./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_2-1-simple.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_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/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_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_2-1-simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/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_fc37fcca-d0b2-49e0-afac-db6e31816c25/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 ef2ac183abfa5be888591001d2f7376a659c701d3e7fb64cad1cba56a829d8b3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:30:20,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:30:20,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:30:20,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:30:20,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:30:20,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:30:20,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:30:20,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:30:20,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:30:20,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:30:20,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:30:20,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:30:20,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:30:20,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:30:20,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:30:20,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:30:20,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:30:20,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:30:20,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:30:20,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:30:20,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:30:20,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:30:20,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:30:20,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:30:20,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:30:20,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:30:20,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:30:20,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:30:20,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:30:20,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:30:20,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:30:20,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:30:20,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:30:20,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:30:20,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:30:20,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:30:20,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:30:20,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:30:20,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:30:20,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:30:20,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:30:20,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:30:20,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:30:20,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:30:20,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:30:20,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:30:20,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:30:20,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:30:20,533 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:30:20,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:30:20,534 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:30:20,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:30:20,535 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:30:20,536 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:30:20,536 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:30:20,536 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:30:20,537 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:30:20,537 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:30:20,537 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:30:20,538 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:30:20,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:30:20,539 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:30:20,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:30:20,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:30:20,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:30:20,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:30:20,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:30:20,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:30:20,543 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:30:20,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:30:20,543 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:30:20,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:30:20,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:30:20,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:30:20,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:30:20,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:30:20,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:30:20,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:30:20,546 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:30:20,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:30:20,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:30:20,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:30:20,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:30:20,548 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_fc37fcca-d0b2-49e0-afac-db6e31816c25/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef2ac183abfa5be888591001d2f7376a659c701d3e7fb64cad1cba56a829d8b3 [2021-11-23 02:30:20,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:30:20,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:30:21,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:30:21,003 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:30:21,003 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:30:21,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2021-11-23 02:30:21,077 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/data/fdf542f96/21a5946f6abe476db9adfeb135a1e5c8/FLAG16a75f1e1 [2021-11-23 02:30:21,640 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:30:21,641 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2021-11-23 02:30:21,652 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/data/fdf542f96/21a5946f6abe476db9adfeb135a1e5c8/FLAG16a75f1e1 [2021-11-23 02:30:21,981 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/data/fdf542f96/21a5946f6abe476db9adfeb135a1e5c8 [2021-11-23 02:30:21,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:30:21,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:30:21,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:30:21,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:30:21,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:30:21,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:30:21" (1/1) ... [2021-11-23 02:30:21,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633dbdbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:21, skipping insertion in model container [2021-11-23 02:30:21,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:30:21" (1/1) ... [2021-11-23 02:30:22,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:30:22,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:30:22,264 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_fc37fcca-d0b2-49e0-afac-db6e31816c25/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i[809,822] [2021-11-23 02:30:22,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:30:22,303 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:30:22,321 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_fc37fcca-d0b2-49e0-afac-db6e31816c25/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i[809,822] [2021-11-23 02:30:22,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:30:22,350 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:30:22,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22 WrapperNode [2021-11-23 02:30:22,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:30:22,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:30:22,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:30:22,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:30:22,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22" (1/1) ... [2021-11-23 02:30:22,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22" (1/1) ... [2021-11-23 02:30:22,406 INFO L137 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2021-11-23 02:30:22,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:30:22,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:30:22,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:30:22,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:30:22,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22" (1/1) ... [2021-11-23 02:30:22,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22" (1/1) ... [2021-11-23 02:30:22,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22" (1/1) ... [2021-11-23 02:30:22,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22" (1/1) ... [2021-11-23 02:30:22,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22" (1/1) ... [2021-11-23 02:30:22,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22" (1/1) ... [2021-11-23 02:30:22,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22" (1/1) ... [2021-11-23 02:30:22,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:30:22,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:30:22,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:30:22,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:30:22,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22" (1/1) ... [2021-11-23 02:30:22,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:30:22,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:22,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:30:22,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:30:22,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:30:22,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:30:22,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:30:22,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:30:22,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:30:22,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:30:22,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:30:22,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:30:22,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:30:22,679 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:30:22,681 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:30:22,876 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:30:22,919 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:30:22,919 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:30:22,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:30:22 BoogieIcfgContainer [2021-11-23 02:30:22,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:30:22,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:30:22,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:30:22,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:30:22,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:30:21" (1/3) ... [2021-11-23 02:30:22,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcfe5ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:30:22, skipping insertion in model container [2021-11-23 02:30:22,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:30:22" (2/3) ... [2021-11-23 02:30:22,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcfe5ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:30:22, skipping insertion in model container [2021-11-23 02:30:22,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:30:22" (3/3) ... [2021-11-23 02:30:22,933 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.i [2021-11-23 02:30:22,940 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:30:22,940 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:30:23,003 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:30:23,012 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:30:23,012 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:30:23,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 02:30:23,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:23,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 02:30:23,038 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:23,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1941830, now seen corresponding path program 1 times [2021-11-23 02:30:23,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:23,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119384164] [2021-11-23 02:30:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:23,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:23,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:23,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119384164] [2021-11-23 02:30:23,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119384164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:23,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:23,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:30:23,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664180613] [2021-11-23 02:30:23,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:23,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:30:23,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:23,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:30:23,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:30:23,433 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:23,505 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-23 02:30:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:30:23,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-23 02:30:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:23,529 INFO L225 Difference]: With dead ends: 13 [2021-11-23 02:30:23,529 INFO L226 Difference]: Without dead ends: 6 [2021-11-23 02:30:23,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:30:23,545 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:23,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:30:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-23 02:30:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-23 02:30:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-23 02:30:23,597 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-23 02:30:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:23,598 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-23 02:30:23,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-23 02:30:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:30:23,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:23,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:30:23,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:30:23,602 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash 60064071, now seen corresponding path program 1 times [2021-11-23 02:30:23,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:23,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32305914] [2021-11-23 02:30:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:23,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:23,679 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 02:30:23,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32305914] [2021-11-23 02:30:23,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32305914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742394145] [2021-11-23 02:30:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:23,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:23,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:23,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:23,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:30:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:23,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:30:23,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:23,889 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 02:30:23,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:23,947 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 02:30:23,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742394145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:23,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541972331] [2021-11-23 02:30:23,997 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-23 02:30:23,998 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:24,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:24,012 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:24,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:24,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:24,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:24,248 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:30:24,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:30:24,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:24,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:24,385 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:30:24,386 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 39 treesize of output 53 [2021-11-23 02:30:24,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:24,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:24,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:24,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-23 02:30:24,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:24,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:24,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-23 02:30:24,853 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-23 02:30:24,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 281 treesize of output 270 [2021-11-23 02:30:25,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:25,195 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:30:25,195 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 29 treesize of output 28 [2021-11-23 02:30:25,226 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:25,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:25,360 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:25,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:25,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 02:30:25,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416600167] [2021-11-23 02:30:25,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:25,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:30:25,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:30:25,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:30:25,366 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 02:30:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:25,394 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-23 02:30:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:30:25,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 5 [2021-11-23 02:30:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:25,396 INFO L225 Difference]: With dead ends: 12 [2021-11-23 02:30:25,397 INFO L226 Difference]: Without dead ends: 9 [2021-11-23 02:30:25,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:30:25,405 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:25,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:30:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-23 02:30:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-23 02:30:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-23 02:30:25,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-23 02:30:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:25,415 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-23 02:30:25,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 02:30:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-23 02:30:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:30:25,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:25,417 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-23 02:30:25,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:25,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 02:30:25,633 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:25,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:25,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1764353658, now seen corresponding path program 2 times [2021-11-23 02:30:25,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:25,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770888936] [2021-11-23 02:30:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:25,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:25,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:25,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770888936] [2021-11-23 02:30:25,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770888936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:25,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763345860] [2021-11-23 02:30:25,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:30:25,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:25,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:25,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:25,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:30:25,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:30:25,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:30:25,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:30:25,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:25,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:26,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763345860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700316694] [2021-11-23 02:30:26,069 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-23 02:30:26,070 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:26,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:26,072 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:26,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:26,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:26,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:26,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:26,136 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:30:26,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-23 02:30:26,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:26,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:26,188 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:30:26,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:30:26,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:26,258 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:30:26,259 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 39 treesize of output 53 [2021-11-23 02:30:26,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:26,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:26,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-23 02:30:26,507 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-23 02:30:26,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 281 treesize of output 270 [2021-11-23 02:30:26,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:26,743 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:30:26,744 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 29 treesize of output 28 [2021-11-23 02:30:26,765 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:26,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:26,887 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:26,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:26,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-23 02:30:26,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657562892] [2021-11-23 02:30:26,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:26,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:30:26,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:30:26,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:30:26,890 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:26,922 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-23 02:30:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:30:26,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 02:30:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:26,923 INFO L225 Difference]: With dead ends: 18 [2021-11-23 02:30:26,924 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 02:30:26,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:30:26,926 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:26,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:30:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 02:30:26,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 02:30:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-23 02:30:26,931 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-23 02:30:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:26,932 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-23 02:30:26,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-23 02:30:26,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:30:26,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:26,934 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-23 02:30:26,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:27,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 02:30:27,153 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:27,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:27,154 INFO L85 PathProgramCache]: Analyzing trace with hash 193090022, now seen corresponding path program 3 times [2021-11-23 02:30:27,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:27,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202597284] [2021-11-23 02:30:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:27,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:27,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:27,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202597284] [2021-11-23 02:30:27,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202597284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:27,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595171890] [2021-11-23 02:30:27,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:30:27,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:27,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:27,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:27,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:30:27,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:30:27,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:30:27,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:30:27,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:27,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:27,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595171890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:27,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694501592] [2021-11-23 02:30:27,841 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-23 02:30:27,841 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:27,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:27,842 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:27,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:27,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:27,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:27,918 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:30:27,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:30:27,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:27,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:27,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:27,958 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:30:27,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-23 02:30:27,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:27,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:28,036 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:30:28,037 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 39 treesize of output 53 [2021-11-23 02:30:28,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:28,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:28,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-23 02:30:28,216 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-23 02:30:28,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 285 treesize of output 272 [2021-11-23 02:30:28,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:28,415 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:30:28,415 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 29 treesize of output 28 [2021-11-23 02:30:28,434 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:28,563 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:28,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:28,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:28,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-23 02:30:28,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129022035] [2021-11-23 02:30:28,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:28,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:30:28,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:28,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:30:28,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:30:28,567 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:28,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:28,635 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-23 02:30:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:30:28,636 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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 02:30:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:28,640 INFO L225 Difference]: With dead ends: 30 [2021-11-23 02:30:28,640 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 02:30:28,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:30:28,644 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:28,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:30:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 02:30:28,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 02:30:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 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 02:30:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-23 02:30:28,660 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-23 02:30:28,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:28,661 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-23 02:30:28,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-23 02:30:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:30:28,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:28,663 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-23 02:30:28,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:28,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:28,889 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:28,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:28,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1874160294, now seen corresponding path program 4 times [2021-11-23 02:30:28,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:28,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353298837] [2021-11-23 02:30:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:28,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:29,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:29,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353298837] [2021-11-23 02:30:29,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353298837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:29,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835867083] [2021-11-23 02:30:29,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:30:29,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:29,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:29,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:29,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:30:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:30:29,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:29,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:30,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835867083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:30,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250650838] [2021-11-23 02:30:30,660 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-23 02:30:30,661 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:30,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:30,661 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:30,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:30,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,722 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:30:30,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:30:30,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:30,756 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:30:30,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-23 02:30:30,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,812 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:30:30,813 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 39 treesize of output 53 [2021-11-23 02:30:30,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:30,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-23 02:30:30,968 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-23 02:30:30,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 285 treesize of output 272 [2021-11-23 02:30:31,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:31,131 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:30:31,132 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 29 treesize of output 28 [2021-11-23 02:30:31,150 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:31,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '624#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:31,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:31,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:31,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-23 02:30:31,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208024591] [2021-11-23 02:30:31,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:31,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 02:30:31,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 02:30:31,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:30:31,312 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:31,417 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-23 02:30:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 02:30:31,418 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 26 [2021-11-23 02:30:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:31,420 INFO L225 Difference]: With dead ends: 54 [2021-11-23 02:30:31,420 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 02:30:31,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:30:31,423 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:31,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:30:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 02:30:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-23 02:30:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-23 02:30:31,433 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-11-23 02:30:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:31,434 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-23 02:30:31,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-23 02:30:31,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:30:31,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:31,437 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2021-11-23 02:30:31,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:31,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:31,657 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:31,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:31,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1326564314, now seen corresponding path program 5 times [2021-11-23 02:30:31,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:31,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673433926] [2021-11-23 02:30:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:31,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:33,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:33,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673433926] [2021-11-23 02:30:33,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673433926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:33,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432376421] [2021-11-23 02:30:33,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:30:33,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:33,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:33,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:33,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:30:34,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-23 02:30:34,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:30:34,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 02:30:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:35,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:38,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432376421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:38,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1922278065] [2021-11-23 02:30:38,744 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-23 02:30:38,744 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:38,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:38,745 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:38,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:38,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:38,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:38,800 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 02:30:38,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 02:30:38,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:38,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:38,857 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:30:38,858 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 39 treesize of output 53 [2021-11-23 02:30:38,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:38,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:38,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:38,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-23 02:30:38,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:38,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:38,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-23 02:30:39,029 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-23 02:30:39,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 281 treesize of output 270 [2021-11-23 02:30:39,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:39,177 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:30:39,178 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 29 treesize of output 28 [2021-11-23 02:30:39,197 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:39,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1217#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:39,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:39,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:39,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-23 02:30:39,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856138155] [2021-11-23 02:30:39,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:39,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-23 02:30:39,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:39,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-23 02:30:39,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2021-11-23 02:30:39,432 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:39,717 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2021-11-23 02:30:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-23 02:30:39,719 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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 50 [2021-11-23 02:30:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:39,725 INFO L225 Difference]: With dead ends: 102 [2021-11-23 02:30:39,725 INFO L226 Difference]: Without dead ends: 99 [2021-11-23 02:30:39,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2021-11-23 02:30:39,733 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:39,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:30:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-23 02:30:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-23 02:30:39,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-23 02:30:39,761 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2021-11-23 02:30:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:39,761 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-23 02:30:39,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-23 02:30:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 02:30:39,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:39,768 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2021-11-23 02:30:39,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:39,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:39,990 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1575640870, now seen corresponding path program 6 times [2021-11-23 02:30:39,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:39,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135798851] [2021-11-23 02:30:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:39,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:44,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:44,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135798851] [2021-11-23 02:30:44,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135798851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:44,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503181802] [2021-11-23 02:30:44,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:30:44,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:44,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:44,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:44,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:30:44,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:30:44,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:30:44,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 02:30:44,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:45,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:30:56,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503181802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:56,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479894166] [2021-11-23 02:30:56,427 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-23 02:30:56,428 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:56,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:56,428 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:56,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:56,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:56,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:56,497 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:30:56,497 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 39 treesize of output 53 [2021-11-23 02:30:56,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:56,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:56,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:30:56,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:56,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:56,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:56,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-23 02:30:56,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:56,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:30:56,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2021-11-23 02:30:56,649 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-23 02:30:56,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 298 treesize of output 285 [2021-11-23 02:30:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:30:56,799 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:30:56,799 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 29 treesize of output 28 [2021-11-23 02:30:56,815 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:57,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2386#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:57,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:57,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:57,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2021-11-23 02:30:57,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366257901] [2021-11-23 02:30:57,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:57,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-23 02:30:57,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-23 02:30:57,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-23 02:30:57,118 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:57,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:57,872 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2021-11-23 02:30:57,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-23 02:30:57,873 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 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 98 [2021-11-23 02:30:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:57,881 INFO L225 Difference]: With dead ends: 198 [2021-11-23 02:30:57,882 INFO L226 Difference]: Without dead ends: 195 [2021-11-23 02:30:57,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-23 02:30:57,888 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:57,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:30:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-23 02:30:57,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-23 02:30:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-11-23 02:30:57,943 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2021-11-23 02:30:57,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:57,946 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-11-23 02:30:57,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-11-23 02:30:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 02:30:57,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:57,956 INFO L514 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2021-11-23 02:30:58,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:58,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:30:58,181 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1544332582, now seen corresponding path program 7 times [2021-11-23 02:30:58,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:58,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854807277] [2021-11-23 02:30:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:58,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:31:14,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:14,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854807277] [2021-11-23 02:31:14,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854807277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:31:14,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347826629] [2021-11-23 02:31:14,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:31:14,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:14,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:14,079 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:14,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:31:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-23 02:31:14,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:31:15,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:32:00,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347826629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:32:00,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [259986814] [2021-11-23 02:32:00,622 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-23 02:32:00,622 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:32:00,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:32:00,623 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:32:00,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:32:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:32:00,676 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 02:32:00,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-23 02:32:00,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,730 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 02:32:00,733 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 39 treesize of output 53 [2021-11-23 02:32:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:32:00,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:32:00,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-23 02:32:00,930 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-23 02:32:00,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 285 treesize of output 272 [2021-11-23 02:32:01,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:32:01,084 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:32:01,085 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 29 treesize of output 28 [2021-11-23 02:32:01,101 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:32:01,685 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4707#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:32:01,685 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:32:01,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:32:01,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2021-11-23 02:32:01,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461550427] [2021-11-23 02:32:01,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:32:01,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-23 02:32:01,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:01,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-23 02:32:01,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2021-11-23 02:32:01,730 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:32:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:04,206 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2021-11-23 02:32:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-23 02:32:04,207 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 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 194 [2021-11-23 02:32:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:04,211 INFO L225 Difference]: With dead ends: 390 [2021-11-23 02:32:04,211 INFO L226 Difference]: Without dead ends: 387 [2021-11-23 02:32:04,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 60.2s TimeCoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2021-11-23 02:32:04,225 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:04,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:32:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-23 02:32:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-11-23 02:32:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:32:04,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2021-11-23 02:32:04,257 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2021-11-23 02:32:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:04,258 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2021-11-23 02:32:04,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:32:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2021-11-23 02:32:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-23 02:32:04,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:04,269 INFO L514 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2021-11-23 02:32:04,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:04,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 02:32:04,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:04,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1191628506, now seen corresponding path program 8 times [2021-11-23 02:32:04,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:04,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3327479] [2021-11-23 02:32:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:04,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:33:06,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:06,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3327479] [2021-11-23 02:33:06,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3327479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:06,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786903681] [2021-11-23 02:33:06,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:33:06,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:06,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:06,358 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:06,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc37fcca-d0b2-49e0-afac-db6e31816c25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process