./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array2_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array2_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a25becec148beba97bef86c2a84619bb26dfafe7c127e8d70246837f0d2d470 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:08:51,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:08:51,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:08:51,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:08:51,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:08:51,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:08:51,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:08:51,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:08:51,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:08:51,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:08:51,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:08:51,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:08:51,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:08:51,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:08:51,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:08:51,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:08:51,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:08:51,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:08:51,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:08:51,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:08:51,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:08:51,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:08:51,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:08:51,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:08:51,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:08:51,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:08:51,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:08:51,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:08:51,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:08:51,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:08:51,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:08:51,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:08:51,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:08:51,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:08:51,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:08:51,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:08:51,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:08:51,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:08:51,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:08:51,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:08:51,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:08:51,304 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:08:51,360 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:08:51,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:08:51,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:08:51,362 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:08:51,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:08:51,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:08:51,364 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:08:51,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:08:51,365 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:08:51,365 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:08:51,366 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:08:51,367 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:08:51,367 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:08:51,367 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:08:51,368 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:08:51,368 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:08:51,368 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:08:51,368 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:08:51,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:08:51,370 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:08:51,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:08:51,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:08:51,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:08:51,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:08:51,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:08:51,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:08:51,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:08:51,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:08:51,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:08:51,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:08:51,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:08:51,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:08:51,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:08:51,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:08:51,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:08:51,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:08:51,376 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:08:51,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:08:51,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:08:51,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:08:51,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:08:51,377 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_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a25becec148beba97bef86c2a84619bb26dfafe7c127e8d70246837f0d2d470 [2021-11-23 03:08:51,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:08:51,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:08:51,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:08:51,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:08:51,740 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:08:51,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-patterns/array2_pattern.c [2021-11-23 03:08:51,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/data/d5d1d0e84/1b19c21e0aaa4ebf9c89e62ae7b0a40d/FLAGa4c932b4e [2021-11-23 03:08:52,415 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:08:52,416 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/sv-benchmarks/c/array-patterns/array2_pattern.c [2021-11-23 03:08:52,433 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/data/d5d1d0e84/1b19c21e0aaa4ebf9c89e62ae7b0a40d/FLAGa4c932b4e [2021-11-23 03:08:52,742 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/data/d5d1d0e84/1b19c21e0aaa4ebf9c89e62ae7b0a40d [2021-11-23 03:08:52,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:08:52,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:08:52,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:08:52,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:08:52,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:08:52,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:08:52" (1/1) ... [2021-11-23 03:08:52,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16e721ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:52, skipping insertion in model container [2021-11-23 03:08:52,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:08:52" (1/1) ... [2021-11-23 03:08:52,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:08:52,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:08:53,055 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_83faecf7-9655-462d-8b39-b0c6f7d0a78c/sv-benchmarks/c/array-patterns/array2_pattern.c[1322,1335] [2021-11-23 03:08:53,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:08:53,101 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:08:53,116 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_83faecf7-9655-462d-8b39-b0c6f7d0a78c/sv-benchmarks/c/array-patterns/array2_pattern.c[1322,1335] [2021-11-23 03:08:53,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:08:53,158 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:08:53,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53 WrapperNode [2021-11-23 03:08:53,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:08:53,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:08:53,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:08:53,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:08:53,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53" (1/1) ... [2021-11-23 03:08:53,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53" (1/1) ... [2021-11-23 03:08:53,204 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2021-11-23 03:08:53,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:08:53,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:08:53,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:08:53,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:08:53,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53" (1/1) ... [2021-11-23 03:08:53,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53" (1/1) ... [2021-11-23 03:08:53,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53" (1/1) ... [2021-11-23 03:08:53,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53" (1/1) ... [2021-11-23 03:08:53,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53" (1/1) ... [2021-11-23 03:08:53,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53" (1/1) ... [2021-11-23 03:08:53,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53" (1/1) ... [2021-11-23 03:08:53,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:08:53,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:08:53,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:08:53,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:08:53,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53" (1/1) ... [2021-11-23 03:08:53,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:08:53,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:53,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:08:53,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:08:53,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:08:53,335 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:08:53,335 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:08:53,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:08:53,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:08:53,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:08:53,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:08:53,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:08:53,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:08:53,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:08:53,440 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:08:53,443 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:08:53,788 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:08:53,844 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:08:53,844 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:08:53,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:08:53 BoogieIcfgContainer [2021-11-23 03:08:53,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:08:53,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:08:53,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:08:53,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:08:53,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:08:52" (1/3) ... [2021-11-23 03:08:53,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26151bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:08:53, skipping insertion in model container [2021-11-23 03:08:53,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:53" (2/3) ... [2021-11-23 03:08:53,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26151bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:08:53, skipping insertion in model container [2021-11-23 03:08:53,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:08:53" (3/3) ... [2021-11-23 03:08:53,858 INFO L111 eAbstractionObserver]: Analyzing ICFG array2_pattern.c [2021-11-23 03:08:53,864 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:08:53,864 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:08:53,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:08:53,970 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:08:53,971 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:08:54,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:08:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:08:54,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:54,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:54,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:54,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:54,035 INFO L85 PathProgramCache]: Analyzing trace with hash -348000308, now seen corresponding path program 1 times [2021-11-23 03:08:54,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:54,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916897269] [2021-11-23 03:08:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:54,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:08:54,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:54,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916897269] [2021-11-23 03:08:54,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916897269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:08:54,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:08:54,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:08:54,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131920422] [2021-11-23 03:08:54,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:08:54,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:08:54,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:54,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:08:54,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:08:54,399 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2021-11-23 03:08:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:54,471 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-23 03:08:54,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:08:54,475 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 [2021-11-23 03:08:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:54,484 INFO L225 Difference]: With dead ends: 24 [2021-11-23 03:08:54,485 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 03:08:54,490 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 [2021-11-23 03:08:54,497 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:54,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:08:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 03:08:54,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 03:08:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:08:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-23 03:08:54,550 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-11-23 03:08:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:54,552 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-23 03:08:54,552 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) [2021-11-23 03:08:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-23 03:08:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:08:54,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:54,557 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:54,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:08:54,558 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1400754714, now seen corresponding path program 1 times [2021-11-23 03:08:54,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:54,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672194777] [2021-11-23 03:08:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:54,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:54,613 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:54,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780145738] [2021-11-23 03:08:54,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:54,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:54,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:54,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:54,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:08:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:08:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:08:54,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:08:54,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672194777] [2021-11-23 03:08:54,858 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:08:54,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780145738] [2021-11-23 03:08:54,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780145738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:08:54,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:08:54,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:08:54,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717245748] [2021-11-23 03:08:54,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:08:54,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:08:54,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:54,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:08:54,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:08:54,864 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:08:54,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:54,920 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-23 03:08:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:08:54,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-23 03:08:54,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:54,923 INFO L225 Difference]: With dead ends: 19 [2021-11-23 03:08:54,924 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 03:08:54,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:08:54,927 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:54,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:08:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 03:08:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 03:08:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:08:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-23 03:08:54,941 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2021-11-23 03:08:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:54,943 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-23 03:08:54,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:08:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-23 03:08:54,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:08:54,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:54,947 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:55,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 03:08:55,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:55,173 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:55,174 INFO L85 PathProgramCache]: Analyzing trace with hash 473487722, now seen corresponding path program 1 times [2021-11-23 03:08:55,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:55,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300539938] [2021-11-23 03:08:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:55,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:55,198 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:55,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937716720] [2021-11-23 03:08:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:55,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:55,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:55,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:55,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:08:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:55,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:08:55,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:08:55,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:08:55,394 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:55,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300539938] [2021-11-23 03:08:55,394 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:08:55,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937716720] [2021-11-23 03:08:55,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937716720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:08:55,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:08:55,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:08:55,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714482357] [2021-11-23 03:08:55,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:08:55,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:08:55,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:55,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:08:55,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:08:55,399 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:08:55,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:55,494 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-23 03:08:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:08:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-23 03:08:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:55,497 INFO L225 Difference]: With dead ends: 29 [2021-11-23 03:08:55,497 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 03:08:55,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:08:55,502 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:55,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:08:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 03:08:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 03:08:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:08:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-23 03:08:55,522 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2021-11-23 03:08:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:55,523 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-23 03:08:55,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:08:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-23 03:08:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:08:55,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:55,526 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:55,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:08:55,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:55,744 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:55,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash 199414858, now seen corresponding path program 1 times [2021-11-23 03:08:55,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:55,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107914691] [2021-11-23 03:08:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:55,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:55,783 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:08:55,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566194776] [2021-11-23 03:08:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:55,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:55,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:55,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:55,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:08:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:55,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 03:08:55,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:55,999 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 [2021-11-23 03:08:56,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 03:08:56,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:56,838 INFO L354 Elim1Store]: treesize reduction 393, result has 10.9 percent of original size [2021-11-23 03:08:56,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 219 treesize of output 163 [2021-11-23 03:08:56,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:08:57,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:57,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:08:57,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:08:57,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 67 [2021-11-23 03:08:57,571 INFO L354 Elim1Store]: treesize reduction 87, result has 7.4 percent of original size [2021-11-23 03:08:57,572 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 54 treesize of output 33 [2021-11-23 03:08:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:08:57,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:09:02,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:02,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107914691] [2021-11-23 03:09:02,924 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:02,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566194776] [2021-11-23 03:09:02,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566194776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:09:02,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088565841] [2021-11-23 03:09:02,943 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:09:02,944 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:09:02,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:09:02,957 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:09:02,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:09:03,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,219 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:09:03,220 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 [2021-11-23 03:09:03,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,250 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 [2021-11-23 03:09:03,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,353 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 [2021-11-23 03:09:03,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:03,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:03,577 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 03:09:03,577 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 [2021-11-23 03:09:03,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:03,716 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:09:03,716 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 [2021-11-23 03:09:03,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:03,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:04,504 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:09:04,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 984 treesize of output 626 [2021-11-23 03:09:04,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:04,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:04,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:04,995 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:04,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 90 [2021-11-23 03:09:05,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:05,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:05,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:05,228 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:05,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 81 [2021-11-23 03:09:05,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:05,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:05,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:05,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 81 [2021-11-23 03:09:05,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:05,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:05,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:05,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 81 [2021-11-23 03:09:05,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:05,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 47 [2021-11-23 03:09:05,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:05,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:05,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:05,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 131 [2021-11-23 03:09:05,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:05,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:05,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:05,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:05,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:06,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:06,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:06,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:06,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 112 [2021-11-23 03:09:06,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:06,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:06,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:06,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 109 [2021-11-23 03:09:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:06,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:06,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:06,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 90 [2021-11-23 03:09:06,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:06,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:06,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:06,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:09:06,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 804 treesize of output 509 [2021-11-23 03:09:06,740 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:09:06,775 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:09:08,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '384#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:09:08,959 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:09:08,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:09:08,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-23 03:09:08,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923808155] [2021-11-23 03:09:08,959 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:09:08,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:09:08,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:08,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:09:08,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=705, Unknown=2, NotChecked=0, Total=812 [2021-11-23 03:09:08,963 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:09:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:09,192 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-11-23 03:09:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:09:09,193 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-23 03:09:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:09,195 INFO L225 Difference]: With dead ends: 32 [2021-11-23 03:09:09,195 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 03:09:09,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=129, Invalid=799, Unknown=2, NotChecked=0, Total=930 [2021-11-23 03:09:09,198 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:09,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-11-23 03:09:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 03:09:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-11-23 03:09:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:09:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-23 03:09:09,207 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2021-11-23 03:09:09,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:09,208 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-23 03:09:09,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:09:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-23 03:09:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 03:09:09,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:09,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:09,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:09,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-23 03:09:09,430 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:09,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1886657850, now seen corresponding path program 2 times [2021-11-23 03:09:09,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:09,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482828828] [2021-11-23 03:09:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:09,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:09,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:09,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553462773] [2021-11-23 03:09:09,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:09:09,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:09,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:09,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:09,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:09:09,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:09:09,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:09:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:09:09,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:09,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:09:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:09:09,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:09,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482828828] [2021-11-23 03:09:09,760 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:09,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553462773] [2021-11-23 03:09:09,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553462773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:09:09,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1253173505] [2021-11-23 03:09:09,764 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:09:09,765 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:09:09,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:09:09,765 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:09:09,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:09:09,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:09,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:09,917 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:09:09,917 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 [2021-11-23 03:09:09,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:09,947 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 [2021-11-23 03:09:09,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:09,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:09,988 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 [2021-11-23 03:09:10,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:10,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:10,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:10,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:10,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:10,245 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:09:10,246 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 [2021-11-23 03:09:10,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:10,408 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:09:10,409 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 [2021-11-23 03:09:10,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:10,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:10,798 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:09:10,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 986 treesize of output 628 [2021-11-23 03:09:10,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:10,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,196 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:11,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 71 [2021-11-23 03:09:11,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:11,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:11,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,445 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 93 [2021-11-23 03:09:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:11,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 117 [2021-11-23 03:09:11,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:11,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 116 [2021-11-23 03:09:11,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:11,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 94 [2021-11-23 03:09:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:11,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 94 [2021-11-23 03:09:11,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:11,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:11,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:11,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:11,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 51 [2021-11-23 03:09:11,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:11,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:12,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:12,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 40 [2021-11-23 03:09:12,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:12,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:12,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:12,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:12,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:12,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:12,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:12,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:09:12,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 885 treesize of output 670 [2021-11-23 03:09:12,749 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:09:12,789 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:09:13,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '601#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:09:13,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:09:13,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:09:13,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 03:09:13,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543945019] [2021-11-23 03:09:13,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:09:13,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:09:13,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:13,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:09:13,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:09:13,908 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:09:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:14,046 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-11-23 03:09:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:09:14,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-11-23 03:09:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:14,048 INFO L225 Difference]: With dead ends: 35 [2021-11-23 03:09:14,048 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 03:09:14,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:09:14,050 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:14,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 51 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:09:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 03:09:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2021-11-23 03:09:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:09:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-23 03:09:14,056 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 19 [2021-11-23 03:09:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:14,056 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-23 03:09:14,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:09:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-23 03:09:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 03:09:14,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:14,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:14,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:14,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:14,274 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:14,274 INFO L85 PathProgramCache]: Analyzing trace with hash 293090666, now seen corresponding path program 3 times [2021-11-23 03:09:14,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:14,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631858271] [2021-11-23 03:09:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:14,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:14,311 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:14,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885227590] [2021-11-23 03:09:14,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:09:14,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:14,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:14,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:09:14,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:09:14,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:09:14,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:09:14,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:14,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:09:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:09:14,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631858271] [2021-11-23 03:09:14,547 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885227590] [2021-11-23 03:09:14,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885227590] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:09:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [973563297] [2021-11-23 03:09:14,559 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:09:14,559 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:09:14,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:09:14,560 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:09:14,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:09:14,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:14,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:14,734 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-23 03:09:14,735 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 [2021-11-23 03:09:14,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:14,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:14,865 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:09:14,866 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 [2021-11-23 03:09:14,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:14,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:14,923 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 [2021-11-23 03:09:15,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:15,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:15,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:15,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:15,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:15,171 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:09:15,172 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 [2021-11-23 03:09:15,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:15,343 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:09:15,343 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 [2021-11-23 03:09:15,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:15,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:15,906 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:09:15,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 986 treesize of output 628 [2021-11-23 03:09:16,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,071 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:16,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 93 [2021-11-23 03:09:16,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:16,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:16,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 93 [2021-11-23 03:09:16,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:16,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2021-11-23 03:09:16,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:16,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 80 [2021-11-23 03:09:16,446 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:16,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:16,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,543 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:16,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 103 [2021-11-23 03:09:16,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:16,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 80 [2021-11-23 03:09:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2021-11-23 03:09:16,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:16,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 374 treesize of output 273 [2021-11-23 03:09:16,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:16,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:16,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 388 treesize of output 287 [2021-11-23 03:09:16,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:16,934 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 214 treesize of output 145 [2021-11-23 03:09:16,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:16,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:17,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:17,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:17,153 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:09:17,186 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:09:18,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '812#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:09:18,497 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:09:18,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:09:18,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 03:09:18,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239137970] [2021-11-23 03:09:18,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:09:18,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:09:18,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:18,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:09:18,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:09:18,500 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:09:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:18,614 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-23 03:09:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:09:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-11-23 03:09:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:18,615 INFO L225 Difference]: With dead ends: 24 [2021-11-23 03:09:18,615 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 03:09:18,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:09:18,617 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:18,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:09:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 03:09:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 03:09:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:09:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-23 03:09:18,623 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2021-11-23 03:09:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:18,623 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-23 03:09:18,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:09:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-23 03:09:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:09:18,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:18,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:18,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:18,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:18,850 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:18,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:18,850 INFO L85 PathProgramCache]: Analyzing trace with hash 495640602, now seen corresponding path program 4 times [2021-11-23 03:09:18,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:18,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570355752] [2021-11-23 03:09:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:18,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:18,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:18,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804141295] [2021-11-23 03:09:18,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:09:18,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:18,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:18,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:18,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:09:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:19,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 03:09:19,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:19,033 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 [2021-11-23 03:09:19,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 03:09:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:19,148 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 [2021-11-23 03:09:19,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:19,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:19,932 INFO L354 Elim1Store]: treesize reduction 581, result has 16.5 percent of original size [2021-11-23 03:09:19,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 240 treesize of output 239 [2021-11-23 03:09:21,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:21,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:21,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:21,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:21,657 INFO L354 Elim1Store]: treesize reduction 52, result has 23.5 percent of original size [2021-11-23 03:09:21,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 5 case distinctions, treesize of input 477 treesize of output 376 [2021-11-23 03:09:23,301 INFO L354 Elim1Store]: treesize reduction 101, result has 21.7 percent of original size [2021-11-23 03:09:23,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 175 treesize of output 129 [2021-11-23 03:09:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:23,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:09:30,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:30,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570355752] [2021-11-23 03:09:30,254 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:30,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804141295] [2021-11-23 03:09:30,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804141295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:09:30,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431421770] [2021-11-23 03:09:30,258 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:09:30,258 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:09:30,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:09:30,259 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:09:30,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:09:30,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,381 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:09:30,381 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 [2021-11-23 03:09:30,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,402 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 [2021-11-23 03:09:30,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,474 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 [2021-11-23 03:09:30,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:30,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:30,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:30,713 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:09:30,713 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 [2021-11-23 03:09:30,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:30,881 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:09:30,882 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 [2021-11-23 03:09:30,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:30,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:31,328 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:09:31,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 984 treesize of output 626 [2021-11-23 03:09:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:31,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 70 [2021-11-23 03:09:31,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:31,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:31,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:31,631 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:31,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 93 [2021-11-23 03:09:31,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:31,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:31,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 114 [2021-11-23 03:09:31,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:31,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:31,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:31,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:31,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 114 [2021-11-23 03:09:31,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:32,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:32,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:32,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 92 [2021-11-23 03:09:32,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:32,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 58 [2021-11-23 03:09:32,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:32,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:09:32,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 103 [2021-11-23 03:09:32,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,464 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:32,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 103 [2021-11-23 03:09:32,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:32,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 103 [2021-11-23 03:09:32,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:32,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:32,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:32,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:32,673 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:32,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 557 treesize of output 380 [2021-11-23 03:09:32,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:32,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:32,931 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:09:32,962 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:09:34,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '999#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:09:34,880 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:09:34,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:09:34,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-23 03:09:34,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764450983] [2021-11-23 03:09:34,880 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:09:34,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:09:34,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:09:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-11-23 03:09:34,882 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:09:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:35,143 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-23 03:09:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:09:35,145 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-23 03:09:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:35,147 INFO L225 Difference]: With dead ends: 38 [2021-11-23 03:09:35,147 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 03:09:35,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:09:35,149 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:35,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2021-11-23 03:09:35,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 03:09:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-23 03:09:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:09:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-23 03:09:35,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2021-11-23 03:09:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:35,159 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-23 03:09:35,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:09:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-23 03:09:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:09:35,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:35,161 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:35,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:35,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:35,370 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1815245974, now seen corresponding path program 5 times [2021-11-23 03:09:35,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:35,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435504948] [2021-11-23 03:09:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:35,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:35,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:35,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440930213] [2021-11-23 03:09:35,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:09:35,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:35,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:35,401 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:35,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:09:35,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:09:35,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:09:35,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:09:35,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:35,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:09:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:09:35,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:35,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435504948] [2021-11-23 03:09:35,775 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:35,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440930213] [2021-11-23 03:09:35,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440930213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:09:35,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1157504917] [2021-11-23 03:09:35,778 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:09:35,778 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:09:35,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:09:35,779 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:09:35,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:09:35,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:35,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:35,920 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:09:35,920 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 [2021-11-23 03:09:35,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:35,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:35,942 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 [2021-11-23 03:09:35,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:35,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:09:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:36,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:36,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:36,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:36,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:36,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:36,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:36,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:36,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:36,201 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 03:09:36,201 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 [2021-11-23 03:09:36,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:36,332 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:09:36,332 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 [2021-11-23 03:09:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:36,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,040 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:09:37,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 984 treesize of output 626 [2021-11-23 03:09:37,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:09:37,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 121 [2021-11-23 03:09:37,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:37,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:37,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:37,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,496 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:37,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 94 [2021-11-23 03:09:37,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:37,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 118 [2021-11-23 03:09:37,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 73 [2021-11-23 03:09:37,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:37,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 129 [2021-11-23 03:09:37,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:37,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 78 [2021-11-23 03:09:37,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:37,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,750 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:37,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 108 [2021-11-23 03:09:37,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 96 [2021-11-23 03:09:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:37,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 59 [2021-11-23 03:09:38,185 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:09:38,221 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:09:39,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1248#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:09:39,538 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:09:39,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:09:39,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-23 03:09:39,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619439026] [2021-11-23 03:09:39,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:09:39,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:09:39,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:39,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:09:39,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:09:39,542 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:09:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:39,720 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-11-23 03:09:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:09:39,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-23 03:09:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:39,722 INFO L225 Difference]: With dead ends: 53 [2021-11-23 03:09:39,722 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 03:09:39,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-11-23 03:09:39,724 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:39,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 51 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:09:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 03:09:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-11-23 03:09:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:09:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-23 03:09:39,736 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 21 [2021-11-23 03:09:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:39,736 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-23 03:09:39,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:09:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-23 03:09:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:09:39,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:39,738 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:39,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:39,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 03:09:39,958 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:39,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:39,958 INFO L85 PathProgramCache]: Analyzing trace with hash 323778874, now seen corresponding path program 6 times [2021-11-23 03:09:39,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:39,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146468500] [2021-11-23 03:09:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:39,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:39,976 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:39,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764796251] [2021-11-23 03:09:39,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:09:39,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:39,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:39,978 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:39,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:09:40,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:09:40,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:09:40,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:09:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:40,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:09:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:09:40,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:40,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146468500] [2021-11-23 03:09:40,216 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:40,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764796251] [2021-11-23 03:09:40,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764796251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:09:40,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1844783483] [2021-11-23 03:09:40,219 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:09:40,219 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:09:40,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:09:40,220 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:09:40,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:09:40,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:40,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:40,360 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-23 03:09:40,360 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 [2021-11-23 03:09:40,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:40,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:40,494 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:09:40,494 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 [2021-11-23 03:09:40,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:40,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:40,537 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 [2021-11-23 03:09:40,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:40,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:40,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:40,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:40,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:40,774 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:09:40,775 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 [2021-11-23 03:09:40,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:09:40,934 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:09:40,935 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 [2021-11-23 03:09:41,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:41,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:41,529 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:09:41,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 984 treesize of output 626 [2021-11-23 03:09:41,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:41,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:41,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:41,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:09:41,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 143 [2021-11-23 03:09:41,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:41,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:09:42,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 57 [2021-11-23 03:09:42,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,241 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:09:42,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 164 treesize of output 80 [2021-11-23 03:09:42,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 57 [2021-11-23 03:09:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 299 treesize of output 267 [2021-11-23 03:09:42,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 43 [2021-11-23 03:09:42,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:09:42,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 66 [2021-11-23 03:09:42,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:42,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 66 [2021-11-23 03:09:42,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:09:42,916 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:09:42,947 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:09:44,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1533#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:09:44,111 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:09:44,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:09:44,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-23 03:09:44,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898292952] [2021-11-23 03:09:44,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:09:44,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:09:44,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:44,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:09:44,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:09:44,114 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:09:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:44,278 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-11-23 03:09:44,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:09:44,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-23 03:09:44,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:44,280 INFO L225 Difference]: With dead ends: 45 [2021-11-23 03:09:44,280 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 03:09:44,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-11-23 03:09:44,282 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:44,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 67 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:09:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 03:09:44,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-11-23 03:09:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:09:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-23 03:09:44,296 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 21 [2021-11-23 03:09:44,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:44,296 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-23 03:09:44,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:09:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-23 03:09:44,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:09:44,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:44,298 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:44,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:44,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:44,510 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:44,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1446975050, now seen corresponding path program 7 times [2021-11-23 03:09:44,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:44,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791819668] [2021-11-23 03:09:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:44,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:44,542 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:44,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64579296] [2021-11-23 03:09:44,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:09:44,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:44,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:44,544 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:44,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:09:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 03:09:44,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:44,739 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 [2021-11-23 03:09:44,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 03:09:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:44,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:44,854 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 57 treesize of output 45 [2021-11-23 03:09:44,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:44,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:44,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:44,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:44,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:44,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:44,953 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 [2021-11-23 03:09:45,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:45,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:45,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:45,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:45,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:46,066 INFO L354 Elim1Store]: treesize reduction 760, result has 20.1 percent of original size [2021-11-23 03:09:46,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 258 treesize of output 321 [2021-11-23 03:09:49,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:09:49,689 INFO L354 Elim1Store]: treesize reduction 122, result has 33.3 percent of original size [2021-11-23 03:09:49,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 14 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 511 treesize of output 414 [2021-11-23 03:10:03,301 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:10:03,301 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 172 treesize of output 76 [2021-11-23 03:10:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:03,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:10:13,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:13,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791819668] [2021-11-23 03:10:13,709 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:10:13,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64579296] [2021-11-23 03:10:13,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64579296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:10:13,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1557217561] [2021-11-23 03:10:13,713 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:10:13,714 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:10:13,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:10:13,714 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:10:13,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:10:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:13,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:13,857 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-23 03:10:13,858 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 [2021-11-23 03:10:13,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:13,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:13,993 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:10:13,994 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 [2021-11-23 03:10:14,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:14,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:14,029 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 [2021-11-23 03:10:14,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:14,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:14,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:14,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:14,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:14,208 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:10:14,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-11-23 03:10:14,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:14,339 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:10:14,339 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 [2021-11-23 03:10:14,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:14,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:14,804 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:10:14,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 493 treesize of output 494 [2021-11-23 03:10:14,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:14,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:14,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:10:14,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 98 [2021-11-23 03:10:14,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:15,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:15,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:15,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 48 [2021-11-23 03:10:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:15,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:15,161 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:10:15,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 94 [2021-11-23 03:10:15,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:15,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:15,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:15,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:10:15,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 536 treesize of output 460 [2021-11-23 03:10:15,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:15,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 43 [2021-11-23 03:10:15,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:15,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:15,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:15,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:15,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 61 [2021-11-23 03:10:15,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:15,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 43 [2021-11-23 03:10:15,507 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:10:15,538 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:10:17,777 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1792#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:10:17,777 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:10:17,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:10:17,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-23 03:10:17,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594068324] [2021-11-23 03:10:17,778 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:10:17,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:10:17,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:17,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:10:17,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1115, Unknown=4, NotChecked=0, Total=1260 [2021-11-23 03:10:17,780 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:10:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:19,522 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-11-23 03:10:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:10:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-23 03:10:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:19,523 INFO L225 Difference]: With dead ends: 58 [2021-11-23 03:10:19,524 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 03:10:19,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=215, Invalid=1673, Unknown=4, NotChecked=0, Total=1892 [2021-11-23 03:10:19,526 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:19,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 117 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 247 Invalid, 0 Unknown, 55 Unchecked, 0.6s Time] [2021-11-23 03:10:19,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 03:10:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-11-23 03:10:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:10:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-23 03:10:19,541 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 22 [2021-11-23 03:10:19,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:19,541 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-23 03:10:19,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:10:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-23 03:10:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:10:19,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:19,543 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:19,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-23 03:10:19,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:10:19,746 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:10:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:19,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1906318138, now seen corresponding path program 8 times [2021-11-23 03:10:19,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:19,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831543500] [2021-11-23 03:10:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:19,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:19,763 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:10:19,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731333038] [2021-11-23 03:10:19,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:10:19,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:10:19,765 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:10:19,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:10:19,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:10:19,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:10:19,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:10:19,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:10:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:20,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:10:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:10:20,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:20,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831543500] [2021-11-23 03:10:20,184 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:10:20,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731333038] [2021-11-23 03:10:20,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731333038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:10:20,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301086071] [2021-11-23 03:10:20,187 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:10:20,188 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:10:20,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:10:20,188 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:10:20,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:10:20,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:20,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:20,309 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:10:20,310 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 [2021-11-23 03:10:20,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:20,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:20,333 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 [2021-11-23 03:10:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:20,366 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 [2021-11-23 03:10:20,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:20,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:20,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:20,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:20,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:20,540 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:10:20,541 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 [2021-11-23 03:10:20,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:20,659 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:10:20,659 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 [2021-11-23 03:10:20,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:20,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,070 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:10:21,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 984 treesize of output 626 [2021-11-23 03:10:21,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:21,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:21,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,381 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:10:21,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 90 [2021-11-23 03:10:21,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:21,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,538 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:10:21,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 143 treesize of output 104 [2021-11-23 03:10:21,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:21,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 104 [2021-11-23 03:10:21,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:21,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 104 [2021-11-23 03:10:21,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 66 [2021-11-23 03:10:21,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 66 [2021-11-23 03:10:21,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:21,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 89 [2021-11-23 03:10:21,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:21,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 44 [2021-11-23 03:10:21,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:21,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:21,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:21,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:22,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:10:22,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 677 treesize of output 429 [2021-11-23 03:10:22,183 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:10:22,210 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:10:23,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2126#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:10:23,262 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:10:23,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:10:23,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-23 03:10:23,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896824229] [2021-11-23 03:10:23,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:10:23,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:10:23,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:23,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:10:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:10:23,265 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:10:23,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:23,578 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-11-23 03:10:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:10:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-11-23 03:10:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:23,582 INFO L225 Difference]: With dead ends: 76 [2021-11-23 03:10:23,582 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 03:10:23,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 03:10:23,584 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:23,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 90 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:10:23,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 03:10:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2021-11-23 03:10:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:10:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-11-23 03:10:23,600 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 23 [2021-11-23 03:10:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:23,600 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-11-23 03:10:23,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:10:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-11-23 03:10:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:10:23,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:23,602 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:23,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:10:23,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 03:10:23,810 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:10:23,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:23,810 INFO L85 PathProgramCache]: Analyzing trace with hash -503388310, now seen corresponding path program 9 times [2021-11-23 03:10:23,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:23,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868402922] [2021-11-23 03:10:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:23,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:23,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:10:23,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132850423] [2021-11-23 03:10:23,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:10:23,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:23,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:10:23,830 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:10:23,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:10:23,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:10:23,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:10:23,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:10:23,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:10:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:24,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:10:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:10:24,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:24,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868402922] [2021-11-23 03:10:24,163 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:10:24,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132850423] [2021-11-23 03:10:24,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132850423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:10:24,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619503665] [2021-11-23 03:10:24,166 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:10:24,167 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:10:24,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:10:24,167 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:10:24,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:10:24,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,287 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:10:24,287 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 [2021-11-23 03:10:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,302 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 [2021-11-23 03:10:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,333 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 [2021-11-23 03:10:24,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:24,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:24,466 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 03:10:24,466 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 [2021-11-23 03:10:24,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:24,565 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:10:24,566 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 [2021-11-23 03:10:24,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:24,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,000 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:10:25,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 986 treesize of output 628 [2021-11-23 03:10:25,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:25,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 93 [2021-11-23 03:10:25,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,159 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:10:25,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 93 [2021-11-23 03:10:25,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:25,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2021-11-23 03:10:25,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:10:25,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 430 treesize of output 331 [2021-11-23 03:10:25,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:25,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,539 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:10:25,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 478 treesize of output 364 [2021-11-23 03:10:25,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 430 treesize of output 331 [2021-11-23 03:10:25,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:25,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 164 [2021-11-23 03:10:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 61 [2021-11-23 03:10:25,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 59 [2021-11-23 03:10:25,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:25,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:25,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 135 [2021-11-23 03:10:25,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:25,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:25,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 59 [2021-11-23 03:10:25,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:25,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 131 [2021-11-23 03:10:25,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 79 [2021-11-23 03:10:25,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:25,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 140 [2021-11-23 03:10:26,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:26,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 69 [2021-11-23 03:10:26,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:26,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 107 [2021-11-23 03:10:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:26,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 51 [2021-11-23 03:10:26,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:10:26,324 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:10:26,355 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:10:27,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2493#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:10:27,739 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:10:27,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:10:27,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-23 03:10:27,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521200589] [2021-11-23 03:10:27,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:10:27,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:10:27,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:27,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:10:27,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:10:27,741 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:10:27,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:27,985 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-11-23 03:10:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:10:27,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-11-23 03:10:27,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:27,986 INFO L225 Difference]: With dead ends: 67 [2021-11-23 03:10:27,987 INFO L226 Difference]: Without dead ends: 64 [2021-11-23 03:10:27,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 03:10:27,990 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:27,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 101 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:10:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-23 03:10:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2021-11-23 03:10:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:10:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-11-23 03:10:28,013 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 23 [2021-11-23 03:10:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:28,014 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-11-23 03:10:28,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:10:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-11-23 03:10:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:10:28,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:28,016 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:28,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:10:28,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:28,222 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:10:28,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:28,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1574596122, now seen corresponding path program 10 times [2021-11-23 03:10:28,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:28,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527324676] [2021-11-23 03:10:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:28,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:28,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:10:28,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887858683] [2021-11-23 03:10:28,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:10:28,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:10:28,241 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:10:28,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:10:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:28,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 03:10:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:10:28,550 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 [2021-11-23 03:10:28,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 03:10:28,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:10:28,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,722 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 [2021-11-23 03:10:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:28,822 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 99 treesize of output 99 [2021-11-23 03:10:29,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:29,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:30,067 INFO L354 Elim1Store]: treesize reduction 954, result has 20.9 percent of original size [2021-11-23 03:10:30,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 11 select indices, 11 select index equivalence classes, 13 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 31 case distinctions, treesize of input 276 treesize of output 388 [2021-11-23 03:10:35,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:35,976 INFO L354 Elim1Store]: treesize reduction 164, result has 34.1 percent of original size [2021-11-23 03:10:35,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 15 case distinctions, treesize of input 740 treesize of output 591 [2021-11-23 03:11:18,126 INFO L354 Elim1Store]: treesize reduction 96, result has 33.8 percent of original size [2021-11-23 03:11:18,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 825 treesize of output 497 [2021-11-23 03:11:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:19,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:11:38,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:38,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527324676] [2021-11-23 03:11:38,789 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:11:38,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887858683] [2021-11-23 03:11:38,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887858683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:11:38,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955869995] [2021-11-23 03:11:38,791 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:11:38,792 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:11:38,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:11:38,792 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:11:38,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:11:38,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:38,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:38,916 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:11:38,916 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 [2021-11-23 03:11:38,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:38,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:38,933 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 [2021-11-23 03:11:38,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:38,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:38,969 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 [2021-11-23 03:11:39,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:39,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:39,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:39,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:39,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:39,142 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:11:39,142 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 [2021-11-23 03:11:39,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:39,261 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:11:39,261 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 [2021-11-23 03:11:39,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:39,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:39,803 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:11:39,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 984 treesize of output 626 [2021-11-23 03:11:39,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:39,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:39,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:11:39,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 143 [2021-11-23 03:11:39,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:40,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:11:40,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 149 treesize of output 80 [2021-11-23 03:11:40,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:40,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:40,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:40,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:40,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:40,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,429 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:11:40,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 187 treesize of output 103 [2021-11-23 03:11:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 80 [2021-11-23 03:11:40,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,646 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:11:40,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 97 [2021-11-23 03:11:40,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:40,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 360 treesize of output 313 [2021-11-23 03:11:40,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:40,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 205 [2021-11-23 03:11:40,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:40,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:40,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:11:40,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 81 [2021-11-23 03:11:40,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:40,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 81 [2021-11-23 03:11:40,947 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:11:40,973 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:11:43,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2821#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:11:43,914 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:11:43,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:11:43,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-23 03:11:43,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108954042] [2021-11-23 03:11:43,915 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:11:43,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:11:43,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:43,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:11:43,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1326, Unknown=3, NotChecked=0, Total=1482 [2021-11-23 03:11:43,917 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:11:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:53,152 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-11-23 03:11:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 03:11:53,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-23 03:11:53,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:53,154 INFO L225 Difference]: With dead ends: 82 [2021-11-23 03:11:53,154 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 03:11:53,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=182, Invalid=1617, Unknown=7, NotChecked=0, Total=1806 [2021-11-23 03:11:53,156 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:53,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 153 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 134 Unchecked, 0.3s Time] [2021-11-23 03:11:53,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 03:11:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2021-11-23 03:11:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 03:11:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-11-23 03:11:53,176 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 24 [2021-11-23 03:11:53,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:53,177 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-11-23 03:11:53,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:11:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-11-23 03:11:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:11:53,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:53,179 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:53,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:11:53,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 03:11:53,402 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:53,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1687750362, now seen corresponding path program 1 times [2021-11-23 03:11:53,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:53,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346043483] [2021-11-23 03:11:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:53,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:53,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:11:53,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707837510] [2021-11-23 03:11:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:53,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:53,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:53,442 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:11:53,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:11:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 03:11:53,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:53,608 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 [2021-11-23 03:11:53,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 03:11:53,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:53,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:53,680 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 57 treesize of output 45 [2021-11-23 03:11:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:54,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:54,328 INFO L354 Elim1Store]: treesize reduction 582, result has 18.3 percent of original size [2021-11-23 03:11:54,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 250 treesize of output 256 [2021-11-23 03:11:54,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:54,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:54,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:54,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:55,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:55,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:55,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:55,242 INFO L354 Elim1Store]: treesize reduction 60, result has 10.4 percent of original size [2021-11-23 03:11:55,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 291 treesize of output 203 [2021-11-23 03:11:57,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:57,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:57,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:58,159 INFO L354 Elim1Store]: treesize reduction 967, result has 14.0 percent of original size [2021-11-23 03:11:58,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 312 treesize of output 312 [2021-11-23 03:11:58,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:58,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:58,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:11:59,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:00,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:00,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:00,851 INFO L354 Elim1Store]: treesize reduction 62, result has 54.7 percent of original size [2021-11-23 03:12:00,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 672 treesize of output 480 [2021-11-23 03:12:04,878 INFO L354 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2021-11-23 03:12:04,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 156 treesize of output 131 [2021-11-23 03:12:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:05,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:12:22,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:22,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346043483] [2021-11-23 03:12:22,702 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:12:22,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707837510] [2021-11-23 03:12:22,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707837510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:12:22,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1107076514] [2021-11-23 03:12:22,705 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:12:22,706 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:12:22,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:12:22,706 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:12:22,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:12:22,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:22,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:22,852 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-23 03:12:22,852 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 [2021-11-23 03:12:22,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:22,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:22,963 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:12:22,963 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 [2021-11-23 03:12:23,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:23,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:23,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:12:23,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:23,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:23,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:23,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:23,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:23,178 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:12:23,179 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 [2021-11-23 03:12:23,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:23,460 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:12:23,461 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 [2021-11-23 03:12:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:23,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:23,897 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:12:23,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 986 treesize of output 628 [2021-11-23 03:12:24,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:24,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 27 [2021-11-23 03:12:24,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:24,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:24,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:24,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:24,151 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:12:24,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 71 [2021-11-23 03:12:24,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:24,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:24,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:24,307 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:12:24,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 167 treesize of output 112 [2021-11-23 03:12:24,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:24,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:24,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 108 [2021-11-23 03:12:24,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:24,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 50 [2021-11-23 03:12:24,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:24,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:24,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:24,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:24,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:24,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:24,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:12:24,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 57 [2021-11-23 03:12:24,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:24,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:24,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 57 [2021-11-23 03:12:24,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:24,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:24,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:24,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:25,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:25,655 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:12:25,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 984 treesize of output 626 [2021-11-23 03:12:25,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:25,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:12:25,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 121 [2021-11-23 03:12:25,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:25,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:26,049 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:12:26,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 89 [2021-11-23 03:12:26,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:26,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 109 [2021-11-23 03:12:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:26,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2021-11-23 03:12:26,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:26,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 57 [2021-11-23 03:12:26,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:26,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:26,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:26,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:26,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 57 [2021-11-23 03:12:26,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:26,699 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:12:26,726 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:12:28,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3184#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:12:28,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:12:28,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:12:28,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-23 03:12:28,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328193328] [2021-11-23 03:12:28,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:12:28,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:12:28,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:12:28,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1054, Unknown=2, NotChecked=0, Total=1190 [2021-11-23 03:12:28,568 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 18 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:12:28,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:28,922 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-11-23 03:12:28,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:12:28,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-11-23 03:12:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:28,924 INFO L225 Difference]: With dead ends: 80 [2021-11-23 03:12:28,924 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 03:12:28,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=149, Invalid=1181, Unknown=2, NotChecked=0, Total=1332 [2021-11-23 03:12:28,926 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:28,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 90 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2021-11-23 03:12:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 03:12:28,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2021-11-23 03:12:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 03:12:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-11-23 03:12:28,946 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 26 [2021-11-23 03:12:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:28,946 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-11-23 03:12:28,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:12:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-11-23 03:12:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:12:28,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:28,949 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:29,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:12:29,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 03:12:29,174 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:29,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:29,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1567604074, now seen corresponding path program 11 times [2021-11-23 03:12:29,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:29,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092256910] [2021-11-23 03:12:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:29,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:29,204 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:12:29,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712949613] [2021-11-23 03:12:29,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:12:29,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:29,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:29,217 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:29,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 03:12:29,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:12:29,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:12:29,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:12:29,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:29,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:12:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:12:29,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:29,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092256910] [2021-11-23 03:12:29,743 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:12:29,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712949613] [2021-11-23 03:12:29,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712949613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:12:29,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518948240] [2021-11-23 03:12:29,746 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:12:29,746 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:12:29,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:12:29,747 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:12:29,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:12:29,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:29,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:29,868 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:12:29,869 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 [2021-11-23 03:12:29,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:29,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:29,884 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 [2021-11-23 03:12:29,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:29,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:29,926 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 [2021-11-23 03:12:29,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:29,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:29,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:29,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:29,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:30,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:30,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:30,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:30,051 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 03:12:30,051 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 [2021-11-23 03:12:30,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:30,135 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:12:30,135 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 [2021-11-23 03:12:30,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:30,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:30,709 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:12:30,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 986 treesize of output 628 [2021-11-23 03:12:30,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:30,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:30,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:30,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:30,905 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:12:30,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 66 [2021-11-23 03:12:30,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:31,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:31,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 69 [2021-11-23 03:12:31,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:31,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,120 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:12:31,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 69 [2021-11-23 03:12:31,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:31,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:31,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2021-11-23 03:12:31,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:31,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:31,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:31,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 51 [2021-11-23 03:12:31,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:31,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 66 [2021-11-23 03:12:31,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:31,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 86 [2021-11-23 03:12:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:31,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 113 [2021-11-23 03:12:31,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 77 [2021-11-23 03:12:31,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 62 [2021-11-23 03:12:31,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:31,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 55 [2021-11-23 03:12:31,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 40 [2021-11-23 03:12:31,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:31,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:12:31,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 1262 treesize of output 883 [2021-11-23 03:12:32,188 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:12:32,220 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:12:33,560 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3582#(and (<= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 |#NULL.base|) (<= ~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|) (<= 0 |ULTIMATE.start_main_~#array2~0#1.offset|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.offset|) (<= |#NULL.base| 0) (= |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|))' at error location [2021-11-23 03:12:33,561 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:12:33,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:12:33,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-23 03:12:33,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851173392] [2021-11-23 03:12:33,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:12:33,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:12:33,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:12:33,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:12:33,563 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:12:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:34,295 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-11-23 03:12:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:12:34,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-23 03:12:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:34,297 INFO L225 Difference]: With dead ends: 106 [2021-11-23 03:12:34,297 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 03:12:34,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=347, Invalid=1723, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 03:12:34,300 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:34,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 96 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:12:34,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 03:12:34,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-11-23 03:12:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 03:12:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2021-11-23 03:12:34,325 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 25 [2021-11-23 03:12:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:34,325 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2021-11-23 03:12:34,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:12:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2021-11-23 03:12:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:12:34,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:34,327 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:34,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:12:34,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 03:12:34,534 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:34,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:34,535 INFO L85 PathProgramCache]: Analyzing trace with hash -118851782, now seen corresponding path program 12 times [2021-11-23 03:12:34,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:34,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960890577] [2021-11-23 03:12:34,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:34,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:34,560 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:12:34,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894102541] [2021-11-23 03:12:34,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:12:34,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:34,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:34,562 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:34,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 03:12:34,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:12:34,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:12:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:12:34,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:34,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:12:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:12:35,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:35,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960890577] [2021-11-23 03:12:35,022 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:12:35,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894102541] [2021-11-23 03:12:35,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894102541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:12:35,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94906426] [2021-11-23 03:12:35,024 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:12:35,024 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:12:35,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:12:35,025 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:12:35,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:12:35,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:35,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:35,149 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:12:35,150 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 [2021-11-23 03:12:35,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:35,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:35,168 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 [2021-11-23 03:12:35,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:35,224 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 [2021-11-23 03:12:35,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:35,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:35,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:35,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:35,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:35,432 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 03:12:35,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-11-23 03:12:35,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:35,630 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:12:35,631 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 [2021-11-23 03:12:35,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:35,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:36,115 INFO L354 Elim1Store]: treesize reduction 181, result has 50.9 percent of original size [2021-11-23 03:12:36,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 493 treesize of output 494 [2021-11-23 03:12:36,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:36,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:36,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 48 [2021-11-23 03:12:36,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:36,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:36,298 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:12:36,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 71 [2021-11-23 03:12:36,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:36,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:36,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:36,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:36,439 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:12:36,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 89 [2021-11-23 03:12:36,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:36,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:36,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:12:36,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 731 treesize of output 623 [2021-11-23 03:12:36,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:36,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 82 [2021-11-23 03:12:36,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:36,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 51 [2021-11-23 03:12:36,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:36,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:36,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:36,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:12:36,822 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:12:36,849 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:12:37,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4051#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~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 [2021-11-23 03:12:37,987 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:12:37,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:12:37,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-23 03:12:37,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548630609] [2021-11-23 03:12:37,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:12:37,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:12:37,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:37,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:12:37,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:12:37,989 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:12:38,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:38,709 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-11-23 03:12:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:12:38,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-23 03:12:38,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:38,711 INFO L225 Difference]: With dead ends: 96 [2021-11-23 03:12:38,711 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 03:12:38,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 03:12:38,713 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:38,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 192 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:12:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 03:12:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2021-11-23 03:12:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 03:12:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2021-11-23 03:12:38,739 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 25 [2021-11-23 03:12:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:38,740 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2021-11-23 03:12:38,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:12:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2021-11-23 03:12:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:12:38,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:38,742 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:38,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 03:12:38,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 03:12:38,954 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash 610326602, now seen corresponding path program 13 times [2021-11-23 03:12:38,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:38,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748538558] [2021-11-23 03:12:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:38,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:38,964 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:12:38,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971219839] [2021-11-23 03:12:38,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:12:38,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:38,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:38,966 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:38,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83faecf7-9655-462d-8b39-b0c6f7d0a78c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 03:12:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:39,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-23 03:12:39,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:39,321 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 [2021-11-23 03:12:39,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 03:12:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,442 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 [2021-11-23 03:12:39,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,541 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 [2021-11-23 03:12:39,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,690 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 [2021-11-23 03:12:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:39,865 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 111 treesize of output 117 [2021-11-23 03:12:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:41,634 INFO L354 Elim1Store]: treesize reduction 1148, result has 21.4 percent of original size [2021-11-23 03:12:41,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 38 case distinctions, treesize of input 294 treesize of output 455 [2021-11-23 03:13:04,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:04,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:05,007 INFO L354 Elim1Store]: treesize reduction 196, result has 38.8 percent of original size [2021-11-23 03:13:05,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 26 disjoint index pairs (out of 105 index pairs), introduced 17 new quantified variables, introduced 24 case distinctions, treesize of input 1228 treesize of output 922 [2021-11-23 03:13:43,982 INFO L354 Elim1Store]: treesize reduction 712, result has 15.3 percent of original size [2021-11-23 03:13:43,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 10 disjoint index pairs (out of 120 index pairs), introduced 21 new quantified variables, introduced 120 case distinctions, treesize of input 566 treesize of output 413 [2021-11-23 03:13:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:49,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:53,384 WARN L227 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)