=0, Total=2652 [2021-11-25 18:17:15,997 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:17:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:17,115 INFO L93 Difference]: Finished difference Result 118 states and 142 transitions. [2021-11-25 18:17:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:17:17,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 33 [2021-11-25 18:17:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:17,117 INFO L225 Difference]: With dead ends: 118 [2021-11-25 18:17:17,118 INFO L226 Difference]: Without dead ends: 115 [2021-11-25 18:17:17,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=328, Invalid=2974, Unknown=4, NotChecked=0, Total=3306 [2021-11-25 18:17:17,120 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:17,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 174 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 554 Invalid, 0 Unknown, 82 Unchecked, 0.6s Time] [2021-11-25 18:17:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-25 18:17:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2021-11-25 18:17:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 66 states have internal predecessors, (74), 26 states have call successors, (26), 13 states have call predecessors, (26), 13 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-25 18:17:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2021-11-25 18:17:17,142 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 33 [2021-11-25 18:17:17,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:17,142 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2021-11-25 18:17:17,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:17:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2021-11-25 18:17:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:17:17,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:17,145 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:17:17,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:17:17,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:17:17,362 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:17,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:17,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1956226912, now seen corresponding path program 8 times [2021-11-25 18:17:17,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:17,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799482949] [2021-11-25 18:17:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:17,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:17,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:17:17,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488467672] [2021-11-25 18:17:17,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:17:17,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:17,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:17:17,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:17:17,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:17:17,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:17:17,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:17:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:17:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:17:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:17:17,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:17:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:17:17,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:17,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799482949] [2021-11-25 18:17:17,764 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:17:17,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488467672] [2021-11-25 18:17:17,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488467672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:17:17,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [414439714] [2021-11-25 18:17:17,766 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:17:17,766 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:17:17,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:17:17,767 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:17:17,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:17:17,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:17,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:17,860 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:17:17,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:17:17,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:17,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:17,874 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 55 treesize of output 65 [2021-11-25 18:17:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:17,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:17,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:17:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:17,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:17,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:17,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:18,064 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 18:17:18,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-25 18:17:18,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:18,168 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:17:18,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:17:18,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:18,428 INFO L354 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2021-11-25 18:17:18,428 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 3 case distinctions, treesize of input 78 treesize of output 59 [2021-11-25 18:17:18,542 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:17:18,544 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:17:19,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3898#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:17:19,889 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:17:19,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:17:19,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-25 18:17:19,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732571036] [2021-11-25 18:17:19,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:17:19,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:17:19,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:19,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:17:19,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 18:17:19,891 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:17:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:20,221 INFO L93 Difference]: Finished difference Result 177 states and 219 transitions. [2021-11-25 18:17:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:17:20,222 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2021-11-25 18:17:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:20,224 INFO L225 Difference]: With dead ends: 177 [2021-11-25 18:17:20,224 INFO L226 Difference]: Without dead ends: 174 [2021-11-25 18:17:20,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:17:20,226 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 81 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:20,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 194 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:17:20,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-25 18:17:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 116. [2021-11-25 18:17:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 72 states have internal predecessors, (81), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-25 18:17:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2021-11-25 18:17:20,251 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 34 [2021-11-25 18:17:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:20,252 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2021-11-25 18:17:20,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:17:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2021-11-25 18:17:20,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:17:20,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:20,253 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:17:20,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:17:20,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:20,470 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:20,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:20,470 INFO L85 PathProgramCache]: Analyzing trace with hash 396188414, now seen corresponding path program 9 times [2021-11-25 18:17:20,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:20,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860099189] [2021-11-25 18:17:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:20,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:20,493 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:17:20,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603509753] [2021-11-25 18:17:20,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:17:20,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:20,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:17:20,508 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:17:20,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:17:20,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:17:20,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:17:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:17:20,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:17:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:17:20,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:17:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:17:20,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:20,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860099189] [2021-11-25 18:17:20,833 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:17:20,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603509753] [2021-11-25 18:17:20,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603509753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:17:20,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [169420306] [2021-11-25 18:17:20,835 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:17:20,835 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:17:20,836 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:17:20,836 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:17:20,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:17:20,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:20,939 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:17:20,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:17:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:20,951 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 55 treesize of output 65 [2021-11-25 18:17:20,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:20,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:20,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 18:17:21,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:21,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:21,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:21,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:21,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:21,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:21,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:21,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:21,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:21,095 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 18:17:21,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 18:17:21,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:21,171 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:17:21,172 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:17:21,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:21,793 INFO L354 Elim1Store]: treesize reduction 52, result has 39.5 percent of original size [2021-11-25 18:17:21,794 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 3 case distinctions, treesize of input 230 treesize of output 192 [2021-11-25 18:17:22,083 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:17:22,085 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:17:24,522 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4594#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= 0 |#NULL.offset|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:17:24,522 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:17:24,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:17:24,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-25 18:17:24,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390639666] [2021-11-25 18:17:24,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:17:24,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:17:24,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:24,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:17:24,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 18:17:24,524 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:17:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:24,945 INFO L93 Difference]: Finished difference Result 250 states and 328 transitions. [2021-11-25 18:17:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:17:24,946 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2021-11-25 18:17:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:24,948 INFO L225 Difference]: With dead ends: 250 [2021-11-25 18:17:24,948 INFO L226 Difference]: Without dead ends: 241 [2021-11-25 18:17:24,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 18:17:24,950 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 234 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:24,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 204 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:17:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-25 18:17:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 117. [2021-11-25 18:17:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.125) internal successors, (81), 73 states have internal predecessors, (81), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-25 18:17:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2021-11-25 18:17:24,977 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 34 [2021-11-25 18:17:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:24,977 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2021-11-25 18:17:24,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:17:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2021-11-25 18:17:24,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 18:17:24,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:24,979 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:17:25,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:17:25,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:25,193 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:25,193 INFO L85 PathProgramCache]: Analyzing trace with hash -513807329, now seen corresponding path program 10 times [2021-11-25 18:17:25,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:25,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811922213] [2021-11-25 18:17:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:25,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:25,223 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:17:25,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262746500] [2021-11-25 18:17:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:17:25,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:25,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:17:25,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:17:25,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:17:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:25,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-25 18:17:25,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:17:25,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:17:25,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,608 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2021-11-25 18:17:25,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:17:25,618 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 29 treesize of output 28 [2021-11-25 18:17:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-25 18:17:25,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 75 treesize of output 69 [2021-11-25 18:17:25,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:25,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2021-11-25 18:17:31,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:31,216 INFO L354 Elim1Store]: treesize reduction 180, result has 39.4 percent of original size [2021-11-25 18:17:31,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 163 [2021-11-25 18:17:32,753 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-25 18:17:32,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 120 [2021-11-25 18:17:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:17:32,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:17:36,658 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811922213] [2021-11-25 18:17:36,658 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:17:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262746500] [2021-11-25 18:17:36,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262746500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:17:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [519230642] [2021-11-25 18:17:36,660 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:17:36,660 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:17:36,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:17:36,660 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:17:36,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:17:36,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,777 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:17:36,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:17:36,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,791 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 55 treesize of output 65 [2021-11-25 18:17:36,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 18:17:36,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:36,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:36,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:36,956 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 18:17:36,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 18:17:37,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:37,021 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:17:37,021 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:17:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:37,603 INFO L354 Elim1Store]: treesize reduction 52, result has 39.5 percent of original size [2021-11-25 18:17:37,603 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 3 case distinctions, treesize of input 230 treesize of output 192 [2021-11-25 18:17:37,970 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:17:37,972 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:17:43,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5385#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= 0 |#NULL.offset|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:17:43,667 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:17:43,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:17:43,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-25 18:17:43,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516131986] [2021-11-25 18:17:43,668 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:17:43,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:17:43,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:43,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:17:43,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2293, Unknown=5, NotChecked=0, Total=2550 [2021-11-25 18:17:43,669 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:17:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:45,263 INFO L93 Difference]: Finished difference Result 150 states and 181 transitions. [2021-11-25 18:17:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:17:45,264 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2021-11-25 18:17:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:45,265 INFO L225 Difference]: With dead ends: 150 [2021-11-25 18:17:45,265 INFO L226 Difference]: Without dead ends: 147 [2021-11-25 18:17:45,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=286, Invalid=2901, Unknown=5, NotChecked=0, Total=3192 [2021-11-25 18:17:45,267 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:45,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 173 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 498 Invalid, 0 Unknown, 77 Unchecked, 0.8s Time] [2021-11-25 18:17:45,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-25 18:17:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2021-11-25 18:17:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 84 states have (on average 1.130952380952381) internal successors, (95), 86 states have internal predecessors, (95), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-25 18:17:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 165 transitions. [2021-11-25 18:17:45,296 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 165 transitions. Word has length 35 [2021-11-25 18:17:45,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:45,296 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 165 transitions. [2021-11-25 18:17:45,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:17:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 165 transitions. [2021-11-25 18:17:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 18:17:45,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:45,298 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:17:45,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:17:45,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:17:45,508 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1341095710, now seen corresponding path program 11 times [2021-11-25 18:17:45,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:45,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875325262] [2021-11-25 18:17:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:45,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:45,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:17:45,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812550221] [2021-11-25 18:17:45,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:17:45,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:45,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:17:45,550 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:17:45,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:17:45,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 18:17:45,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:17:45,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:17:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:17:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:17:45,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:17:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:17:45,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:45,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875325262] [2021-11-25 18:17:45,983 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:17:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812550221] [2021-11-25 18:17:45,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812550221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:17:45,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1890412497] [2021-11-25 18:17:45,986 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:17:45,986 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:17:45,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:17:45,987 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:17:45,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:17:46,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,089 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:17:46,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:17:46,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,104 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 55 treesize of output 65 [2021-11-25 18:17:46,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 18:17:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:46,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:46,265 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 18:17:46,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 18:17:46,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:46,327 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:17:46,328 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:17:46,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:46,976 INFO L354 Elim1Store]: treesize reduction 52, result has 39.5 percent of original size [2021-11-25 18:17:46,976 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 3 case distinctions, treesize of input 230 treesize of output 192 [2021-11-25 18:17:47,322 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:17:47,324 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:17:49,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6093#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:17:49,642 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:17:49,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:17:49,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-25 18:17:49,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964408345] [2021-11-25 18:17:49,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:17:49,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 18:17:49,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 18:17:49,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 18:17:49,644 INFO L87 Difference]: Start difference. First operand 137 states and 165 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:17:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:50,197 INFO L93 Difference]: Finished difference Result 227 states and 280 transitions. [2021-11-25 18:17:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:17:50,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2021-11-25 18:17:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:50,199 INFO L225 Difference]: With dead ends: 227 [2021-11-25 18:17:50,199 INFO L226 Difference]: Without dead ends: 224 [2021-11-25 18:17:50,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 18:17:50,202 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 113 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:50,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 266 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:17:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-25 18:17:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 148. [2021-11-25 18:17:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 92 states have internal predecessors, (102), 39 states have call successors, (39), 18 states have call predecessors, (39), 18 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-25 18:17:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 180 transitions. [2021-11-25 18:17:50,237 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 180 transitions. Word has length 36 [2021-11-25 18:17:50,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:50,237 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 180 transitions. [2021-11-25 18:17:50,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:17:50,237 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 180 transitions. [2021-11-25 18:17:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 18:17:50,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:50,238 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:17:50,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:17:50,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:50,439 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:50,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:50,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1251526784, now seen corresponding path program 12 times [2021-11-25 18:17:50,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:50,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176104185] [2021-11-25 18:17:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:50,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:50,455 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:17:50,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123945753] [2021-11-25 18:17:50,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:17:50,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:50,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:17:50,456 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:17:50,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:17:50,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:17:50,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:17:50,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:17:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:17:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:17:50,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:17:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:17:50,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176104185] [2021-11-25 18:17:50,882 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:17:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123945753] [2021-11-25 18:17:50,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123945753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:17:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1151195344] [2021-11-25 18:17:50,884 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:17:50,884 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:17:50,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:17:50,885 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:17:50,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:17:50,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:50,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,005 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:17:51,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:17:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,021 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 55 treesize of output 65 [2021-11-25 18:17:51,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 18:17:51,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:51,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:51,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:51,209 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 18:17:51,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-25 18:17:51,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:17:51,294 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:17:51,294 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-25 18:17:51,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:52,030 INFO L354 Elim1Store]: treesize reduction 52, result has 39.5 percent of original size [2021-11-25 18:17:52,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 192 [2021-11-25 18:17:52,394 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:17:52,396 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:17:55,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6936#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= 0 |#NULL.offset|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:17:55,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:17:55,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:17:55,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-25 18:17:55,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319154676] [2021-11-25 18:17:55,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:17:55,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 18:17:55,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:55,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 18:17:55,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 18:17:55,135 INFO L87 Difference]: Start difference. First operand 148 states and 180 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:17:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:55,980 INFO L93 Difference]: Finished difference Result 375 states and 497 transitions. [2021-11-25 18:17:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:17:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2021-11-25 18:17:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:55,984 INFO L225 Difference]: With dead ends: 375 [2021-11-25 18:17:55,984 INFO L226 Difference]: Without dead ends: 365 [2021-11-25 18:17:55,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:17:55,988 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 400 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:55,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 319 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:17:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-25 18:17:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 149. [2021-11-25 18:17:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.120879120879121) internal successors, (102), 93 states have internal predecessors, (102), 39 states have call successors, (39), 18 states have call predecessors, (39), 18 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-25 18:17:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 180 transitions. [2021-11-25 18:17:56,034 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 180 transitions. Word has length 36 [2021-11-25 18:17:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:56,035 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 180 transitions. [2021-11-25 18:17:56,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:17:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 180 transitions. [2021-11-25 18:17:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 18:17:56,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:56,036 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:17:56,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:17:56,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:17:56,252 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:56,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1376021151, now seen corresponding path program 13 times [2021-11-25 18:17:56,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:56,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867578076] [2021-11-25 18:17:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:56,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:56,271 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:17:56,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105277958] [2021-11-25 18:17:56,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:17:56,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:56,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:17:56,295 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:17:56,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6030206-29ad-4494-9f43-b3178fae2d4b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:17:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:56,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-25 18:17:56,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:17:56,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:17:56,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,599 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2021-11-25 18:17:56,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2021-11-25 18:17:56,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:17:56,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:17:56,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2021-11-25 18:17:56,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 91 treesize of output 85 [2021-11-25 18:17:56,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 115 [2021-11-25 18:17:56,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:17:56,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2021-11-25 18:18:05,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:05,274 INFO L354 Elim1Store]: treesize reduction 228, result has 39.2 percent of original size [2021-11-25 18:18:05,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 199 [2021-11-25 18:18:07,842 INFO L354 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2021-11-25 18:18:07,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2021-11-25 18:18:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:18:07,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:18:21,560 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~nondet6#1| Int) (|ULTIMATE.start_main_#t~nondet7#1| Int)) (let ((.cse10 (* |c_ULTIMATE.start_main_~count~0#1| 4))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse10) 0)))) (let ((.cse8 (store (select .cse9 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) 0))) (let ((.cse7 (store .cse9 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse8))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~count~0#1| 1)) (.cse1 (select .cse7 |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* |ULTIMATE.start_main_#t~nondet6#1| 4))) (.cse6 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| (* |ULTIMATE.start_main_#t~nondet7#1| 4)))) (or (<= .cse0 |ULTIMATE.start_main_#t~nondet6#1|) (< |ULTIMATE.start_main_#t~nondet6#1| 0) (<= .cse0 |ULTIMATE.start_main_#t~nondet7#1|) (< |ULTIMATE.start_main_#t~nondet7#1| 0) (not (= (select .cse1 .cse2) 0)) (= (let ((.cse5 (store .cse7 |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse1 .cse2 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| 1))))) (let ((.cse3 (store (select .cse5 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse6 |c_ULTIMATE.start_main_~num~0#1|))) (let ((.cse4 (select (store .cse5 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse3) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse3 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse4 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 16)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)))))) 0) (not (= (select .cse8 .cse6) 0))))))))) is different from false [2021-11-25 18:18:56,904 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~nondet6#1| Int) (|ULTIMATE.start_main_#t~nondet7#1| Int)) (let ((.cse10 (* |c_ULTIMATE.start_main_~count~0#1| 4))) (let ((.cse9 (let ((.cse11 (let ((.cse12 (let ((.cse13 (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse10) 0)))) (store .cse14 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse14 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) 0))))) (store .cse13 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse13 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4 .cse10) 0))))) (store .cse12 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse12 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4 .cse10) 0))))) (store .cse11 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse11 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8 .cse10) 0))))) (let ((.cse2 (store (select .cse9 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8 .cse10) 0))) (let ((.cse8 (store .cse9 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse2))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~count~0#1| 3)) (.cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| (* |ULTIMATE.start_main_#t~nondet7#1| 4))) (.cse0 (select .cse8 |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* |ULTIMATE.start_main_#t~nondet6#1| 4)))) (or (not (= (select .cse0 .cse1) 0)) (< |ULTIMATE.start_main_#t~nondet6#1| 0) (not (= (select .cse2 .cse3) 0)) (<= .cse4 |ULTIMATE.start_main_#t~nondet6#1|) (<= .cse4 |ULTIMATE.start_main_#t~nondet7#1|) (< |ULTIMATE.start_main_#t~nondet7#1| 0) (= (let ((.cse7 (store .cse8 |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse0 .cse1 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| 1))))) (let ((.cse5 (store (select .cse7 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse3 |c_ULTIMATE.start_main_~num~0#1|))) (let ((.cse6 (select (store .cse7 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse5) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse5 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse6 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse6 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse6 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse6 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse5 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse5 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse5 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 16)) (select .cse6 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse5 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)))))) 0)))))))) is different from false [2021-11-25 18:19:05,324 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~nondet6#1| Int) (|ULTIMATE.start_main_#t~nondet7#1| Int)) (let ((.cse10 (* |c_ULTIMATE.start_main_~count~0#1| 4))) (let ((.cse9 (let ((.cse11 (let ((.cse12 (let ((.cse13 (let ((.cse14 (let ((.cse15 (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse10) 0)))) (store .cse16 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse16 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse10) 0))))) (store .cse15 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse15 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4 .cse10) 0))))) (store .cse14 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse14 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4 .cse10) 0))))) (store .cse13 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse13 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8 .cse10) 0))))) (store .cse12 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse12 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8 .cse10) 0))))) (store .cse11 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse11 |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12 .cse10) 0))))) (let ((.cse2 (store (select .cse9 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12 .cse10) 0))) (let ((.cse8 (store .cse9 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse2))) (let ((.cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| (* |ULTIMATE.start_main_#t~nondet7#1| 4))) (.cse0 (select .cse8 |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* |ULTIMATE.start_main_#t~nondet6#1| 4))) (.cse4 (+ |c_ULTIMATE.start_main_~count~0#1| 4))) (or (not (= (select .cse0 .cse1) 0)) (< |ULTIMATE.start_main_#t~nondet6#1| 0) (not (= (select .cse2 .cse3) 0)) (<= .cse4 |ULTIMATE.start_main_#t~nondet7#1|) (< |ULTIMATE.start_main_#t~nondet7#1| 0) (= (let ((.cse7 (store .cse8 |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse0 .cse1 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| 1))))) (let ((.cse6 (store (select .cse7 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse3 |c_ULTIMATE.start_main_~num~0#1|))) (let ((.cse5 (select (store .cse7 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse6) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse5 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse5 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse6 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 16)) (select .cse6 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse6 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse5 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse5 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse6 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse5 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse6 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) 0) (<= .cse4 |ULTIMATE.start_main_#t~nondet6#1|)))))))) is different from false [2021-11-25 18:19:28,808 WARN L227 SmtUtils]: Spent 23.28s on a formula simplification. DAG size of input: 28 DAG size of output: 25 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 18:19:28,808 INFO L354 Elim1Store]: treesize reduction 17, result has 66.0 percent of original size [2021-11-25 18:19:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 580650 treesize of output 371018 [2021-11-25 18:19:30,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:19:30,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 194341 treesize of output 137903