./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list_flag-2.i --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_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/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_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/list_flag-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/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_bd9c8979-fde8-46c4-906c-934dfb8a7672/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 4547628201bbb61f481f84914c46868091db8c6a3d0c4d8890951b495ae3c7da --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:50:57,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:50:57,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:50:57,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:50:57,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:50:57,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:50:57,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:50:57,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:50:57,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:50:57,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:50:57,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:50:57,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:50:57,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:50:57,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:50:57,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:50:57,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:50:57,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:50:57,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:50:57,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:50:57,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:50:57,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:50:57,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:50:57,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:50:57,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:50:57,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:50:57,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:50:57,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:50:57,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:50:57,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:50:57,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:50:57,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:50:57,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:50:57,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:50:57,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:50:57,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:50:57,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:50:57,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:50:57,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:50:57,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:50:57,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:50:57,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:50:57,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:50:57,341 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:50:57,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:50:57,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:50:57,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:50:57,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:50:57,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:50:57,345 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:50:57,345 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:50:57,345 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:50:57,345 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:50:57,347 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:50:57,347 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:50:57,347 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:50:57,348 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:50:57,348 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:50:57,348 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:50:57,348 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:50:57,349 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:50:57,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:50:57,351 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:50:57,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:50:57,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:50:57,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:50:57,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:50:57,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:50:57,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:50:57,354 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:50:57,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:50:57,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:50:57,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:50:57,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:50:57,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:50:57,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:50:57,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:50:57,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:50:57,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:50:57,357 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:50:57,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:50:57,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:50:57,358 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:50:57,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:50:57,358 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_bd9c8979-fde8-46c4-906c-934dfb8a7672/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4547628201bbb61f481f84914c46868091db8c6a3d0c4d8890951b495ae3c7da [2021-11-23 01:50:57,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:50:57,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:50:57,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:50:57,694 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:50:57,695 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:50:57,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-properties/list_flag-2.i [2021-11-23 01:50:57,773 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/data/373d956e1/6437bb4e76dd420da4d0a0ce46d78d5e/FLAGbd0ed5905 [2021-11-23 01:50:58,363 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:50:58,364 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/sv-benchmarks/c/list-properties/list_flag-2.i [2021-11-23 01:50:58,389 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/data/373d956e1/6437bb4e76dd420da4d0a0ce46d78d5e/FLAGbd0ed5905 [2021-11-23 01:50:58,762 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/data/373d956e1/6437bb4e76dd420da4d0a0ce46d78d5e [2021-11-23 01:50:58,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:50:58,765 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:50:58,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:50:58,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:50:58,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:50:58,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:50:58" (1/1) ... [2021-11-23 01:50:58,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43bffc3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:58, skipping insertion in model container [2021-11-23 01:50:58,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:50:58" (1/1) ... [2021-11-23 01:50:58,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:50:58,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:50:59,171 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_bd9c8979-fde8-46c4-906c-934dfb8a7672/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2021-11-23 01:50:59,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:50:59,182 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:50:59,223 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_bd9c8979-fde8-46c4-906c-934dfb8a7672/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2021-11-23 01:50:59,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:50:59,264 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:50:59,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59 WrapperNode [2021-11-23 01:50:59,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:50:59,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:50:59,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:50:59,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:50:59,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59" (1/1) ... [2021-11-23 01:50:59,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59" (1/1) ... [2021-11-23 01:50:59,346 INFO L137 Inliner]: procedures = 124, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 70 [2021-11-23 01:50:59,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:50:59,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:50:59,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:50:59,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:50:59,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59" (1/1) ... [2021-11-23 01:50:59,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59" (1/1) ... [2021-11-23 01:50:59,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59" (1/1) ... [2021-11-23 01:50:59,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59" (1/1) ... [2021-11-23 01:50:59,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59" (1/1) ... [2021-11-23 01:50:59,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59" (1/1) ... [2021-11-23 01:50:59,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59" (1/1) ... [2021-11-23 01:50:59,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:50:59,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:50:59,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:50:59,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:50:59,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59" (1/1) ... [2021-11-23 01:50:59,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:50:59,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:50:59,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:50:59,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:50:59,456 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-23 01:50:59,457 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-23 01:50:59,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 01:50:59,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 01:50:59,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 01:50:59,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:50:59,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 01:50:59,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 01:50:59,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:50:59,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:50:59,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:50:59,545 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:50:59,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:50:59,575 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-23 01:50:59,700 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:50:59,732 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:50:59,733 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 01:50:59,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:50:59 BoogieIcfgContainer [2021-11-23 01:50:59,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:50:59,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:50:59,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:50:59,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:50:59,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:50:58" (1/3) ... [2021-11-23 01:50:59,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f97380f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:50:59, skipping insertion in model container [2021-11-23 01:50:59,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:50:59" (2/3) ... [2021-11-23 01:50:59,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f97380f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:50:59, skipping insertion in model container [2021-11-23 01:50:59,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:50:59" (3/3) ... [2021-11-23 01:50:59,744 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2021-11-23 01:50:59,750 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:50:59,750 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:50:59,797 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:50:59,804 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 01:50:59,805 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:50:59,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:50:59,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 01:50:59,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:50:59,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:50:59,829 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:50:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:50:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash -111407645, now seen corresponding path program 1 times [2021-11-23 01:50:59,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:50:59,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260604702] [2021-11-23 01:50:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:50:59,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:50:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:00,047 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 01:51:00,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:00,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260604702] [2021-11-23 01:51:00,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260604702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:00,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:00,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:51:00,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469452878] [2021-11-23 01:51:00,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:00,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 01:51:00,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:00,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 01:51:00,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 01:51:00,089 INFO L87 Difference]: Start difference. First operand has 23 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:00,117 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2021-11-23 01:51:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 01:51:00,120 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 01:51:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:00,127 INFO L225 Difference]: With dead ends: 35 [2021-11-23 01:51:00,128 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 01:51:00,131 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 01:51:00,135 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:00,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:51:00,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 01:51:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 01:51:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-23 01:51:00,196 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2021-11-23 01:51:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:00,196 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-23 01:51:00,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-23 01:51:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 01:51:00,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:00,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:00,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:51:00,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash 34120441, now seen corresponding path program 1 times [2021-11-23 01:51:00,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:00,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190384157] [2021-11-23 01:51:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:00,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:00,326 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 01:51:00,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:00,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190384157] [2021-11-23 01:51:00,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190384157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:00,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:00,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:51:00,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010610528] [2021-11-23 01:51:00,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:00,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:51:00,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:00,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:51:00,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:51:00,331 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:00,440 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-11-23 01:51:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:51:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 01:51:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:00,444 INFO L225 Difference]: With dead ends: 39 [2021-11-23 01:51:00,445 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 01:51:00,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:51:00,449 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:00,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 01:51:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-11-23 01:51:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-23 01:51:00,459 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 12 [2021-11-23 01:51:00,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:00,459 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-23 01:51:00,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-23 01:51:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 01:51:00,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:00,463 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:00,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:51:00,464 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:00,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:00,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1521318348, now seen corresponding path program 1 times [2021-11-23 01:51:00,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:00,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126618724] [2021-11-23 01:51:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:00,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:00,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126618724] [2021-11-23 01:51:00,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126618724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:00,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:00,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:51:00,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549509007] [2021-11-23 01:51:00,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:00,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:51:00,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:00,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:51:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:51:00,630 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:00,698 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-11-23 01:51:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:51:00,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 01:51:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:00,700 INFO L225 Difference]: With dead ends: 41 [2021-11-23 01:51:00,700 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 01:51:00,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:51:00,702 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:00,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 49 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:51:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 01:51:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-11-23 01:51:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-23 01:51:00,711 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2021-11-23 01:51:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:00,711 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-23 01:51:00,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-23 01:51:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 01:51:00,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:00,713 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:00,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:51:00,714 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:00,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1529907427, now seen corresponding path program 1 times [2021-11-23 01:51:00,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:00,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185432849] [2021-11-23 01:51:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:00,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:00,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:00,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185432849] [2021-11-23 01:51:00,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185432849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:00,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:00,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:51:00,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260051534] [2021-11-23 01:51:00,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:00,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:51:00,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:00,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:51:00,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:51:00,821 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:00,912 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-23 01:51:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:51:00,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 01:51:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:00,914 INFO L225 Difference]: With dead ends: 39 [2021-11-23 01:51:00,914 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 01:51:00,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:51:00,921 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:00,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 38 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 01:51:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-11-23 01:51:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-23 01:51:00,933 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2021-11-23 01:51:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:00,934 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-23 01:51:00,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-23 01:51:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 01:51:00,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:00,938 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:00,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:51:00,938 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1732445355, now seen corresponding path program 1 times [2021-11-23 01:51:00,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:00,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033380089] [2021-11-23 01:51:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:00,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:01,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:01,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033380089] [2021-11-23 01:51:01,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033380089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:01,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679241202] [2021-11-23 01:51:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:01,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:01,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:01,209 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:01,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:51:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:01,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 01:51:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:01,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:51:01,598 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:51:01,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 01:51:01,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:51:01,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:51:01,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:51:01,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:51:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:01,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-11-23 01:51:01,920 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 01:51:01,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2021-11-23 01:51:02,038 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 01:51:02,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-23 01:51:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:02,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:04,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 436 treesize of output 420 [2021-11-23 01:51:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:05,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679241202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:51:05,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [42868508] [2021-11-23 01:51:05,131 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:51:05,132 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:51:05,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:51:05,143 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:51:05,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:51:05,228 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-23 01:51:05,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-11-23 01:51:05,284 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 01:51:05,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-23 01:51:05,380 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 01:51:05,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-11-23 01:51:05,443 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 01:51:05,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 01:51:05,462 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 94 [2021-11-23 01:51:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:05,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 112 [2021-11-23 01:51:05,491 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 97 [2021-11-23 01:51:05,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:05,586 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 26 treesize of output 14 [2021-11-23 01:51:05,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:05,615 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 33 treesize of output 17 [2021-11-23 01:51:05,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:05,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 50 [2021-11-23 01:51:05,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:51:05,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:51:05,860 INFO L354 Elim1Store]: treesize reduction 144, result has 23.0 percent of original size [2021-11-23 01:51:05,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 295 treesize of output 311 [2021-11-23 01:51:05,912 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 01:51:05,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 274 [2021-11-23 01:51:05,952 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 01:51:05,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 255 [2021-11-23 01:51:06,035 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-23 01:51:06,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 258 treesize of output 269 [2021-11-23 01:51:06,127 INFO L354 Elim1Store]: treesize reduction 112, result has 20.6 percent of original size [2021-11-23 01:51:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 257 treesize of output 277 [2021-11-23 01:51:06,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-23 01:51:06,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 34 [2021-11-23 01:51:06,373 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 64 treesize of output 60 [2021-11-23 01:51:06,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-11-23 01:51:06,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 37 [2021-11-23 01:51:06,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 01:51:06,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-23 01:51:06,455 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 01:51:06,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 124 [2021-11-23 01:51:06,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 119 [2021-11-23 01:51:06,485 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 01:51:06,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 113 [2021-11-23 01:51:06,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 01:51:06,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 01:51:06,617 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 64 treesize of output 60 [2021-11-23 01:51:06,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-11-23 01:51:06,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 37 [2021-11-23 01:51:06,844 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 01:51:06,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 263 [2021-11-23 01:51:06,873 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 01:51:06,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 255 [2021-11-23 01:51:06,904 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-23 01:51:06,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 255 treesize of output 261 [2021-11-23 01:51:07,250 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:51:08,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '454#(and (= 3 (select (select |#memory_int| |ULTIMATE.start_main_~t~0#1.base|) |ULTIMATE.start_main_~t~0#1.offset|)) (not (= |ULTIMATE.start_main_~t~0#1.base| 0)) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 2)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~t~0#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:51:08,828 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:51:08,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:51:08,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2021-11-23 01:51:08,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770113154] [2021-11-23 01:51:08,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:51:08,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 01:51:08,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 01:51:08,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=768, Unknown=3, NotChecked=0, Total=870 [2021-11-23 01:51:08,837 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:08,943 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-23 01:51:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 01:51:08,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 01:51:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:08,944 INFO L225 Difference]: With dead ends: 33 [2021-11-23 01:51:08,944 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 01:51:08,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=105, Invalid=822, Unknown=3, NotChecked=0, Total=930 [2021-11-23 01:51:08,946 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:08,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 64 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2021-11-23 01:51:08,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 01:51:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-11-23 01:51:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-11-23 01:51:08,951 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2021-11-23 01:51:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:08,952 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-11-23 01:51:08,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-11-23 01:51:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 01:51:08,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:08,953 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:08,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:09,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:09,169 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:09,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1288708410, now seen corresponding path program 1 times [2021-11-23 01:51:09,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:09,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977853247] [2021-11-23 01:51:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:09,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:09,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:09,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977853247] [2021-11-23 01:51:09,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977853247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:09,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681962194] [2021-11-23 01:51:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:09,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:09,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:09,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:09,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:51:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:09,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 01:51:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:09,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:51:09,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:51:09,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:51:09,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:51:09,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:51:09,552 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:51:09,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 01:51:09,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:09,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-11-23 01:51:09,743 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 01:51:09,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2021-11-23 01:51:09,843 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 01:51:09,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-23 01:51:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:09,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:09,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 220 treesize of output 212 [2021-11-23 01:51:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:10,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681962194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:51:10,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238092118] [2021-11-23 01:51:10,365 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:51:10,365 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:51:10,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:51:10,366 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:51:10,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:51:10,401 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-23 01:51:10,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-11-23 01:51:10,432 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 01:51:10,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-23 01:51:10,508 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 01:51:10,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-11-23 01:51:10,562 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 01:51:10,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 01:51:10,575 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 94 [2021-11-23 01:51:10,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 112 [2021-11-23 01:51:10,597 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 101 [2021-11-23 01:51:10,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,668 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 37 treesize of output 21 [2021-11-23 01:51:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,687 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 37 treesize of output 21 [2021-11-23 01:51:10,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:51:10,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 50 [2021-11-23 01:51:10,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:51:10,898 INFO L354 Elim1Store]: treesize reduction 144, result has 23.0 percent of original size [2021-11-23 01:51:10,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 295 treesize of output 311 [2021-11-23 01:51:10,929 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 01:51:10,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 310 [2021-11-23 01:51:10,958 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 01:51:10,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 307 treesize of output 255 [2021-11-23 01:51:11,026 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-23 01:51:11,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 252 treesize of output 263 [2021-11-23 01:51:11,115 INFO L354 Elim1Store]: treesize reduction 112, result has 20.6 percent of original size [2021-11-23 01:51:11,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 251 treesize of output 271 [2021-11-23 01:51:11,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:11,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 61 [2021-11-23 01:51:11,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2021-11-23 01:51:11,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2021-11-23 01:51:11,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2021-11-23 01:51:11,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 43 [2021-11-23 01:51:11,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 01:51:11,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-23 01:51:11,405 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 01:51:11,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 182 [2021-11-23 01:51:11,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 177 [2021-11-23 01:51:11,433 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 01:51:11,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 137 [2021-11-23 01:51:11,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 treesize of output 3 [2021-11-23 01:51:11,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 treesize of output 3 [2021-11-23 01:51:11,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2021-11-23 01:51:11,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2021-11-23 01:51:11,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 43 [2021-11-23 01:51:11,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-23 01:51:11,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 23 [2021-11-23 01:51:11,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-11-23 01:51:11,777 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:51:12,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '648#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (not (= |ULTIMATE.start_main_~flag~0#1| 0)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (<= |ULTIMATE.start_main_~flag~0#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_40| Int) (|v_ULTIMATE.start_main_~p~0#1.offset_42| Int)) (= 3 (select (select |#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_40|) |v_ULTIMATE.start_main_~p~0#1.offset_42|))) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main_~flag~0#1| 2147483648)) (= |#NULL.base| 0))' at error location [2021-11-23 01:51:12,525 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:51:12,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:51:12,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2021-11-23 01:51:12,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559473982] [2021-11-23 01:51:12,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:51:12,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 01:51:12,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:12,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 01:51:12,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-11-23 01:51:12,528 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:12,763 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-11-23 01:51:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 01:51:12,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 01:51:12,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:12,765 INFO L225 Difference]: With dead ends: 35 [2021-11-23 01:51:12,765 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 01:51:12,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 01:51:12,767 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:12,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 69 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2021-11-23 01:51:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 01:51:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-23 01:51:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-23 01:51:12,772 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2021-11-23 01:51:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:12,772 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-23 01:51:12,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:12,775 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-23 01:51:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 01:51:12,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:12,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:12,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:12,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 01:51:12,993 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:12,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1518648474, now seen corresponding path program 1 times [2021-11-23 01:51:12,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:12,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965062] [2021-11-23 01:51:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:12,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:13,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:13,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965062] [2021-11-23 01:51:13,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:13,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840746850] [2021-11-23 01:51:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:13,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:13,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:13,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:13,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:51:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:13,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 01:51:13,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:13,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:51:13,310 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:51:13,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 01:51:13,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 01:51:13,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:51:13,424 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:51:13,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 84 [2021-11-23 01:51:13,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 75 [2021-11-23 01:51:13,439 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:51:13,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-11-23 01:51:13,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 30 [2021-11-23 01:51:13,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 15 [2021-11-23 01:51:13,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-11-23 01:51:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:13,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:13,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 93 treesize of output 77 [2021-11-23 01:51:13,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 200 treesize of output 188 [2021-11-23 01:51:13,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:13,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:13,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:13,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840746850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:51:13,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485529399] [2021-11-23 01:51:13,834 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:51:13,834 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:51:13,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:51:13,835 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:51:13,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:51:13,878 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 01:51:13,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-23 01:51:13,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:51:13,960 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 01:51:13,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 01:51:13,971 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 94 [2021-11-23 01:51:13,977 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 81 [2021-11-23 01:51:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:13,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 99 [2021-11-23 01:51:14,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,057 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 26 treesize of output 14 [2021-11-23 01:51:14,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,072 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 0 case distinctions, treesize of input 33 treesize of output 17 [2021-11-23 01:51:14,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-23 01:51:14,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:51:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 50 [2021-11-23 01:51:14,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:51:14,209 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 01:51:14,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 243 [2021-11-23 01:51:14,234 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 01:51:14,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 282 treesize of output 266 [2021-11-23 01:51:14,297 INFO L354 Elim1Store]: treesize reduction 144, result has 23.0 percent of original size [2021-11-23 01:51:14,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 263 treesize of output 279 [2021-11-23 01:51:14,362 INFO L354 Elim1Store]: treesize reduction 116, result has 18.9 percent of original size [2021-11-23 01:51:14,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 294 treesize of output 305 [2021-11-23 01:51:14,448 INFO L354 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2021-11-23 01:51:14,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 293 treesize of output 319 [2021-11-23 01:51:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 61 [2021-11-23 01:51:14,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2021-11-23 01:51:14,634 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 70 treesize of output 66 [2021-11-23 01:51:14,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2021-11-23 01:51:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 43 [2021-11-23 01:51:14,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 134 [2021-11-23 01:51:14,695 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 01:51:14,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 118 [2021-11-23 01:51:14,714 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 01:51:14,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2021-11-23 01:51:14,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 treesize of output 3 [2021-11-23 01:51:14,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 treesize of output 3 [2021-11-23 01:51:14,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 01:51:14,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-23 01:51:14,862 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 70 treesize of output 66 [2021-11-23 01:51:14,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2021-11-23 01:51:14,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 43 [2021-11-23 01:51:14,998 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-23 01:51:14,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 277 treesize of output 283 [2021-11-23 01:51:15,028 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 01:51:15,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 283 treesize of output 275 [2021-11-23 01:51:15,059 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 01:51:15,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 267 [2021-11-23 01:51:15,747 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:51:16,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '867#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 2)) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:51:16,890 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:51:16,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:51:16,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-11-23 01:51:16,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127256886] [2021-11-23 01:51:16,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:51:16,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 01:51:16,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:16,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 01:51:16,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-11-23 01:51:16,892 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:17,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:17,096 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-11-23 01:51:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 01:51:17,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 01:51:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:17,110 INFO L225 Difference]: With dead ends: 45 [2021-11-23 01:51:17,110 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 01:51:17,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 01:51:17,112 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:17,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 76 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 98 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-11-23 01:51:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 01:51:17,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-11-23 01:51:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-23 01:51:17,132 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 18 [2021-11-23 01:51:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:17,133 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-23 01:51:17,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-23 01:51:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 01:51:17,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:17,135 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:17,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:17,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 01:51:17,348 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:17,349 INFO L85 PathProgramCache]: Analyzing trace with hash 3226973, now seen corresponding path program 2 times [2021-11-23 01:51:17,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:17,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032609116] [2021-11-23 01:51:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:17,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:17,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:17,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032609116] [2021-11-23 01:51:17,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032609116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:17,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58775255] [2021-11-23 01:51:17,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:51:17,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:17,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:17,628 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:17,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:51:17,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 01:51:17,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:51:17,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 01:51:17,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:17,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:51:17,767 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:51:17,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 01:51:17,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:51:17,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:51:17,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:51:17,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:51:17,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 01:51:17,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:51:17,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 01:51:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:17,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-11-23 01:51:17,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:51:18,023 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-23 01:51:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1332990869] [2021-11-23 01:51:18,026 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:51:18,027 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:51:18,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:51:18,027 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:51:18,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:51:18,041 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@55cbe6d9 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:388) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 01:51:18,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:51:18,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-23 01:51:18,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186256471] [2021-11-23 01:51:18,048 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 01:51:18,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 01:51:18,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:18,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 01:51:18,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-23 01:51:18,050 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:18,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 01:51:18,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-23 01:51:18,051 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:18,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:51:18,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:18,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:18,268 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@55cbe6d9 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 01:51:18,270 INFO L158 Benchmark]: Toolchain (without parser) took 19505.02ms. Allocated memory was 96.5MB in the beginning and 174.1MB in the end (delta: 77.6MB). Free memory was 53.9MB in the beginning and 92.9MB in the end (delta: -39.0MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. [2021-11-23 01:51:18,271 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 96.5MB. Free memory is still 71.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 01:51:18,271 INFO L158 Benchmark]: CACSL2BoogieTranslator took 494.57ms. Allocated memory is still 96.5MB. Free memory was 53.7MB in the beginning and 63.8MB in the end (delta: -10.1MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2021-11-23 01:51:18,271 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.29ms. Allocated memory is still 96.5MB. Free memory was 63.8MB in the beginning and 61.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 01:51:18,271 INFO L158 Benchmark]: Boogie Preprocessor took 25.11ms. Allocated memory is still 96.5MB. Free memory was 61.9MB in the beginning and 60.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 01:51:18,272 INFO L158 Benchmark]: RCFGBuilder took 361.43ms. Allocated memory is still 96.5MB. Free memory was 60.5MB in the beginning and 48.2MB in the end (delta: 12.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 01:51:18,272 INFO L158 Benchmark]: TraceAbstraction took 18532.67ms. Allocated memory was 96.5MB in the beginning and 174.1MB in the end (delta: 77.6MB). Free memory was 47.7MB in the beginning and 92.9MB in the end (delta: -45.2MB). Peak memory consumption was 33.8MB. Max. memory is 16.1GB. [2021-11-23 01:51:18,274 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 96.5MB. Free memory is still 71.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 494.57ms. Allocated memory is still 96.5MB. Free memory was 53.7MB in the beginning and 63.8MB in the end (delta: -10.1MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.29ms. Allocated memory is still 96.5MB. Free memory was 63.8MB in the beginning and 61.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.11ms. Allocated memory is still 96.5MB. Free memory was 61.9MB in the beginning and 60.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 361.43ms. Allocated memory is still 96.5MB. Free memory was 60.5MB in the beginning and 48.2MB in the end (delta: 12.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 18532.67ms. Allocated memory was 96.5MB in the beginning and 174.1MB in the end (delta: 77.6MB). Free memory was 47.7MB in the beginning and 92.9MB in the end (delta: -45.2MB). Peak memory consumption was 33.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@55cbe6d9 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@55cbe6d9: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 01:51:18,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/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_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/list_flag-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/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 4547628201bbb61f481f84914c46868091db8c6a3d0c4d8890951b495ae3c7da --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:51:20,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:51:20,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:51:20,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:51:20,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:51:20,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:51:20,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:51:20,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:51:20,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:51:20,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:51:20,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:51:20,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:51:20,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:51:20,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:51:20,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:51:20,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:51:20,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:51:20,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:51:20,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:51:20,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:51:20,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:51:20,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:51:20,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:51:20,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:51:20,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:51:20,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:51:20,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:51:20,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:51:20,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:51:20,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:51:20,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:51:20,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:51:20,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:51:20,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:51:20,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:51:20,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:51:20,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:51:20,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:51:20,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:51:20,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:51:20,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:51:20,956 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 01:51:21,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:51:21,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:51:21,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:51:21,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:51:21,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:51:21,004 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:51:21,004 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:51:21,004 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:51:21,005 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:51:21,005 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:51:21,006 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:51:21,006 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:51:21,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:51:21,008 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:51:21,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:51:21,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:51:21,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:51:21,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:51:21,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:51:21,009 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 01:51:21,009 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 01:51:21,009 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 01:51:21,010 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:51:21,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:51:21,010 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:51:21,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:51:21,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:51:21,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 01:51:21,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:51:21,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:51:21,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:51:21,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:51:21,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:51:21,012 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 01:51:21,013 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 01:51:21,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:51:21,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:51:21,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:51:21,013 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_bd9c8979-fde8-46c4-906c-934dfb8a7672/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4547628201bbb61f481f84914c46868091db8c6a3d0c4d8890951b495ae3c7da [2021-11-23 01:51:21,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:51:21,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:51:21,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:51:21,457 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:51:21,458 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:51:21,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-properties/list_flag-2.i [2021-11-23 01:51:21,546 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/data/98fb53ab8/4f8027430976430a83bef1774ce2f0ee/FLAGb56f1f1bc [2021-11-23 01:51:22,146 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:51:22,148 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/sv-benchmarks/c/list-properties/list_flag-2.i [2021-11-23 01:51:22,170 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/data/98fb53ab8/4f8027430976430a83bef1774ce2f0ee/FLAGb56f1f1bc [2021-11-23 01:51:22,426 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/data/98fb53ab8/4f8027430976430a83bef1774ce2f0ee [2021-11-23 01:51:22,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:51:22,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:51:22,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:51:22,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:51:22,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:51:22,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:22,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7281d7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22, skipping insertion in model container [2021-11-23 01:51:22,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:22,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:51:22,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:51:22,845 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_bd9c8979-fde8-46c4-906c-934dfb8a7672/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2021-11-23 01:51:22,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:51:22,861 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:51:22,914 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_bd9c8979-fde8-46c4-906c-934dfb8a7672/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2021-11-23 01:51:22,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:51:22,958 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:51:22,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22 WrapperNode [2021-11-23 01:51:22,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:51:22,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:51:22,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:51:22,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:51:22,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:22,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:23,008 INFO L137 Inliner]: procedures = 127, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2021-11-23 01:51:23,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:51:23,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:51:23,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:51:23,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:51:23,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:23,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:23,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:23,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:23,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:23,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:23,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:23,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:51:23,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:51:23,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:51:23,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:51:23,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22" (1/1) ... [2021-11-23 01:51:23,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:51:23,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:23,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:51:23,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:51:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-23 01:51:23,128 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-23 01:51:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 01:51:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 01:51:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:51:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 01:51:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 01:51:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 01:51:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 01:51:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:51:23,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:51:23,232 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:51:23,234 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:51:23,279 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-23 01:51:23,447 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:51:23,452 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:51:23,453 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 01:51:23,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:51:23 BoogieIcfgContainer [2021-11-23 01:51:23,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:51:23,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:51:23,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:51:23,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:51:23,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:51:22" (1/3) ... [2021-11-23 01:51:23,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9514454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:51:23, skipping insertion in model container [2021-11-23 01:51:23,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:22" (2/3) ... [2021-11-23 01:51:23,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9514454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:51:23, skipping insertion in model container [2021-11-23 01:51:23,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:51:23" (3/3) ... [2021-11-23 01:51:23,463 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2021-11-23 01:51:23,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:51:23,484 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:51:23,572 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:51:23,591 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 01:51:23,591 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:51:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:23,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 01:51:23,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:23,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:23,630 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash 343795079, now seen corresponding path program 1 times [2021-11-23 01:51:23,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 01:51:23,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751193249] [2021-11-23 01:51:23,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:23,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 01:51:23,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 01:51:23,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 01:51:23,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 01:51:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:23,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 01:51:23,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:23,879 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 01:51:23,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:23,909 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 01:51:23,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 01:51:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751193249] [2021-11-23 01:51:23,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751193249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:23,912 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:23,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 01:51:23,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065366169] [2021-11-23 01:51:23,916 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:23,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 01:51:23,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 01:51:23,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 01:51:23,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 01:51:23,965 INFO L87 Difference]: Start difference. First operand has 26 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:23,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:23,986 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-11-23 01:51:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 01:51:23,993 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 01:51:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:24,000 INFO L225 Difference]: With dead ends: 39 [2021-11-23 01:51:24,000 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 01:51:24,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 01:51:24,009 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:24,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:51:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 01:51:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 01:51:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-23 01:51:24,047 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-11-23 01:51:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:24,048 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-23 01:51:24,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-23 01:51:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 01:51:24,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:24,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:24,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 01:51:24,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 01:51:24,264 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:24,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2061066599, now seen corresponding path program 1 times [2021-11-23 01:51:24,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 01:51:24,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298866426] [2021-11-23 01:51:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:24,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 01:51:24,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 01:51:24,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 01:51:24,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 01:51:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:24,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 01:51:24,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:24,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:51:24,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-11-23 01:51:24,492 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 01:51:24,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:24,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 21 [2021-11-23 01:51:24,553 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 01:51:24,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 01:51:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298866426] [2021-11-23 01:51:24,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298866426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:24,555 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:24,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 01:51:24,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474542743] [2021-11-23 01:51:24,556 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:24,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:51:24,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 01:51:24,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:51:24,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:51:24,559 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:24,725 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-11-23 01:51:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:51:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 01:51:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:24,727 INFO L225 Difference]: With dead ends: 42 [2021-11-23 01:51:24,727 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 01:51:24,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:51:24,729 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:24,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 53 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 01:51:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2021-11-23 01:51:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-23 01:51:24,738 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 12 [2021-11-23 01:51:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:24,739 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-23 01:51:24,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-23 01:51:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 01:51:24,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:24,740 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:24,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:24,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 01:51:24,953 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:24,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash 753754370, now seen corresponding path program 1 times [2021-11-23 01:51:24,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 01:51:24,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486858997] [2021-11-23 01:51:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:24,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 01:51:24,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 01:51:24,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 01:51:24,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 01:51:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 01:51:25,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:25,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:51:25,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-11-23 01:51:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:25,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:25,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-11-23 01:51:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:25,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 01:51:25,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486858997] [2021-11-23 01:51:25,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486858997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:25,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:25,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-23 01:51:25,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151505078] [2021-11-23 01:51:25,209 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:25,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:51:25,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 01:51:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:51:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:51:25,211 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:25,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:25,405 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-11-23 01:51:25,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:51:25,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 01:51:25,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:25,409 INFO L225 Difference]: With dead ends: 50 [2021-11-23 01:51:25,409 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 01:51:25,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-23 01:51:25,411 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:25,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 75 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 01:51:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2021-11-23 01:51:25,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-23 01:51:25,418 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2021-11-23 01:51:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:25,419 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-23 01:51:25,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-23 01:51:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 01:51:25,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:25,420 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:25,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:25,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 01:51:25,634 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:25,635 INFO L85 PathProgramCache]: Analyzing trace with hash -489987151, now seen corresponding path program 1 times [2021-11-23 01:51:25,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 01:51:25,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622080789] [2021-11-23 01:51:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:25,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 01:51:25,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 01:51:25,640 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 01:51:25,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 01:51:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:25,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 01:51:25,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:25,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:51:25,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-11-23 01:51:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:25,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:25,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-11-23 01:51:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:25,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 01:51:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622080789] [2021-11-23 01:51:25,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622080789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:25,865 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:25,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-23 01:51:25,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918595545] [2021-11-23 01:51:25,866 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:25,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:51:25,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 01:51:25,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:51:25,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:51:25,869 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:26,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:26,105 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-11-23 01:51:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:51:26,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 01:51:26,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:26,107 INFO L225 Difference]: With dead ends: 48 [2021-11-23 01:51:26,107 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 01:51:26,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-23 01:51:26,109 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:26,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 79 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:51:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 01:51:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 20. [2021-11-23 01:51:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-23 01:51:26,114 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2021-11-23 01:51:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:26,115 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-23 01:51:26,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-23 01:51:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 01:51:26,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:26,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:26,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 01:51:26,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 01:51:26,328 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:26,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1549504229, now seen corresponding path program 1 times [2021-11-23 01:51:26,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 01:51:26,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739422279] [2021-11-23 01:51:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:26,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 01:51:26,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 01:51:26,331 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 01:51:26,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 01:51:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:26,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:51:26,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:26,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:26,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 01:51:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739422279] [2021-11-23 01:51:26,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739422279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:26,485 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:26,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 01:51:26,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716994749] [2021-11-23 01:51:26,485 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:26,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:51:26,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 01:51:26,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:51:26,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:26,487 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:26,513 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-11-23 01:51:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:51:26,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 01:51:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:26,515 INFO L225 Difference]: With dead ends: 46 [2021-11-23 01:51:26,515 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 01:51:26,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:26,517 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:26,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:51:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 01:51:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-11-23 01:51:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-11-23 01:51:26,528 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2021-11-23 01:51:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:26,536 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-11-23 01:51:26,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-11-23 01:51:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 01:51:26,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:26,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:26,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:26,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 01:51:26,750 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1993241174, now seen corresponding path program 1 times [2021-11-23 01:51:26,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 01:51:26,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097996598] [2021-11-23 01:51:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:26,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 01:51:26,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 01:51:26,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 01:51:26,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 01:51:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:26,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 01:51:26,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:26,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:51:26,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:51:26,956 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:51:26,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 01:51:27,034 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-23 01:51:27,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 01:51:27,083 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 01:51:27,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:51:27,175 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 01:51:27,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-23 01:51:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:27,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:34,185 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_34| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_1)))) (store .cse0 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_34| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-23 01:51:44,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 243 treesize of output 235 [2021-11-23 01:51:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:48,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 01:51:48,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097996598] [2021-11-23 01:51:48,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097996598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:51:48,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1945201103] [2021-11-23 01:51:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:48,804 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 01:51:48,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 01:51:48,810 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 01:51:48,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 01:51:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:48,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 01:51:48,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:48,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:51:49,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:51:49,150 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:51:49,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 01:51:49,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:49,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 01:51:49,360 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 01:51:49,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:51:49,488 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 01:51:49,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-23 01:51:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:49,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:57,458 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_10| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_10|))))) (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_41| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_2)))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_10| (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_10|) |v_ULTIMATE.start_main_~p~0#1.offset_41| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))))) is different from false [2021-11-23 01:51:57,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 222 treesize of output 214 [2021-11-23 01:52:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:00,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1945201103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:52:00,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385664290] [2021-11-23 01:52:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:00,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:00,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:00,089 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:00,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 01:52:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:00,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 01:52:00,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:00,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:00,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:00,248 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:52:00,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 01:52:00,324 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-23 01:52:00,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 01:52:00,374 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 01:52:00,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:00,466 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 01:52:00,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-23 01:52:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:00,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:52:13,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 243 treesize of output 235 [2021-11-23 01:52:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385664290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:52:13,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 01:52:13,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 22 [2021-11-23 01:52:13,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520273947] [2021-11-23 01:52:13,472 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 01:52:13,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 01:52:13,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 01:52:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 01:52:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=303, Unknown=11, NotChecked=74, Total=462 [2021-11-23 01:52:13,474 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:52:20,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:20,004 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-11-23 01:52:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 01:52:20,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 01:52:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:20,006 INFO L225 Difference]: With dead ends: 55 [2021-11-23 01:52:20,006 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 01:52:20,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=117, Invalid=432, Unknown=11, NotChecked=90, Total=650 [2021-11-23 01:52:20,008 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:20,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 89 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 82 Invalid, 0 Unknown, 185 Unchecked, 0.3s Time] [2021-11-23 01:52:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 01:52:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2021-11-23 01:52:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:52:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-11-23 01:52:20,015 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 17 [2021-11-23 01:52:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:20,015 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-11-23 01:52:20,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:52:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-11-23 01:52:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 01:52:20,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:20,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:20,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:20,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:20,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:20,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 01:52:20,618 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:52:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:20,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1291338791, now seen corresponding path program 1 times [2021-11-23 01:52:20,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 01:52:20,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800891679] [2021-11-23 01:52:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:20,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 01:52:20,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 01:52:20,620 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 01:52:20,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 01:52:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:20,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 01:52:20,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:20,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:20,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:20,806 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:52:20,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 01:52:20,889 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-23 01:52:20,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 01:52:20,951 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 01:52:20,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:21,044 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 01:52:21,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-23 01:52:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:21,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:52:31,192 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_4 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_55| (_ BitVec 32))) (= (_ bv2 32) (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_4)))) (store .cse0 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_55| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2021-11-23 01:52:43,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 118 treesize of output 114 [2021-11-23 01:52:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:47,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 01:52:47,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800891679] [2021-11-23 01:52:47,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800891679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:52:47,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [83565543] [2021-11-23 01:52:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:47,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 01:52:47,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 01:52:47,596 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 01:52:47,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 01:52:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:47,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 01:52:47,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:47,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:52:47,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:52:47,946 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:52:47,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 01:52:48,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:48,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 01:52:48,139 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 01:52:48,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:52:48,233 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 01:52:48,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-23 01:52:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:52:48,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:08,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 118 treesize of output 114 [2021-11-23 01:53:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:08,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [83565543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:08,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268207733] [2021-11-23 01:53:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:08,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:08,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:08,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:08,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 01:53:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:08,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 01:53:08,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:08,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:53:08,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:53:08,991 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:53:08,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 01:53:09,051 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-23 01:53:09,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 01:53:09,106 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 01:53:09,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 01:53:09,179 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 01:53:09,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-23 01:53:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:09,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:19,498 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_18| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_18|)))) (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_62| (_ BitVec 32))) (= (_ bv2 32) (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_5)))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_18| (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_18|) |v_ULTIMATE.start_main_~p~0#1.offset_62| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2021-11-23 01:53:19,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 221 treesize of output 213 [2021-11-23 01:53:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:24,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268207733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:24,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 01:53:24,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 22 [2021-11-23 01:53:24,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968229165] [2021-11-23 01:53:24,044 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:24,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 01:53:24,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 01:53:24,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 01:53:24,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=302, Unknown=12, NotChecked=74, Total=462 [2021-11-23 01:53:24,046 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:32,342 WARN L227 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 38 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 01:53:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:36,670 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-11-23 01:53:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 01:53:36,671 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 01:53:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:36,672 INFO L225 Difference]: With dead ends: 66 [2021-11-23 01:53:36,672 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 01:53:36,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=109, Invalid=393, Unknown=12, NotChecked=86, Total=600 [2021-11-23 01:53:36,673 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:36,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 130 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2021-11-23 01:53:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 01:53:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2021-11-23 01:53:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-11-23 01:53:36,682 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 17 [2021-11-23 01:53:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:36,682 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-11-23 01:53:36,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-11-23 01:53:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 01:53:36,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:36,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:36,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:36,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:37,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:37,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 01:53:37,286 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:37,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:37,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1735075736, now seen corresponding path program 1 times [2021-11-23 01:53:37,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 01:53:37,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3004495] [2021-11-23 01:53:37,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:37,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 01:53:37,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 01:53:37,288 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 01:53:37,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 01:53:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:53:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:37,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:37,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 01:53:37,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3004495] [2021-11-23 01:53:37,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3004495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 01:53:37,419 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:53:37,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 01:53:37,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298539493] [2021-11-23 01:53:37,420 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 01:53:37,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:53:37,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 01:53:37,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:53:37,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:53:37,421 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:37,440 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-11-23 01:53:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:53:37,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 01:53:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:37,444 INFO L225 Difference]: With dead ends: 61 [2021-11-23 01:53:37,444 INFO L226 Difference]: Without dead ends: 48 [2021-11-23 01:53:37,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:53:37,445 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:37,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:53:37,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-23 01:53:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-11-23 01:53:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-23 01:53:37,455 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 17 [2021-11-23 01:53:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:37,456 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-23 01:53:37,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-23 01:53:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 01:53:37,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:37,457 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:37,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:37,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 01:53:37,672 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash 85022309, now seen corresponding path program 1 times [2021-11-23 01:53:37,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 01:53:37,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752078923] [2021-11-23 01:53:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:37,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 01:53:37,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 01:53:37,673 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 01:53:37,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 01:53:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:37,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 01:53:37,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:37,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:37,945 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:37,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 89 [2021-11-23 01:53:37,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 74 [2021-11-23 01:53:37,973 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:37,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 52 [2021-11-23 01:53:38,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 36 [2021-11-23 01:53:38,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 21 [2021-11-23 01:53:38,175 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:53:38,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-11-23 01:53:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:38,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:38,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:53:38,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 111 [2021-11-23 01:53:38,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 157 treesize of output 151 [2021-11-23 01:53:38,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:53:38,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 112 [2021-11-23 01:53:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:39,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 01:53:39,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752078923] [2021-11-23 01:53:39,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752078923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:39,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1911793710] [2021-11-23 01:53:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:39,066 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 01:53:39,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 01:53:39,067 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 01:53:39,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 01:53:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:39,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 01:53:39,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:39,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:53:39,383 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:53:39,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 01:53:39,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 01:53:39,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:39,703 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:39,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 93 [2021-11-23 01:53:39,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 84 [2021-11-23 01:53:39,725 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:39,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 62 [2021-11-23 01:53:39,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 33 [2021-11-23 01:53:39,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 18 [2021-11-23 01:53:39,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-11-23 01:53:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:39,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:40,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 93 treesize of output 77 [2021-11-23 01:53:40,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 83 treesize of output 77 [2021-11-23 01:53:40,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:40,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:44,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1911793710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:44,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006995359] [2021-11-23 01:53:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:44,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:44,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:44,812 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:44,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 01:53:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:44,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 01:53:44,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:44,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:53:44,982 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:53:44,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 01:53:45,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 01:53:45,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:45,304 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:45,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 84 [2021-11-23 01:53:45,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 75 [2021-11-23 01:53:45,326 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:45,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-11-23 01:53:45,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 26 [2021-11-23 01:53:45,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 15 [2021-11-23 01:53:45,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-11-23 01:53:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:45,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:45,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 93 treesize of output 77 [2021-11-23 01:53:45,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 83 treesize of output 77 [2021-11-23 01:53:45,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:45,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:45,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:48,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006995359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:48,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 01:53:48,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 34 [2021-11-23 01:53:48,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75510683] [2021-11-23 01:53:48,196 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:48,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 01:53:48,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 01:53:48,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 01:53:48,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=946, Unknown=3, NotChecked=0, Total=1122 [2021-11-23 01:53:48,197 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:49,851 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-11-23 01:53:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 01:53:49,852 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 01:53:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:49,853 INFO L225 Difference]: With dead ends: 78 [2021-11-23 01:53:49,853 INFO L226 Difference]: Without dead ends: 63 [2021-11-23 01:53:49,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=380, Invalid=1779, Unknown=3, NotChecked=0, Total=2162 [2021-11-23 01:53:49,855 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 128 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:49,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 191 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 282 Invalid, 0 Unknown, 86 Unchecked, 0.8s Time] [2021-11-23 01:53:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-23 01:53:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2021-11-23 01:53:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-23 01:53:49,866 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 19 [2021-11-23 01:53:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:49,866 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-23 01:53:49,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-23 01:53:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 01:53:49,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:49,868 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:49,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:50,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:50,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-23 01:53:50,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 01:53:50,493 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:50,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:50,493 INFO L85 PathProgramCache]: Analyzing trace with hash 364361551, now seen corresponding path program 1 times [2021-11-23 01:53:50,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 01:53:50,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544428594] [2021-11-23 01:53:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:50,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 01:53:50,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 01:53:50,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 01:53:50,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 01:53:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 01:53:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:50,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:50,872 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:50,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 89 [2021-11-23 01:53:50,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 74 [2021-11-23 01:53:50,902 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:50,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 52 [2021-11-23 01:53:51,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 36 [2021-11-23 01:53:51,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 21 [2021-11-23 01:53:51,117 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:53:51,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-11-23 01:53:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:51,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:51,394 INFO L354 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2021-11-23 01:53:51,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 67 [2021-11-23 01:53:51,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 286 treesize of output 274 [2021-11-23 01:53:51,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:53:51,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 245 treesize of output 188 [2021-11-23 01:53:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:52,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 01:53:52,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544428594] [2021-11-23 01:53:52,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544428594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:52,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [170469739] [2021-11-23 01:53:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:52,142 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 01:53:52,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 01:53:52,143 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 01:53:52,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 01:53:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 01:53:52,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:52,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:53:52,524 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:53:52,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 01:53:52,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:52,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 01:53:52,852 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:52,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 84 [2021-11-23 01:53:52,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 75 [2021-11-23 01:53:52,876 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:52,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-11-23 01:53:52,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 26 [2021-11-23 01:53:52,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 15 [2021-11-23 01:53:53,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-11-23 01:53:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:53,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:53,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 72 treesize of output 56 [2021-11-23 01:53:53,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 83 treesize of output 77 [2021-11-23 01:53:53,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:53,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:53,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:55,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [170469739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:55,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923944940] [2021-11-23 01:53:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:55,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:55,939 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:55,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 01:53:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:55,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 01:53:55,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:55,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:53:56,082 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:53:56,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-23 01:53:56,135 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 01:53:56,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:56,238 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:56,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 84 [2021-11-23 01:53:56,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 75 [2021-11-23 01:53:56,268 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-23 01:53:56,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-11-23 01:53:56,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 26 [2021-11-23 01:53:56,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 15 [2021-11-23 01:53:56,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-11-23 01:53:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:56,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:56,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 72 treesize of output 56 [2021-11-23 01:53:56,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 83 treesize of output 77 [2021-11-23 01:53:56,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:56,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:56,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:54:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:54:00,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923944940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:00,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 01:54:00,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 29 [2021-11-23 01:54:00,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714384240] [2021-11-23 01:54:00,911 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 01:54:00,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 01:54:00,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 01:54:00,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 01:54:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=693, Unknown=1, NotChecked=0, Total=812 [2021-11-23 01:54:00,913 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:02,184 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-11-23 01:54:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 01:54:02,185 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 01:54:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:02,185 INFO L225 Difference]: With dead ends: 64 [2021-11-23 01:54:02,186 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 01:54:02,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=250, Invalid=1155, Unknown=1, NotChecked=0, Total=1406 [2021-11-23 01:54:02,188 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:02,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 131 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 186 Invalid, 0 Unknown, 40 Unchecked, 0.6s Time] [2021-11-23 01:54:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 01:54:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2021-11-23 01:54:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-23 01:54:02,193 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 21 [2021-11-23 01:54:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:02,194 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-23 01:54:02,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-23 01:54:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 01:54:02,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:02,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:02,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-23 01:54:02,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-23 01:54:02,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:02,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 01:54:02,797 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash -215994762, now seen corresponding path program 2 times [2021-11-23 01:54:02,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 01:54:02,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941715678] [2021-11-23 01:54:02,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 01:54:02,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 01:54:02,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 01:54:02,800 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 01:54:02,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c8979-fde8-46c4-906c-934dfb8a7672/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 01:54:02,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 01:54:02,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:54:02,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 01:54:02,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:02,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 01:54:03,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 01:54:03,114 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:54:03,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 01:54:03,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:03,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 01:54:03,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 01:54:03,479 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-23 01:54:03,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-11-23 01:54:03,678 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-11-23 01:54:03,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-11-23 01:54:04,455 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 01:54:04,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-23 01:54:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:54:04,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:06,634 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| (_ bv3 32))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) is different from false [2021-11-23 01:54:08,679 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_124| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_19)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_124| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_124|) |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= (_ bv3 32) .cse0)))) is different from false [2021-11-23 01:54:10,729 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_124| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_19)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_124| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_124|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (_ bv3 32) .cse0) (= (_ bv1 32) .cse0)))) is different from false [2021-11-23 01:54:12,762 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (|ULTIMATE.start_main_~p~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_124| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| (_ bv1 32)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_19)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_124| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_124|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-11-23 01:54:14,836 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_124| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_131| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_20)))) (store .cse2 |c_ULTIMATE.start_main_~t~0#1.base| (store (store (select .cse2 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_131| (_ bv1 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_131|) v_DerPreprocessor_19))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_124| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_124|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= (_ bv3 32) .cse0)))) is different from false [2021-11-23 01:54:35,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3671 treesize of output 3639